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BlackStar 100R54 - 100 Pitch R Sprocket - 54 Tooth P5M com/products/diesel-belting-9pk1335-micro-v-micro-v-belt"The BlackStar 100R54 is a 100 pitch R roller chain sprocket with 54 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Requires a Split Taper Bushing (sold separately). Specifications Part Number 100R54 Chain Pitch 100 Number of Teeth 54 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Outside Diameter 22. 21" Pitch Diameter 21. 498" Approx. Weight 69. 000