{"id":3204,"date":"2026-05-12T06:32:14","date_gmt":"2026-05-12T06:32:14","guid":{"rendered":"https:\/\/sprocket-chain.net\/?post_type=product&#038;p=3204"},"modified":"2026-05-12T06:32:14","modified_gmt":"2026-05-12T06:32:14","slug":"roller-chain-sprockets","status":"publish","type":"product","link":"https:\/\/sprocket-chain.net\/cs\/produkt\/roller-chain-sprockets\/","title":{"rendered":"Ozuben\u00e1 kola pro v\u00e1le\u010dkov\u00e9 \u0159et\u011bzy | A-deska a B-n\u00e1boj \u2013 18 a\u017e 72 zub\u016f, ocel SAE 1045"},"content":{"rendered":"<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; margin-top: 0; font-size: 1.25em;\">#25 Chain Sprockets \u2014 ANSI Light-Duty Series, A-Plate and B-Hub<\/h2>\n<p style=\"font-size: 15px;\">#25 roller chain is the smallest ANSI standard chain size, with a pitch of 1\/4 inch (6.35 mm) and a breaking strength of approximately 780 lbf (354 kgf). The corresponding #25 sprockets are designed for drives where the transmitted power is low but precision and smooth engagement matter \u2014 think instrument panel drives, vending machine mechanisms, seed counting equipment, and light packaging machinery. The 1\/4-inch pitch means a high tooth count can be achieved in a very compact outside diameter, which is why #25 drives are often found in space-constrained control mechanisms.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3203\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/Six-Standard-Hub-Configurations.webp\" alt=\"\u0160est standardn\u00edch konfigurac\u00ed hubu\" width=\"1536\" height=\"1024\" title=\"\" srcset=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/Six-Standard-Hub-Configurations.webp 1536w, https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/Six-Standard-Hub-Configurations-1280x853.webp 1280w, https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/Six-Standard-Hub-Configurations-980x653.webp 980w, https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/Six-Standard-Hub-Configurations-480x320.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 1536px, 100vw\" \/><\/p>\n<p style=\"font-size: 15px;\">Korea Ever-Power manufactures #25 sprockets in two hub configurations. A-plate sprockets (25A series, 18\u201372 teeth) are flat discs with no hub \u2014 minimal axial thickness, suitable for flush-mount or weld-on installations. B-hub sprockets (25B series, 10\u201372 teeth) carry a single-sided hub that extends shaft engagement length and accepts a keyway plus set screws for reliable torque transmission. Both types are SAE 1045 steel with black oxide finish as standard.<\/p>\n<ul style=\"list-style: none; padding: 0; margin: 16px 0 0; background: #fff9f5; border-radius: 6px;\">\n<li style=\"padding: 9px 14px; border-bottom: 1px solid #f0d5c0; display: flex; gap: 10px; align-items: center; font-size: 15px;\"><span style=\"color: #c45c00; flex-shrink: 0;\">\u2699<\/span>Chain: ANSI #25 \u2014 pitch 1\/4\u2033 (6.35 mm), roller dia 0.130\u2033, inner width 0.125\u2033<\/li>\n<li style=\"padding: 9px 14px; border-bottom: 1px solid #f0d5c0; display: flex; gap: 10px; align-items: center; font-size: 15px;\"><span style=\"color: #c45c00; flex-shrink: 0;\">\u2699<\/span>A-plate range: 18\u201372 teeth, OD 1.568\u2033\u20135.876\u2033, weight 0.04\u20130.74 lb<\/li>\n<li style=\"padding: 9px 14px; border-bottom: 1px solid #f0d5c0; display: flex; gap: 10px; align-items: center; font-size: 15px;\"><span style=\"color: #c45c00; flex-shrink: 0;\">\u2699<\/span>B-hub range: 10\u201372 teeth, OD 0.919\u2033\u20135.876\u2033, weight 0.03\u20131.30 lb<\/li>\n<li style=\"padding: 9px 14px; display: flex; gap: 10px; align-items: center; font-size: 15px;\"><span style=\"color: #c45c00; flex-shrink: 0;\">\u2699<\/span>Material: SAE 1045 steel, black oxide finish, ANSI B29.1 compliant<\/li>\n<\/ul>\n<p><!-- MODULE B: SPEC TABLE \u2014 A-PLATE --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; margin-top: 36px; font-size: 1.25em;\">#25 A-Plate Sprocket Specifications<\/h2>\n<p style=\"font-size: 15px;\">A-plate (#25A) sprockets have no hub projection \u2014 the bore passes directly through the flat plate body. The stock bore listed is the minimum standard bore; larger bores up to the outside diameter constraint can be machined on request. Outside diameter values below are nominal imperial measurements per ANSI B29.1.<\/p>\n<div style=\"overflow-x: auto; width: 100%; margin-bottom: 28px;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 420px; font-size: 13px;\">\n<thead>\n<tr style=\"background: #c45c00; color: #fff; text-align: center;\">\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Velikost ozuben\u00e9ho kola<\/th>\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Zuby<\/th>\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Typ<\/th>\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Outside Dia.<\/th>\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Pa\u017ebov\u00fd otvor<\/th>\n<th style=\"padding: 9px 8px; border: 1px solid #a84e00;\">Hmotnost (libry)<\/th>\n<\/tr>\n<\/thead>\n<tbody style=\"text-align: center;\">\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A18<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">18<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.568\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.04<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A19<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">19<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.648\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.04<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A20<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">20<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.729\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.04<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A21<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">21<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.809\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.04<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A22<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">22<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.889\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.06<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A23<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">23<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1.969\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.06<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A24<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">24<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.049\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.08<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A25<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.129\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.08<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A26<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">26<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.209\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.09<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A28<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">28<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.369\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.11<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A30<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">30<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.529\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.13<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A36<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">36<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">2.972\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.15<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A42<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">42<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3.454\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.19<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A48<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">48<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">3.937\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.24<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A54<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">54<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">4.442\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.38<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A60<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">60<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">4.920\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.54<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">25A72<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">72<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">A<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">5.876\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 6px; border: 1px solid #f0d5c0;\">0.74<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- MODULE C: SPEC TABLE \u2014 B-HUB --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">#25 B-Hub Sprocket Specifications<\/h2>\n<p style=\"font-size: 15px;\">B-hub (#25B) sprockets carry a single hub projection on one face, providing a longer bore engagement length for keyway-and-set-screw shaft retention. The &#8220;Recommend Max. Bore&#8221; column is the largest bore that can be machined while maintaining adequate hub wall thickness. &#8220;Length Thru Bore&#8221; is the overall axial hub engagement depth \u2014 a critical value when sizing a key length or checking shaft protrusion clearance.<\/p>\n<div style=\"overflow-x: auto; width: 100%; margin-bottom: 32px;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 560px; font-size: 13px;\">\n<thead>\n<tr style=\"background: #c45c00; color: #fff; text-align: center;\">\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Velikost<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Zuby<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">OD<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Pa\u017ebov\u00fd otvor<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Max Bore<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Pr\u016fm\u011br n\u00e1boje.<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">D\u00e9lka skrz otvor<\/th>\n<th style=\"padding: 9px 7px; border: 1px solid #a84e00;\">Hmotnost (libry)<\/th>\n<\/tr>\n<\/thead>\n<tbody style=\"text-align: center;\">\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B10<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">10<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.919\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.03<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B11<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">11<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.002\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/16\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">9\/16\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.04<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B12<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">12<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.083\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.06<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B13<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">13<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.167\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">7\/16\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">23\/32\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.07<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B14<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">14<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.248\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.08<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B15<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">15<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.330\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">7\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.09<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B16<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">16<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.410\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">7\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.10<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B17<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">17<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.492\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">7\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.12<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B18<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">18<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.568\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.13<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B20<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">20<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.729\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.14<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B21<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">21<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.809\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-1\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.15<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B24<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">24<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2.049\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-1\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.18<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B30<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">30<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2.529\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-1\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.27<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B36<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">36<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2.972\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-1\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.37<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B42<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">42<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3.454\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-1\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.49<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B48<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">48<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3.937\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.75<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B54<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">54<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">4.442\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">0.90<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B60<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">60<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">4.920\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.10<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B70<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">70<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5.717\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.25<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">25B72<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">72<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">5.876\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1\/2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1-3\/8\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">2\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">3\/4\u2033<\/td>\n<td style=\"padding: 7px 5px; border: 1px solid #f0d5c0;\">1.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; border-radius: 6px; margin-bottom: 28px;\" title=\"#25 roller chain pitch 6.35mm components definition\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/roller-chain-components-and-pitch-definition.webp\" alt=\"#25 roller chain pitch 6.35mm components definition\" \/><\/p>\n<p><!-- MODULE: WHY SAE 1045 BEATS 1018 --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">SAE 1045 vs. SAE 1018 Steel \u2014 Why the Material Grade Matters<\/h2>\n<p style=\"font-size: 15px;\">Many #25 sprockets in the market are made from SAE 1018 low-carbon steel \u2014 the industry baseline. Korea Ever-Power specifies SAE 1045 medium-carbon steel for all sprockets. The difference is not marketing language \u2014 it has measurable consequences for how long the sprocket lasts in service.<\/p>\n<div style=\"overflow-x: auto; width: 100%; margin-bottom: 14px;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 400px; font-size: 14px;\">\n<thead>\n<tr style=\"background: #c45c00; color: #fff; text-align: left;\">\n<th style=\"padding: 10px 12px; border: 1px solid #a84e00;\">Vlastnictv\u00ed<\/th>\n<th style=\"padding: 10px 12px; border: 1px solid #a84e00;\">SAE 1045 (Korea Ever-Power)<\/th>\n<th style=\"padding: 10px 12px; border: 1px solid #a84e00;\">SAE 1018 (Common Baseline)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Carbon content<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">0.43\u20130.50%<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">0.15\u20130.20%<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Pevnost v tahu<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\"><strong style=\"color: #c45c00;\">570\u2013700 MPa<\/strong><\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">400\u2013490 MPa<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Surface hardness (normalised)<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">163\u2013207 HB<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">126\u2013163 HB<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Induction hardenability<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\"><strong style=\"color: #c45c00;\">Excellent \u2014 achieves 50\u201358 HRC surface<\/strong><\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Poor \u2014 insufficient carbon for deep hardening<\/td>\n<\/tr>\n<tr style=\"background: #fff4ec;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Tooth wear resistance<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Significantly higher \u2014 especially on small sprockets<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Adequate for very low-speed, low-load applications only<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Obrobitelnost<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Good \u2014 suitable for custom bore machining<\/td>\n<td style=\"padding: 9px 12px; border: 1px solid #f0d5c0;\">Very good \u2014 easier to machine, but at cost of strength<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size: 13px; color: #666; padding-left: 10px; border-left: 3px solid #f0d5c0; margin-bottom: 32px; line-height: 1.7;\">For #25 sprockets specifically, the higher tensile strength of SAE 1045 matters because the small pitch means each tooth carries load over a short engagement arc. Higher tooth-face hardness (achieved through induction hardening on sub-30-tooth sprockets) directly extends the period before tooth-face wear requires sprocket replacement.<\/p>\n<p><!-- MODULE: CHARACTERISTIC OF #25 CHAIN DRIVES --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">Characteristics of #25 Chain Drive Systems<\/h2>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; border-radius: 6px; margin-bottom: 16px;\" title=\"#25 roller chain sprocket engagement animation small pitch drive\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/chain-and-sprocket-animation.gif\" alt=\"#25 roller chain sprocket engagement animation small pitch drive\" \/><\/p>\n<p style=\"font-size: 15px;\">#25 is the lightest and most compact ANSI roller chain size, and this brings specific design characteristics that engineers working with #25 drives should understand before specifying sprockets:<\/p>\n<div style=\"margin: 16px 0 28px; display: flex; flex-direction: column; gap: 12px;\">\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 10px 14px; display: flex; align-items: center; gap: 10px; font-weight: bold; font-size: 0.95em;\"><span style=\"flex-shrink: 0;\">\ud83d\udcd0<\/span> Compact Pitch = Higher Tooth Count in Small Diameter<\/div>\n<div style=\"padding: 14px 14px; background: #fff9f5;\">\n<p style=\"margin: 0; font-size: 15px;\">A 36-tooth #25 sprocket has an outside diameter of just 2.972\u2033 (75.5 mm). To achieve the same pitch circle with an #80 chain (a common mid-range size), you would need a 9-tooth sprocket \u2014 which is below the recommended minimum. This compact-to-tooth-count ratio makes #25 ideal for high gear-ratio drives in small enclosures, where a 4:1 or 5:1 ratio can be achieved with sprockets that fit inside a standard equipment panel.<\/p>\n<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 10px 14px; display: flex; align-items: center; gap: 10px; font-weight: bold; font-size: 0.95em;\"><span style=\"flex-shrink: 0;\">\u26a1<\/span> Speed Limits and Polygon Effect<\/div>\n<div style=\"padding: 14px 14px; background: #fff9f5;\">\n<p style=\"margin: 0; font-size: 15px;\">#25 chain can run at higher shaft speeds than larger chains before noise and wear become problematic \u2014 because the small pitch means a higher number of tooth engagements per unit length, which smooths out the polygon effect. Practical speed limits for #25 drives are approximately 1,500\u20132,000 rpm on a 17-tooth sprocket, which equates to a chain speed of around 7\u20139 m\/s. Above this, vibration and noise increase rapidly and a timing belt or gear drive should be considered instead.<\/p>\n<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 10px 14px; display: flex; align-items: center; gap: 10px; font-weight: bold; font-size: 0.95em;\"><span style=\"flex-shrink: 0;\">\ud83d\udd27<\/span> Lubrication and Maintenance<\/div>\n<div style=\"padding: 14px 14px; background: #fff9f5;\">\n<p style=\"margin: 0; font-size: 15px;\">#25 chain is more sensitive to inadequate lubrication than heavier chains because the small pin and bushing diameters leave little tolerance for additional wear before the chain pitch elongates beyond the replacement threshold. Apply a light penetrating chain lubricant every 200\u2013400 hours for drives operating at moderate speeds. In dusty environments, keep sprockets clean \u2014 abrasive particles embedded between roller and sprocket tooth are the primary cause of accelerated wear on small-pitch drives.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- MODULE: APPLICATIONS --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">Typical Applications for #25 Chain and Sprockets<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 16px; margin: 20px 0 32px;\">\n<div style=\"flex: 1 1 260px; box-sizing: border-box; background: #fff; border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #c45c00; color: #fff; padding: 10px 14px; font-weight: bold; font-size: 0.95em;\">\ud83d\udd2c Instruments and Scientific Equipment<\/div>\n<p><img decoding=\"async\" style=\"width: 100%; height: auto; display: block;\" title=\"#25 sprocket scientific instrument laboratory equipment\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/sprocket-and-chain-application-1-300x225.webp\" alt=\"#25 sprocket scientific instrument laboratory equipment\" \/><\/p>\n<p style=\"padding: 12px 14px; margin: 0; font-size: 14px;\">Analytical instruments, laboratory automation equipment, and medical diagnostic devices frequently use #25 chain drives for sample transport mechanisms, reagent positioning stages, and dosing pump drives. The compact size and low weight per unit length (approximately 0.08 kg\/m for #25 standard) make it the practical choice where mechanical noise and vibration must be minimised and the load is below 1 kW.<\/p>\n<\/div>\n<div style=\"flex: 1 1 260px; box-sizing: border-box; background: #fff; border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #c45c00; color: #fff; padding: 10px 14px; font-weight: bold; font-size: 0.95em;\">\ud83c\udfed Packaging and Vending Machinery<\/div>\n<p><img decoding=\"async\" style=\"width: 100%; height: auto; display: block;\" title=\"#25 sprocket packaging vending machine mechanism\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/sprocket-and-chain-application-2-300x225.webp\" alt=\"#25 sprocket packaging vending machine mechanism\" \/><\/p>\n<p style=\"padding: 12px 14px; margin: 0; font-size: 14px;\">Vending machines, packaging equipment, and food dispensing systems across Korea use #25 chain extensively for product transport belts, elevator mechanisms, and portion-control drives. The B-hub 25B14 to 25B24 range covers most vending mechanism drive requirements. The black oxide finish provides adequate corrosion resistance for temperature-controlled indoor environments where these machines typically operate.<\/p>\n<\/div>\n<div style=\"flex: 1 1 260px; box-sizing: border-box; background: #fff; border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #c45c00; color: #fff; padding: 10px 14px; font-weight: bold; font-size: 0.95em;\">\ud83c\udf3e Seed Metering and Precision Agriculture<\/div>\n<p><img decoding=\"async\" style=\"width: 100%; height: auto; display: block;\" title=\"#25 sprocket seed drill metering agricultural precision\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/sprocket-and-chain-application-3-300x212.webp\" alt=\"#25 sprocket seed drill metering agricultural precision\" \/><\/p>\n<p style=\"padding: 12px 14px; margin: 0; font-size: 14px;\">Precision seed drills and transplanting machines use #25 chain for final drive to seed metering discs where fine tooth-count increments allow precise seeding rate adjustment. A-plate sprockets in the 25A30\u201325A54 range are typical for this application \u2014 the flat profile allows multiple sprockets to be stacked side-by-side on the same shaft for different seed spacing selections.<\/p>\n<\/div>\n<\/div>\n<p><!-- MODULE: MATCHING CHAIN + COMPANION LINK --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">Compatible #25 Roller Chain<\/h2>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; border-radius: 6px; margin-bottom: 16px;\" title=\"#25 ANSI roller chain light duty 1\/4 inch pitch\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/chain-1.webp\" alt=\"#25 ANSI roller chain light duty 1\/4 inch pitch\" \/><\/p>\n<p style=\"font-size: 15px;\">All #25 sprockets listed above are dimensioned for use with ANSI <a style=\"color: #c45c00; text-decoration: none; border-bottom: 1px solid #e8a87c;\" href=\"https:\/\/sprocket-chain.net\/cs\/kategorie-produktu\/chain\/\">#25 roller chain<\/a> \u2014 pitch 0.250\u2033 (6.35 mm), roller diameter 0.130\u2033, inner width 0.125\u2033. Korea Ever-Power stocks #25 chain in single-strand, double-strand (#25-2), and connecting links to pair with the sprockets above. When ordering a matched set, specify the tooth counts for both driver and driven sprocket plus your shaft centre distance, and we will calculate the required chain link count.<\/p>\n<p style=\"font-size: 15px;\">For broader <a style=\"color: #c45c00; text-decoration: none; border-bottom: 1px solid #e8a87c;\" href=\"https:\/\/chain-sprockets.net\/\" target=\"_blank\" rel=\"noopener\">syst\u00e9m \u0159et\u011bzu a ozuben\u00e9ho kola<\/a> guidance covering power rating selection, centre distance calculations, and lubrication recommendations for #25 drives, our technical team can assist before your order is placed.<\/p>\n<p><!-- MODULE: WHY KOREA EVER-POWER --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">Pro\u010d Korea Ever-Power Chain and Sprocket<\/h2>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; border-radius: 6px; margin-bottom: 16px;\" title=\"Korea Ever-Power sprocket manufacturing workshop #25 chain sprocket\" src=\"https:\/\/sprocket-chain.net\/wp-content\/uploads\/2026\/05\/ever-power-workshop-1.webp\" alt=\"Korea Ever-Power sprocket manufacturing workshop #25 chain sprocket\" \/><\/p>\n<p style=\"font-size: 15px;\"><a style=\"color: #c45c00; text-decoration: none; border-bottom: 1px solid #e8a87c;\" href=\"https:\/\/sprocket-chain.net\/cs\/\">Korea Ever-Power Chain and Sprocket Co., Ltd.<\/a> stocks the complete #25 A-plate and B-hub range with fast Korea dispatch:<\/p>\n<div style=\"margin: 16px 0 32px;\">\n<div style=\"display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0d5c0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>SAE 1045 steel as standard<\/strong> \u2014 not the 1018 baseline used by many suppliers; measurably higher tensile strength and hardenability<\/div>\n<div style=\"display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0d5c0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>Induction-hardened teeth<\/strong> on all sprockets with fewer than 30 teeth \u2014 reduced wear rate on the most-stressed small sprockets<\/div>\n<div style=\"display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0d5c0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>Full A-plate and B-hub range in stock<\/strong> \u2014 18\u201372T A-plate and 10\u201372T B-hub, all standard sizes available without special-order lead time<\/div>\n<div style=\"display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0d5c0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>Obr\u00e1b\u011bn\u00ed zak\u00e1zkov\u00fdch otvor\u016f<\/strong> \u2014 keyways and set screw tappings to drawing; 5\u201310 day turnaround for custom bore orders<\/div>\n<div style=\"display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid #f0d5c0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>ANSI B29.1 pitch diameter verified<\/strong> \u2014 dimensional inspection on each production batch before dispatch<\/div>\n<div style=\"display: flex; gap: 12px; padding: 10px 0; align-items: flex-start; font-size: 15px;\"><span style=\"color: #c45c00; font-weight: bold; flex-shrink: 0;\">\u2726<\/span><strong>7\u201314 day Korea delivery<\/strong> \u2014 no import wait; matched #25 chain available from the same stock location<\/div>\n<\/div>\n<p><!-- MODULE: FAQ --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n<div style=\"display: flex; flex-direction: column; gap: 10px; margin-bottom: 32px;\">\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">What is the difference between #25 and #35 chain \u2014 can I use a #25 sprocket with #35 chain?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">#25 and #35 are both ANSI standard chains but with different pitches \u2014 #25 has a 1\/4-inch pitch (6.35 mm) and #35 has a 3\/8-inch pitch (9.525 mm). They are not interchangeable. A #25 sprocket will not mesh correctly with #35 chain. Always match the sprocket chain number to the chain markings exactly. The chain number stamped on the outer plate or connecting link is the definitive reference.<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">Why does the B-hub series start at 10 teeth but A-plate starts at 18 teeth?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">Small tooth counts (10\u201317) require a hub for adequate shaft engagement because the sprocket outside diameter at these tooth counts is too small to have a usable bore through a flat plate alone \u2014 the wall thickness between bore and tooth root would be insufficient for a key. The B-hub provides the necessary engagement length by extending the bore into the hub projection. From 18 teeth upward, the plate body is large enough in diameter to support a flat-plate bore with adequate wall thickness.<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">What is the maximum shaft diameter for a 25B18 sprocket?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">The 25B18 has a recommended maximum bore of 3\/4\u2033. This is the largest bore that can be machined while leaving a hub wall thick enough for a standard set screw and key. The stock bore supplied is 1\/4\u2033 \u2014 any bore between 1\/4\u2033 and 3\/4\u2033 can be machined to your exact shaft dimension. Specify the required bore diameter, keyway width and depth, and whether you need one or two set screws when ordering a custom-bore sprocket.<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">Can #25 sprockets run stainless steel chain?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">Yes. #25 stainless steel roller chain has the same pitch (1\/4 inch), roller diameter, and inner width as standard #25 chain \u2014 so #25 steel sprockets mesh with stainless chain without any dimensional modification. However, if the application requires corrosion resistance throughout the drive (e.g., food processing wash-down environments), specify our stainless steel #25 sprockets to match. Running stainless chain on carbon steel sprockets creates a galvanic and chemical environment that can accelerate tooth corrosion on the sprocket side over time in wet conditions.<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">How do I prevent #25 chain from jumping off the sprocket during reversing operation?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">Chain derailment during reversal is usually caused by too much slack in the chain at the moment of direction change. For any drive that reverses frequently: keep chain sag below 2% of centre distance rather than the standard 2\u20134%; use a chain tensioner on the slack run; and increase the minimum tooth count to at least 17 on the smaller sprocket. A sprocket with fewer than 15 teeth on a reversing drive will experience significant wrap-angle loss on each reversal, which combined with chain inertia is the primary cause of derailment.<\/div>\n<\/div>\n<div style=\"border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #fce8d8; color: #c45c00; padding: 11px 14px; font-weight: bold; font-size: 0.95em;\">What is the recommended centre distance for a #25 chain drive?<\/div>\n<div style=\"padding: 13px 14px; background: #fff9f5; font-size: 15px; line-height: 1.75;\">ANSI B29.1 recommends a centre distance of 30\u201350 times the chain pitch. For #25 chain (6.35 mm pitch) this gives an ideal centre distance range of approximately 190\u2013320 mm. Below 30 pitches, the wrap angle on the smaller sprocket becomes too small for reliable engagement. Above 50 pitches, chain vibration and the difficulty of maintaining correct tension increase. For very short centre distances (under 30 pitches), a larger chain size with fewer teeth on each sprocket is usually a better solution.<\/div>\n<\/div>\n<\/div>\n<p><!-- MODULE: REVIEWS --><\/p>\n<h2 style=\"color: #c45c00; border-left: 4px solid #c45c00; padding-left: 12px; font-size: 1.25em;\">Recenze z\u00e1kazn\u00edk\u016f<\/h2>\n<p style=\"color: #666; font-size: 13px; margin-bottom: 16px;\">Ov\u011b\u0159en\u00e1 zp\u011btn\u00e1 vazba od z\u00e1kazn\u00edk\u016f v Koreji a okoln\u00edch trz\u00edch.<\/p>\n<div style=\"display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px;\">\n<div style=\"border-radius: 8px; padding: 16px; background: #fff9f5; border-left: 4px solid #c45c00;\">\n<p><strong style=\"color: #c45c00; display: block; margin-bottom: 6px; font-size: 14px;\">Lee Jae-won, R&amp;D Engineer, Medical Device Company, Seongnam (early 2025)<\/strong><\/p>\n<p style=\"margin: 0; font-size: 14px; line-height: 1.75;\">&#8220;We use #25 chain drives in a sample transport mechanism inside a diagnostic instrument. Precision and low noise are non-negotiable. Korea Ever-Power 25B18 and 25B30 sprockets have been running in our prototype for six months without measurable pitch diameter wear. The custom bore machining (8mm diameter, 3mm key) was accurate to within our drawing tolerance of \u00b10.02mm.&#8221;<\/p>\n<\/div>\n<div style=\"border-radius: 8px; padding: 16px; background: #fff; border-left: 4px solid #c45c00;\">\n<p><strong style=\"color: #c45c00; display: block; margin-bottom: 6px; font-size: 14px;\">Kwon Min-seo, Mechanical Engineer, Vending Machine Manufacturer, Gyeonggi-do (2024)<\/strong><\/p>\n<p style=\"margin: 0; font-size: 14px; line-height: 1.75;\">&#8220;We buy #25 B-hub sprockets in 14T, 18T, and 24T for our vending machine product elevator mechanisms. Korea Ever-Power stock these in the correct bore sizes and lead time is consistently 9\u201311 days. We have been sourcing from them for about 14 months and have had zero dimensional non-conformances on arrival inspection.&#8221;<\/p>\n<\/div>\n<div style=\"border-radius: 8px; padding: 16px; background: #fff9f5; border-left: 4px solid #c45c00;\">\n<p><strong style=\"color: #c45c00; display: block; margin-bottom: 6px; font-size: 14px;\">Ahn Soo-ji, Production Engineer, Agricultural Equipment OEM, Chungbuk (Q4 2024)<\/strong><\/p>\n<p style=\"margin: 0; font-size: 14px; line-height: 1.75;\">&#8220;For seed drill metering drives we need multiple tooth count options in A-plate to adjust seeding rates without changing the chain. We use 25A30, 25A36, 25A42, and 25A48. Korea Ever-Power supplies all four in a single order. The flat plate profile stacks cleanly on our metering shaft with minimal spacing, which is exactly what our design requires.&#8221;<\/p>\n<\/div>\n<div style=\"border-radius: 8px; padding: 16px; background: #fff; border-left: 4px solid #c45c00;\">\n<p><strong style=\"color: #c45c00; display: block; margin-bottom: 6px; font-size: 14px;\">Park Ji-ho, Maintenance Technician, Electronics Assembly Plant, Incheon (2025)<\/strong><\/p>\n<p style=\"margin: 0; font-size: 14px; line-height: 1.75;\">&#8220;We maintain #25 chain drives on component transport trays in our PCB assembly line. The SAE 1045 sprockets from Korea Ever-Power last noticeably longer than the 1018-based sprockets we used previously from a domestic supplier. Specifically the 25B12 and 25B15 \u2014 the small teeth used to show wear after about 4 months. With Ever-Power we are now at 9 months on the current set without tooth-face wear reaching the replacement threshold.&#8221;<\/p>\n<\/div>\n<div style=\"border-radius: 8px; padding: 16px; background: #fff9f5; border-left: 4px solid #c45c00;\">\n<p><strong style=\"color: #c45c00; display: block; margin-bottom: 6px; font-size: 14px;\">Oh Sung-min, Design Engineer, Printing Equipment Company, Seoul (early 2025)<\/strong><\/p>\n<p style=\"margin: 0; font-size: 14px; line-height: 1.75;\">&#8220;#25 A-plate sprockets for auxiliary register drives on our sheet-fed press. We needed 25A20 and 25A30 with a 6mm bore, which is non-standard. Korea Ever-Power machined the custom bore with a 2mm key slot exactly to our drawing. The response time from drawing submission to delivery confirmation was four business days.&#8221;<\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<div style=\"border-left: 4px solid #c45c00; background: #fff4ec; padding: 16px 18px; margin-bottom: 32px; border-radius: 0 6px 6px 0;\">\n<p style=\"margin: 0; line-height: 1.8; color: #1a1a1a; font-size: 15px;\">Korea Ever-Power <strong style=\"color: #c45c00;\">#25 roller chain sprockets<\/strong> cover A-plate (18\u201372 teeth, outside diameter 1.568\u2033\u20135.876\u2033) and B-hub (10\u201372 teeth) configurations in SAE 1045 steel with precision-cut teeth and black oxide finish. At just <strong style=\"color: #c45c00;\">0.03\u20131.30 lb per unit<\/strong>, these are the lightest sprockets in the ANSI range \u2014 ideal for small-format drive systems in instrumentation, <a style=\"color: #c45c00; text-decoration: none; border-bottom: 1px solid #e8a87c;\" href=\"https:\/\/sprocket-chain.net\/cs\/kategorie-produktu\/chain\/\">light conveyor chain<\/a> applications, medical equipment, and precision machinery across Korea.<\/p>\n<\/div>","protected":false},"featured_media":3202,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[6658],"product_tag":[],"class_list":{"0":"post-3204","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-sprocket","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/product\/3204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/comments?post=3204"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/media\/3202"}],"wp:attachment":[{"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/media?parent=3204"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/product_brand?post=3204"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/product_cat?post=3204"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/sprocket-chain.net\/cs\/wp-json\/wp\/v2\/product_tag?post=3204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}