Product Description
CUP, BEARING
Specifications
Product Overview
| Part Number | 28700-309 |
Physical Specifications
| Component Type | Tapered Roller Bearing Cup |
| Material | Hardened steel |
| Function | Outer raceway for tapered roller bearing assembly; provides load support and rolling element guidance |
| Condition | New |
Compatibility
| Application | Manual pallet jack wheel assemblies, axle bearing systems |
Frequently Asked Questions
Q: What is a bearing cup and what does the 28700-309 do?
A: A bearing cup is the outer raceway component of a tapered roller bearing assembly. The 28700-309 cup bearing is a wear component that supports and guides the rolling elements within the bearing system used in manual pallet jack wheels and load mechanisms.
Q: What manual pallet jack models use the 28700-309 bearing cup?
A: The 28700-309 bearing cup is compatible with manual pallet jacks from major OEM brands including Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, Linde, Clark, Mitsubishi, CAT, and BT. Verify the exact model and serial range against your equipment documentation to confirm fitment.
Q: What are signs that the 28700-309 bearing cup needs replacement?
A: Symptoms of bearing cup wear include grinding or rough noise during wheel rotation, loose or rattling movement in the wheel assembly, difficulty raising or lowering the load, and uneven wheel wear. If you observe these symptoms, inspect the bearing cup for spalling, pitting, or discoloration.
Q: What is the typical maintenance schedule for bearing cup assemblies like the 28700-309?
A: Bearing cups do not require routine maintenance but should be inspected annually or after 2000 operating hours for wear and damage. Environmental factors like wet conditions and high-frequency use can accelerate wear. Replace the bearing cup if you observe any internal damage or excessive play in the assembly.