Replacement Bearing Cup for Manual Pallet Jack Wheels

Frequently Asked Questions

Q: What is the 31098-1 bearing cup specification?
A: The 31098-1 is a replacement bearing cup machined from SAE 52100 steel with Rockwell hardness C58-C64. It is compatible with 6204 size bearings (20 mm ID x 47 mm OD x 14 mm width) and designed for press fit installation.

Q: Which pallet jack models use the 31098-1 bearing cup?
A: The 31098-1 is engineered for manual pallet jack load wheels that require 6204 size bearing installations. Verify your equipment bearing size and wheel type before ordering.

Q: What makes SAE 52100 steel the right material for this bearing cup?
A: SAE 52100 steel is a high-strength, bearing-grade material that is hardened and precision-ground to maintain tight tolerances. This ensures proper bearing fit, reduced play, and extended wear life under load.

Q: Why is the Rockwell hardness C58-C64 critical for bearing performance?
A: This hardness range provides adequate strength to resist deformation under load while maintaining enough toughness to avoid brittleness and premature cracking. It is the industry standard for bearing race materials.

Q: How long does a bearing cup like the 31098-1 last?
A: Properly installed and maintained bearing cups typically last the lifetime of the pallet jack. Failures occur when corrosion, contamination, or improper bearing clearance creates race degradation. Regular inspection is recommended.