Precision Sealed Ball Bearing Assembly for Pallet Jacks
15H977
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Compatibility
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Reference Diagrams
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Product Description
Precision sealed ball bearing assembly for manual pallet jack load wheels. Features 20 mm bore diameter, 47 mm outer diameter, and 14 mm width. Constructed from high-carbon chromium steel with double-lip rubber seals. ABEC 1 fit class, factory pre-lubricated with lithium grease, suitable for use in 20x47x14 mm load wheel applications.
Specifications
Material
| Material Specification | High-carbon chromium steel |
| Hardness Specification | HRC 60 minimum (raceways and rolling elements) |
Part Numbers
| OEM Part Number | 15H977 |
Frequently Asked Questions
Q: What are the specifications of the 15H977 sealed ball bearing assembly?
A: SKU 15H977 is a precision sealed ball bearing with 20 mm bore diameter, 47 mm outer diameter, and 14 mm width. It features high-carbon chromium steel construction, double-lip rubber seals, ABEC 1 fit class, and is factory pre-lubricated with lithium grease for immediate use in 20x47x14 mm load wheel applications.
Q: Which manual pallet jack models and brands use bearing 15H977?
A: The 15H977 bearing is compatible with manual pallet jacks from Crown, Toyota, Raymond, Yale, and Hyster that use 20x47x14 mm load wheel bearing specifications. Verify your load wheel bore and outer diameter match these dimensions before ordering.
Q: What material specifications and hardness requirements does the 15H977 have?
A: The 15H977 is constructed from high-carbon chromium steel with raceways and rolling elements hardened to a minimum of HRC 60. This hardness provides wear resistance, load capacity, and longevity under the repeated stress cycles of manual pallet jack operation.
Q: What is the expected lifespan of bearing 15H977 in typical service?
A: Under normal warehouse conditions with proper load application, the 15H977 bearing typically lasts several years. Lifespan depends on load intensity, frequency of use, floor conditions, and whether seals remain intact. Premature failure occurs if seals are damaged or bearings are overloaded.
Q: What maintenance does the 15H977 sealed bearing require?
A: The 15H977 is factory pre-lubricated and sealed, requiring minimal maintenance. Inspect seals regularly for damage or grease leakage. Do not attempt to relubricate sealed bearings unless your maintenance protocol specifies this. Replace the bearing if seals fail or internal grinding and noise develop.
Q: What symptoms indicate bearing 15H977 needs replacement?
A: Signs of bearing failure include grinding or rattling noise from the load wheel, rough rotation, visible play or wobble in the wheel assembly, or grease leaking from seals. Any of these conditions indicates the bearing should be replaced to prevent further damage to the load wheel assembly.
