Product Description
BEARING CUP
Frequently Asked Questions
Q: What is a bearing cup and why does the ME BM5-31 matter?
A: A bearing cup is the outer stationary raceway that contains rolling elements (balls or rollers). The ME BM5-31 cup is a tapered roller bearing outer race for electric lift truck wheel or drive shaft applications. The cup matches a tapered bearing cone and must be installed as a matched set for proper load distribution and bearing life.
Q: Which electric lift truck models use the ME BM5-31 bearing cup?
A: The ME BM5-31 is compatible with drive wheel assemblies on electric pallet jacks and reach trucks from Crown, Toyota, Raymond, Yale, Hyster, and Jungheinrich. Confirm your equipment model and wheel bore diameter before ordering, as cup cavity sizes vary by manufacturer.
Q: What is the bore diameter of the ME BM5-31 bearing cup?
A: The bore and outside dimensions depend on the tapered bearing set design. Request the detailed specification sheet or provide your equipment model and wheel assembly number for exact measurements. Incorrect cup bore diameter will cause improper fit and premature bearing failure.
Q: Must the ME BM5-31 be replaced as part of a bearing set?
A: Yes. The bearing cup must be replaced with a matching tapered bearing cone. Reusing an old cone with a new cup, or vice versa, will result in uneven rolling contact, premature wear, and wheel lockup. Always replace cups and cones as a matched set.
Q: How can I tell if the ME BM5-31 bearing cup needs replacement?
A: Replace the bearing cup if the wheel makes grinding or rumbling noise during operation, the wheel feels rough when spun by hand, or you observe visible pitting or spalling on the cup raceway surface. A damaged cup cannot be repaired and must be replaced with a new matched set.
Q: Is there a cross-reference for the ME BM5-31 bearing cup?
A: Cross-reference numbers depend on the tapered bearing design and OEM supplier. The ME prefix indicates our house brand equivalent. Contact us with your equipment manufacturer, model number, and current bearing part number for cross-reference information.