BlackStar H40JA18 - 40 Pitch QD Sprocket - 18 Tooth Super HC Molded Notch 20/3V920 is a banded v-belt

20/3V920 is a banded v-belt used on industrial drives - fans and blowers

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The Gates AK184 1 Light Duty Sheaves - Bored-to-Size 78052801 is a V-belt sheave (pulley) from Gates Corporation

BlackStar H40JA18 - 40 Pitch QD Sprocket - 18 Tooth Super HC Molded Notch 20/3V920 is a banded v-beltThe BlackStar H40JA18 is a 40 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 H40JA18 Chain Pitch 40 Number of Teeth 18 Maximum Bore 1" Bore Type QD Hub Style QD Bushing Required QD Type JA