B&B 1VP56X1-1/8 1-Groove 5.35in OD 1-1/8in Bore Variable Pitch Pulley
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The B&B Manufacturing 1VP56X1-1/8 is a new, single-groove variable-pitch V-belt sheave designed for use with 3L, 4L, and A-section V-belts, featuring a 5.35 in outside diameter and a 1-1/8 in finished bore with a standard keyway. Variable-pitch sheaves of this type allow belt speed ratio adjustment without replacing the pulley — the pitch diameter is varied by repositioning the movable flange, enabling fine-tuned speed control in fan, blower, HVAC, and light-duty power transmission applications. Constructed from cast iron with a gray painted finish, the pulley ships new-in-box and is stamped with the part number "1VP56X1-1/8" on the hub face as confirmed in the product photos. The keyed bore ensures positive shaft engagement, and the single-groove profile is dimensionally interchangeable with equivalent 1VP56 series sheaves from other manufacturers.
Product Specifications
| Brand | B&B Manufacturing |
| MPN | 1VP56X1-1/8 |
| Number of Grooves | 1 |
| Outside Diameter | 5.35 in |
| Bore Diameter | 1-1/8 in (1.125 in) |
| Bore Type | Finished Bore w/ Keyway |
| Belt Section Compatibility | 3L, 4L, A |
| Pulley Type | Variable Pitch (VP) |
| Material | Cast Iron |
| Finish | Gray Paint |
| Condition | New |
| Country of Origin | China |