BlackStar H80BS21 1 3/8 K2S - 80 Pitch Finished Bore Sprocket - 21 Tooth - 1-3/8" Bore BlackStar com/products/gates-1760m20-micro-v-belt"

com/products/gates-1760m20-micro-v-belt"

so the 16/B128 interchanges with Gates 16/B128

The 3V500 is used for high-power industrial drives

"name":"Gates 360H150 PowerGrip Timing Belts"

7/8" Bore Type 1

BlackStar H80BS21 1 3/8 K2S - 80 Pitch Finished Bore Sprocket - 21 Tooth - 1-3/8" Bore BlackStar com/products/gates-1760m20-micro-v-belt"The BlackStar H80BS21 1 3 8 K2S is a 80 pitch Finished Bore roller chain sprocket with 21 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 3 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H80BS21 1 3 8 K2S Chain Pitch 80 Number of Teeth 21 Bore