Click to expand Tap to zoom X-3/4" Hex Bore Weld Hub Sale $30.66 SKU X-3/4HX 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Weld on hubs are often attached to pulleys, sheaves, and sprockets to provide a tapered bore to match the tapered outer surface of the bushing.Type X Weld Hub Bore: 3/4" Outside Diameter: 2 1/2" FREE SHIPPING!!