BlackStar DS80A18H 2 7/16 K2S - Double-Single 80 Pitch A-Plate Sprocket - 18 Tooth - 2-7/16" Bore TL5040 v=1673992075"

v=1673992075"

so a 3/BX87 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

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v=1698988066"

com/products/d-and-d-1250k2-micro-v-belt"

BlackStar DS80A18H 2 7/16 K2S - Double-Single 80 Pitch A-Plate Sprocket - 18 Tooth - 2-7/16" Bore TL5040 v=1673992075"The BlackStar DS80A18H 2 7 16 K2S is a 80 pitch double single strand A Plate roller chain sprocket with 18 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 7 16" bore and is ready for immediate installation. Specifications Part Number DS80A18H 2 7 16 K2S Chain Pitch 80 Number of Teeth 18 Bore Size 2 7 16" Bore Type Plain Bore Hub Style A Plate Strand