Product Description
Mast bearing
Frequently Asked Questions
Q: What is SKU 306SZZ-5 and what is it used for?
A: SKU 306SZZ-5 is a mast bearing designed for forklift mast columns. This bearing supports the weight of the mast assembly and enables smooth vertical travel of the lift mechanism. It is compatible with electric and internal combustion forklifts from major manufacturers including Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, and Linde.
Q: What are the specifications for the 306SZZ-5 mast bearing?
A: The 306SZZ-5 designation indicates a 6 mm bore bearing with double shielded (ZZ) sealing. The bearing is designed to handle vertical loads typical of mast column applications. Exact outside diameter and width specifications should be verified against your forklift mast manufacturer documentation to confirm proper fitment.
Q: What does the double shielded (ZZ) design mean?
A: Double shielded (ZZ) means the bearing has metal shields on both sides to exclude dirt and contaminants while allowing the bearing to run with minimal drag. This design is ideal for forklift mast applications where the bearing is exposed to warehouse dust, moisture, and vibration but does not require direct contact sealing.
Q: How often should the 306SZZ-5 mast bearing be replaced?
A: Mast bearing lifespan depends on forklift usage intensity, maintenance practices, and environmental conditions. Under normal warehouse operation, expect 2 to 4 years between replacements. Inspect bearings during regular mast maintenance. Signs of wear include grinding noise from the mast column or resistance during lift cycles.
Q: What are symptoms of a failing mast bearing?
A: Common failure indicators include grinding or squealing noise when raising or lowering the mast, mast wobble or lateral movement, increased effort required to operate the lift mechanism, or visible wear on the mast column. Worn mast bearings can cause instability and safety hazards. Replace promptly when these symptoms appear.