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100B21H sprockets with a stock bore comes with the standard 1-5/16" inside diameter hole with no keyway or set screws and can be easily machine bored to custom sizes
UCFCS210-30 flange cartridge bearings are designed for circumstances where the bearing is mounted to a surface that is perpendicular to the shaft axis
Our superior UCFBS207-23 bearing with a 1-7/16" bore is equipped with a premium C3 precision insert bearing housed within a high-strength solid-base cast-iron housing
For more information on a three groove 33V300SH sheave
3B64SD Sheave three-groove 6.75" OD 10B Chain Sprockets 100B21H sprockets with a stockThis 3B64SD sheave features three grooves, is 6. 75" in diameter, and is designed to use a SD bushing. QD (quick detachable) style sheaves offer a wider selection of bore sizes versus a standard "fixed" bore style sheave. Also because they are a two component part if one component fails the entire part doesn't need to be replaced. All of our sheaves are manufactured out of an extremely durable cast iron, are dynamically balanced at the factory, and
