21628455
Spacer Sleeve
Mack

The spacer sleeve isolates and spaces components within assemblies where precise alignment is essential, such as axles, hubs, or linkage joints. Manufactured to tight bore tolerances, it provides a clean, true round surface for bushings or bearings and helps limit wear caused by misalignment or side loads. Material choice balances strength with weight, supporting efficient operation while reducing vibration transfer. The bore and outer diameter must be matched to the mating components to achieve proper preload and seating, which in turn supports predictable handling and longevity of the connected parts. When replacing, verify correct length and diameter to preserve assembly geometry and load distribution. Proper installation with appropriate lubricants and torques minimizes fretting and corrosion at contact surfaces. Source One Parts Center.