Product Description
Mast bearing
Frequently Asked Questions
Q: What type of equipment uses a mast bearing like SKU 971007?
A: Mast bearings support the vertical mast assembly in lift trucks, including both manual and electric pallet jacks, electric hand jacks, and some stacker models. They provide the pivot and load support where the mast connects to the base carriage.
Q: What operating conditions should be considered when replacing a mast bearing?
A: Mast bearings experience both radial and thrust loads during normal material handling cycles. They must tolerate lateral forces from uneven loads and provide smooth articulation during mast extension and retraction across temperature ranges typical of warehouse and dock environments.
Q: How can you determine if a mast bearing needs replacement?
A: Common failure symptoms include grinding or rough rotation in the mast assembly, lateral play or looseness when rocking the mast side-to-side, or visible scoring on the bearing races. If the mast tilts unevenly or the jack does not return to center after tilting, bearing wear may be the cause.
Q: What material is typically used in mast bearing construction?
A: Standard mast bearings use hardened alloy steel races and precision-ground rolling elements. Most are rated ABEC 1 or ABEC 3 precision grade and feature either single or double shields or seals for contaminant protection in warehouse environments.