Deep Groove Ball Bearing for Pallet Jacks
BM4-32
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Compatibility
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Product Description
BM4-32 is a single shield deep groove ball bearing designed for use in manual pallet jack load wheel and drive wheel assemblies. Manufactured from AISI 52100 high carbon steel with a cold-formed single metal shield for contaminant resistance, the BM4-32 bearing measures 20.0 mm bore by 47.0 mm outer diameter by 14.0 mm width. The assembly is factory grease-lubricated and rated for high dynamic and static loads, suitable for press-fit applications in pallet truck wheel hubs.
Specifications
Material & Construction
| Cage Material | Steel ribbon cage |
| Hardness | Hardened to Rockwell C58–64 |
Mechanical Specifications
| Shield Configuration | Single metal shield (1Z, single-shielded) |
| Lubrication | Factory-packed light grade grease, sealed for life |
| Dynamic Load Rating | 19.5 kN |
| Static Load Rating | 11.2 kN |
| Maximum Speed | 13,000 RPM (grease lubrication) |
Part Numbers & Compatibility
| Manufacturer Part Number | BM4-32 |
| OEM Part Number | BM4-32 |
Frequently Asked Questions
Q: What are the dimensions and specifications of the BM4-32 deep groove ball bearing?
A: The BM4-32 measures 20.0 mm bore diameter by 47.0 mm outer diameter by 14.0 mm width. It features a single metal shield (1Z configuration) and is manufactured from AISI 52100 high carbon chromium steel with a steel ribbon cage. The bearing is factory-packed with light-grade grease and sealed for life.
Q: What pallet jack applications is the BM4-32 designed for?
A: The BM4-32 is designed for manual pallet jack load wheel and drive wheel assemblies. It is rated for high dynamic and static loads and suitable for press-fit applications in pallet truck wheel hubs. Verify your hub bore diameter matches 20 mm before ordering.
Q: Is the BM4-32 bearing sealed or open?
A: The BM4-32 features a single metal shield (1Z) for contaminant resistance and is factory-packed with light-grade grease sealed for life. The single shield design allows some air circulation while protecting against dust and debris in typical warehouse environments.
Q: What material is the BM4-32 bearing made from?
A: The BM4-32 is manufactured from AISI 52100 high carbon chromium steel with a steel ribbon cage. This material combination provides hardness and durability needed for repetitive load cycles in manual pallet jack wheel assemblies.
Q: How is the BM4-32 installed in pallet jack wheel hubs?
A: The BM4-32 is designed as a press-fit bearing for use in pallet truck wheel hubs or axle assemblies. The bearing comes pre-lubricated and sealed for life, so no additional grease is needed. The 20 mm bore must match your hub or axle diameter.