Application and Function

SKF 456301 is a bearing spacer engineered for heavy-duty wheel-end assemblies in commercial truck and trailer axles. Installed between opposing wheel bearings, it provides a fixed, machined distance to help maintain proper bearing preload and alignment. The component is part of the wheel-end bearing and seal system, serving as a dimensional spacer rather than a rolling element. Distributors classify this part for demanding service conditions typical of fleet and vocational applications where consistent bearing positioning supports predictable wheel-end performance.

Dimensions and Integration

The spacer’s defined geometry enables reliable system stack-up within compatible hubs and bearing sets: 2.629 in inner diameter, 4.000 in outer diameter, and 0.75 in overall width, with a listed depth of 0.25 in and a minor width of approximately 0.237 in. Its machined metal construction supports dimensional stability under clamp loads common to heavy-duty wheel ends, aiding repeatability during assembly and service. As an OEM SKF component offered in the commercial vehicle aftermarket, it is intended to integrate with SKF wheel-end solutions and related sealing components. Always verify axle/hub application and dimensions against OE or catalog data prior to installation.