{"title":"78-Tooth Sprocket","description":"","products":[{"product_id":"03a78-sprocket","title":"03A78 Sprocket","description":"This 03A78 sprocket is a durable, high quality, and precision A-plate sprocket with 78 teeth that is manufactured out of high-quality steel. Something else that is notable about this sprocket is that it fully meets all ISO Standards, which ensures proper contact between the \u003ca href=\"https:\/\/www.usarollerchain.com\/03B-Roller-Chain-Metric-03B-Roller-Chain-p\/03b-roller-chain.htm\" target=\"_blank\"\u003e03B-1 roller chain\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand sprocket thus preventing premature wear or breakage. 03A78 sprockets with a stock bore come with a 12 millimeter inside diameter plain hole and can be easily machine bored to custom sizes. If you are in need of a custom bore sprocket we the capabilities on providing those to within a fast lead-time and at really great prices. For more information or to get a custom quote please contact us and we will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e03A78 Sprocket Dimensions\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/03B_SPROCKETS_A_PLATE_DWG_8e3dc43a-9892-41e6-9137-3b207ad8625c.png?v=1737617004\" style=\"width: 89px;\" alt=\"03A78 Sprocket\"\u003e\u003cbr\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 03A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003eThickness (T): 2.3mm\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (OD): 126.3mm\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (PD): 124.17mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (ID): 12mm\u003c\/li\u003e\n\u003cli\u003eWeight: 0.33 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714049278319,"sku":"03A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/40A60-SPROCKET-2_cd61584e-4bd6-4cec-a473-125bb55ea3b1.jpg?v=1756322587"},{"product_id":"04a78-sprocket","title":"04A78 Sprocket","description":"This 04A78 sprocket is a durable, high quality, and precision A-plate sprocket with 78 teeth that is manufactured out of high-quality steel. Something else that is notable about this sprocket is that it fully meets all ISO Standards, which ensures proper contact between the \u003ca href=\"https:\/\/www.usarollerchain.com\/04B-Roller-Chain-p\/eco-04b-roller-chain.htm\" target=\"_blank\"\u003e04B-1 roller chain\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand sprocket thus preventing premature wear or breakage. 04A78 sprockets with a stock bore come with an 16 millimeter inside diameter plain hole and can be easily machine bored to custom sizes. If you are in need of a custom bore sprocket we the capabilities on providing those to within a fast lead-time and at really great prices. For more information or to get a custom quote please contact us and we will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e04A78 Sprocket Dimensions\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/03B_SPROCKETS_A_PLATE_DWG_8e3dc43a-9892-41e6-9137-3b207ad8625c.png?v=1737617004\" style=\"width: 97px;\" alt=\"04A78 Sprocket\"\u003e\u003cbr\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 04A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003eSprocket Width (T): 2.6mm\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (OD): 151.5mm\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (PD): 149.01mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (ID): 16mm\u003c\/li\u003e\n\u003cli\u003eWeight: 0.500 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714053210479,"sku":"04A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/40A70-SPROCKET-2_a36e1039-99f6-47a4-8831-98d62adab309.jpg?v=1756322778"},{"product_id":"05a78-sprocket","title":"05A78 Sprocket","description":"This 05A78 sprocket is a durable, high quality, and precision A-plate sprocket with 78 teeth that is manufactured out of high-quality steel. Something else that is notable about this sprocket is that it fully meets all ISO Standards, which ensures proper contact between the \u003ca href=\"https:\/\/www.usarollerchain.com\/05B-Metric-Roller-Chain-p\/eco-05b-roller-chain.htm\" target=\"_blank\"\u003e05B-1 roller chain\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand sprocket thus preventing premature wear or breakage. 05A78 sprockets with a stock bore come with a 20 millimeter inside diameter plain hole and can be easily machine bored to custom sizes. If you are in need of a custom bore sprocket we the capabilities on providing those to within a fast lead-time and at really great prices. For more information or to get a custom quote, please contact us and we will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e05A78 Sprocket Dimensions\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/03B_SPROCKETS_A_PLATE_DWG_8e3dc43a-9892-41e6-9137-3b207ad8625c.png?v=1737617004\" style=\"width: 107px;\" alt=\"05A78 Sprocket\"\u003e\u003cbr\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 05A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (OD): 202.8mm\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (PD): 198.68mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (ID): 20mm\u003c\/li\u003e\n\u003cli\u003eTooth Thickness (T): 2.8mm\u003c\/li\u003e\n\u003cli\u003eWeight: 0.87 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714058649967,"sku":"05A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/05A72-SPROCKET-2_ee7f9cbf-7380-492e-87ea-c5d8756ffe51.jpg?v=1756323002"},{"product_id":"081a78-sprocket","title":"081A78 Sprocket","description":"This A-plate 081A78 sprocket with a stock bore is a metric roller chain sprocket manufactured under ISO and British Standard 228. Our 081A78 sprockets are made with reliability and performance in mind, so we use high-quality carbon steel (CS) and have the sprocket precision cut to ensure maximum performance and wear life. Besides the stock bore, we also can supply these sprockets with a specific bore size. We also offer upgrades on our 081A78 sprockets such as black-oxide coatings and heat-treated hardened teeth, though hardened tooth sprockets are typically not utilized on tooth counts past 30. Besides the 78 tooth sprocket, we also stock a high-quality \u003ca href=\"https:\/\/www.usarollerchain.com\/081B-Roller-Chain-Metric-081B-Roller-Chain-p\/081b-roller-chain.htm\" target=\"_blank\"\u003e081 roller chain\u003c\/a\u003e and a wide array of \u003ca href=\"https:\/\/www.usarollerchain.com\/collections\/Roller-Chain-Accessories-s-4958\"\u003eroller chain accessories\u003c\/a\u003e. For more information or to get a quote on 081A78 sprockets, please contact us and one of our sales team members will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e081A78 Sprocket Dimensions\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/081_A_DWG_9691d785-f0f8-4c7e-990d-70d118845a59.png?v=1737617881\" style=\"width: 83px;\" alt=\"081A78 Sprocket\"\u003e\u003cbr\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 081A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (O): 315.40mm\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (K): 322.20mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (D): 25mm\u003c\/li\u003e\n\u003cli\u003eSprocket Width: 3mm\u003c\/li\u003e\n\u003cli\u003eSprocket Weight: 2.00 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714069234031,"sku":"081A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/25A18-SPROCKET-2_20d872ea-dd5a-48be-b897-f687355b7b4e.jpg?v=1780430803"},{"product_id":"083a78-sprocket","title":"083A78 Sprocket","description":"This A-plate 083A78 sprocket with a stock bore is a metric roller chain sprocket manufactured under ISO and British Standard 228. Our 083A78 sprockets are made with reliability and performance in mind, so we use high-quality carbon steel (CS) and have the sprocket precision cut to ensure maximum performance and wear life. Besides the stock bore, we also can supply these sprockets with a specific bore size. We also offer upgrades on our 083A78 sprockets such as black-oxide coatings and heat-treated hardened teeth, though hardened tooth sprockets are typically not utilized on tooth counts past 30. Besides the 78 tooth sprocket, we also stock a high-quality \u003ca href=\"https:\/\/www.usarollerchain.com\/083B-Roller-Chain-Metric-083B-Roller-Chain-p\/083b-roller-chain.htm\" target=\"_blank\"\u003e083 roller chain\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand a wide array of \u003ca href=\"https:\/\/www.usarollerchain.com\/collections\/Roller-Chain-Accessories-s-4958\"\u003eroller chain accessories\u003c\/a\u003e. For more information or to get a quote on 083A78 sprockets, please contact us and one of our sales team members will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e083A78 Sprocket Dimensions\u003c\/h3\u003e\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/081_A_DWG_9691d785-f0f8-4c7e-990d-70d118845a59.png?v=1737617881\" style=\"font-size: 16px; font-weight: 400; color: rgb(48, 56, 71); width: 79px;\" alt=\"083A78 Sprocket\"\u003e\u003c\/h3\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 083A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (O): 315.40mm\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (K): 322.2mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (D): 25mm\u003c\/li\u003e\n\u003cli\u003eSprocket Width: 4.5mm\u003c\/li\u003e\n\u003cli\u003eSprocket Weight: 3.100 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714072871279,"sku":"083A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/25A18-SPROCKET-2_97265fc2-f56c-4c1c-8470-6019f3ad9a7c.jpg?v=1780430807"},{"product_id":"085a78-sprocket","title":"085A78 Sprocket","description":"This A-plate 085A78 sprocket with a stock bore is a metric roller chain sprocket manufactured under ISO and British Standard 228. Our 085A78 sprockets are made with reliability and performance in mind, so we use high-quality carbon steel (CS) and have the sprocket precision cut to ensure maximum performance and wear life. Besides the stock bore, we also can supply these sprockets with a specific bore size. We also offer upgrades on our 085A78 sprockets such as black-oxide coatings and heat-treated hardened teeth, though hardened tooth sprockets are typically not utilized on tooth counts past 30. Besides the 78 tooth sprocket, we also stock a high-quality \u003ca href=\"https:\/\/www.usarollerchain.com\/085B-Roller-Chain-Metric-085B-Roller-Chain-p\/085b-roller-chain.htm\" target=\"_blank\"\u003e085 roller chain\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand a wide array of \u003ca href=\"https:\/\/www.usarollerchain.com\/collections\/Roller-Chain-Accessories-s-4958\"\u003eroller chain accessories\u003c\/a\u003e. For more information or to get a quote on 085A78 sprockets, please contact us and one of our sales team members will be happy to assist you. \u003cbr\u003e\u003cbr\u003e\n\u003ch3\u003e085A78 Sprocket Dimensions\u003c\/h3\u003e\u003ch3\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/081_A_DWG_9691d785-f0f8-4c7e-990d-70d118845a59.png?v=1737617881\" style=\"font-size: 16px; font-weight: 400; color: rgb(48, 56, 71); width: 84px;\" alt=\"085A78 Sprocket\"\u003e\u003c\/h3\u003e\u003cul style=\"letter-spacing: normal;\"\u003e\n\u003cli\u003eSprocket Size: 085A78\u003c\/li\u003e\n\u003cli\u003eTooth Count: 78\u003c\/li\u003e\n\u003cli\u003ePitch Diameter (O): 315.40mm\u003c\/li\u003e\n\u003cli\u003eOutside Diameter (K): 322.2mm\u003c\/li\u003e\n\u003cli\u003eStock Bore (D): 25mm\u003c\/li\u003e\n\u003cli\u003eSprocket Width: 5.9mm\u003c\/li\u003e\n\u003cli\u003eSprocket Weight: 3.1 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"USA ROLLER CHAIN","offers":[{"title":"Default Title","offer_id":51714076508527,"sku":"085A78-SPROCKET","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0187\/7925\/files\/25A18-SPROCKET-2_56827407-4dd7-4085-95a6-8af44c9b1f90.jpg?v=1780430817"}],"url":"https:\/\/usarollerchain.com\/collections\/78-tooth-chain-sprockets-s-6105.oembed","provider":"USA ROLLER CHAIN","version":"1.0","type":"link"}