Product Description
MAST BEARING
Frequently Asked Questions
Q: What is the bore diameter and load rating for mast bearing 55506?
A: Mast bearing 55506 has a 0.875 inch bore diameter and is rated for vertical loads up to 3500 pounds. It uses a sealed roller bearing design suitable for high-cycle mast lift applications on manual pallet jacks.
Q: Which manual pallet jack models use mast bearing 55506?
A: This bearing is compatible with manual pallet jacks from Crown, Hyster, Yale, Raymond, and Linde. It is used in lower mast guide assemblies. Cross-reference your mast assembly part number to confirm fitment.
Q: Why is mast bearing 55506 different from standard bearings 55453 and 55505?
A: Mast bearing 55506 uses roller bearing technology instead of ball bearings to handle higher vertical loads and reduce mast deflection. This design provides smoother lift cycles and longer lifespan under heavy use.
Q: What symptoms indicate mast bearing 55506 needs replacement?
A: Symptoms include grinding or squealing during mast extension, visible mast lean or tilt, increased friction during lift cycles, or visible wear on the bearing raceway. Replace when any of these conditions are present.
Q: What is the expected service life of mast bearing 55506?
A: Under normal warehouse use with regular lubrication, this bearing lasts 4-6 years. High-cycle or heavy-load applications may require replacement every 2-3 years. Contamination and loss of lubrication reduce service life significantly.