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100R21 sprockets are bored to accept a R1 type taper bushing
Hollow Pin I
Sprocket Size: 120A27
Sprocket Size: 100BTB26
Bushing Diameter (D): 0
120BS26 Sprocket With 1-1/4" Finished Bore side plate 100R21 sprockets are bored toThis 120BS26 sprocket features a 1 1 4" finished bore with a key way and two set screws. It is a durable, high quality, and precision sprocket with 26 teeth. Something that is notable about this 120BS26 sprocket is that it fully meets all ANSI Standards, which insures proper contact between the #120 roller chain and sprocket thus preventing premature wear or breakage. This sprocket is also black oxide coated which increases resistance to the
