Sealed Deep Groove Ball Bearing for Pallet Jacks

Frequently Asked Questions

Q: What is the FM50300004 bearing designed for?
A: The FM50300004 is a sealed deep groove ball bearing assembly for manual pallet jack wheels. It is manufactured from SAE 52100 chrome steel with dual-lip rubber seals and pre-lubrication, designed for reliable performance in warehouse and material handling operations.

Q: What are the FM50300004 dimensions and bore specifications?
A: The FM50300004 has a 20 mm bore diameter, 47 mm outside diameter, and 14 mm thickness. These dimensions fit standard 20 mm bearing bore pallet jack wheels across Crown, Toyota, Raymond, Yale, and compatible equipment brands.

Q: Are the seals on the FM50300004 removable?
A: The FM50300004 features sealed dual-lip rubber seals that cannot be removed during normal service. The seals are integral to the bearing and provide permanent protection against dust, water, and contaminants in warehouse environments.

Q: Is the FM50300004 better than the FM50200001 for wet floors and cold storage?
A: Yes. The FM50300004 dual-lip rubber seals provide superior protection against moisture and contamination compared to the FM50200001 single shield. The FM50300004 is recommended for cold storage, wet floor operations, and environments with frequent cleaning or water exposure.

Q: Can the FM50300004 bearing be relubricated after installation?
A: The FM50300004 is pre-lubricated and designed as a sealed-for-life bearing. The rubber seals prevent external lubrication or regreasing after installation. If the bearing becomes rough or noisy during service, it should be replaced rather than serviced.

Q: What Rockwell hardness rating does the FM50300004 bearing steel provide?
A: The FM50300004 SAE 52100 chrome steel features a minimum Rockwell C60 hardness rating with polished raceways. This hardness specification ensures durability in continuous load cycles typical of warehouse pallet jack operations.