BlackStar H41JA18 - 41 Pitch QD Sprocket - 18 Tooth T5R 3/SPB2800 is a banded v-belt

3/SPB2800 is a banded v-belt used on industrial drives - fans and blowers

so a 360L12 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

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3/B138 Banded V-Belt

BlackStar H41JA18 - 41 Pitch QD Sprocket - 18 Tooth T5R 3/SPB2800 is a banded v-beltThe BlackStar H41JA18 is a 41 pitch QD roller chain sprocket with 18 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 requires a QD Type JA Bushing (sold separately). Specifications Part Number H41JA18 Chain Pitch 41 Number of Teeth 18 Maximum Bore 1 1 4" Bore Type QD Hub Style QD Bushing Required QD Type