BlackStar 50BS60 2 1/2 K2S - 50 Pitch Finished Bore Sprocket - 60 Tooth - 2-1/2" Bore Polyflex V-Belt The Gates QD10/8V16

The Gates QD10/8V16

"sku":"TB072053759549"

so a 1230M8 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

"mpn":"TB072053763645"

BlackStar 50BS60 2 1/2 K2S - 50 Pitch Finished Bore Sprocket - 60 Tooth - 2-1/2" Bore Polyflex V-Belt The Gates QD10/8V16The BlackStar 50BS60 2 1 2 K2S is a 50 pitch Finished Bore roller chain sprocket with 60 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 1 2" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS60 2 1 2 K2S Chain Pitch 50 Number of Teeth 60 Bore Size 2 1 2" Minimum Bore 1" Maximum Bore 1 15 16" Bore