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The Martin 50BTB21H is a bushing bore roller chain sprocket made from steel material. It features a taper locking design suitable for standard roller chain applications. This sprocket has twenty-one teeth and is compatible with a chain number of fifty with a pitch of five-eighths of an inch.
This sprocket uses a hardened taper bushing that creates a secure grip on the shaft when installed. It meets ANSI standards and features precise machining for quality and consistency.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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