Deep Groove Ball Bearing for Pallet Jacks

Frequently Asked Questions

Q: What are the specifications of the 6306-DDU bearing assembly?
A: The 6306-DDU is a deep groove ball bearing with 30 mm bore, 72 mm outside diameter, and 19 mm width. It features rubber seals on both sides (DDU configuration) with pressed steel cage construction and high carbon chromium steel material.

Q: Is the 6306-DDU interchangeable with the 6306-2RS or 306PP?
A: Yes, the 6306-DDU is fully interchangeable with both 6306-2RS and 306PP bearings for manual pallet jack wheel replacement. All three share identical 30 mm x 72 mm x 19 mm dimensions and are rated for the same load applications.

Q: What internal clearance rating does the 6306-DDU have?
A: The 6306-DDU is rated with CN (normal) internal clearance, which is the standard specification for general-duty manual pallet jack wheel assemblies. This clearance rating ensures proper fit and operation across most Crown, Toyota, Raymond, and equivalent brand equipment.

Q: How do the rubber seals on the 6306-DDU differ from the neoprene shields on the 6306-2RS?
A: The 6306-DDU uses rubber seals (DDU type) that provide contact sealing on both sides, which offers superior contamination protection compared to the non-contact neoprene double shields (2RS type) on the 6306-2RS. Choose the DDU for wet or heavily contaminated environments.

Q: What is the material composition of the 6306-DDU cage and balls?
A: The 6306-DDU features high carbon chromium steel balls and a pressed steel cage. This construction provides durability and resistance to wear in repeated load cycling typical of manual pallet jack wheel rotation during material handling operations.

Q: What bearing types does the 6306-DDU replace or supersede?
A: The 6306-DDU replaces and supersedes the 6306-2RS and 306PP bearing types for manual pallet jack applications. Use this SKU as a direct replacement when maintenance or repair is required on equipment currently equipped with either of these part numbers.