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This R4A-ZZ ball bearing is a high-precision premium quality shielded deep groove 1/4"x3/4"x0
and precision 60 tooth sprocket that is manufactured to accept a 3020 bushing
This 35BS23 sprocket features a 1" finished bore including a key-way and two setscrews
35B25 sprockets with a stock bore comes with the standard 1/2" ID hole with no keyway or set screws and can be easily machine bored to custom sizes
Limiting Speed (OIL): 34000 RPM
40A28 Sprocket Stock Bore ANSI 40A28 2B QD Bushed Pulleys This R4A-ZZ ball bearing isThis 40A28 sprocket is a durable, high quality, and precision A Plate sprocket that is manufactured out of high quality steel. Something else that is notable about this sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #40 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also evenly coated with black oxide, which adds resistance to to the environment and will prevent
