BlackStar 40BS37 1 1/8 K2S - 40 Pitch Finished Bore Sprocket - 37 Tooth - 1-1/8" Bore 3.5/8" 250-S8M-2032 is a standardized industry

250-S8M-2032 is a standardized industry size

so a 2/3VX300 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

"text": "150L100US is a timing belt used on positive

so the Megadyne 5/8V2000 interchanges with Gates

The 3/B133 is a banded v-belt from D&D Global's Dura-Prime Band Classical - B Series line

BlackStar 40BS37 1 1/8 K2S - 40 Pitch Finished Bore Sprocket - 37 Tooth - 1-1/8" Bore 3.5/8" 250-S8M-2032 is a standardized industryThe BlackStar 40BS37 1 1 8 K2S is a 40 pitch Finished Bore roller chain sprocket with 37 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 1 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 40BS37 1 1 8 K2S Chain Pitch 40 Number of Teeth 37 Bore Size 1 1 8" Minimum Bore 5 8" Maximum Bore 1 1 2" Bore