25B20

 This 25B20 sprocket is a durable, high quality, and precision sprocket with hardened teeth. Sprockets that have hardened teeth last longer and are much more durable than those that don’t. Something else that is notable about this sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #25 roller chain and sprocket which prevents premature wear or breakage. 25B20 sprockets with a stock bore comes with the standard 1/4″ ID hole with no keyway or set screws and can be easily machine bored to custom sizes.

• Sprocket Size: 25B20
• Tooth Count: 20
• Hub Style: B
• Outside Diameter (O.D): 1.729″
• Stock Bore: 1/4″
• Recommended Maximum Bore: 7/8″
• Hub Diameter: 1-9/32″
• Length Thru Bore: 5/8″
• Sprocket Weight: 0.25 LBS
• Common Interchanges: 25B20H, H25B20, 25B20-SB