Product Description
Cup, bearing
Specifications
Product Overview
| Product Type | Tapered Roller Bearing Cup |
Physical Specifications
| Material Composition | Alloy steel, precision-forged and heat-treated |
| Raceway Surface | Polished and hardened to resist wear and deformation |
| Standard Clearance | 0.001 to 0.005 inches with mating cone |
| Bearing Type | Tapered roller (outer ring/cup component) |
Compatibility
| Application | Electric lift truck mast and axle assemblies |
| Compatible Equipment | Crown, Toyota, Jungheinrich, BT, and similar electric lift truck manufacturers |
| Replacement Method | Must be replaced as matched set with bearing cone |
Frequently Asked Questions
Q: What is a bearing cup and how does it function in electric lift trucks?
A: The bearing cup SKU 41-23373 is the stationary raceway that holds the rolling elements (balls or rollers) and is pressed into the mast sleeve or axle housing of electric lift trucks. It pairs with a cone to form a complete tapered roller bearing assembly. The cup surface carries the load and must be perfectly smooth and free from rust or damage.
Q: Which electric lift truck models use the 41-23373 bearing cup?
A: The 41-23373 bearing cup is designed for electric lift trucks from Crown, Toyota, Jungheinrich, BT, and similar OEM manufacturers. This cup supports vertical mast loads in multi-stage or single-stage masts. Verify the bore diameter and cup outside diameter against your equipment manual. Do not assume all bearing cups are interchangeable across models.
Q: Can the bearing cup be replaced separately from the bearing cone?
A: Bearing cups and cones are typically replaced as a matched set. Using a new cup with an old, worn cone or vice versa causes rapid failure and poor load distribution. If your bearing shows wear, replace both the cup and cone together. This ensures proper geometry and load rating.
Q: What material is the 41-23373 bearing cup made from?
A: The bearing cup is precision-forged from alloy steel and hardened through heat treatment to resist wear and deformation under heavy mast loads. The raceway surface is polished and inspected for surface finish to ensure smooth rolling contact. This material composition handles thermal cycling and moisture exposure in warehouse environments.
Q: How do I diagnose bearing cup failure in an electric lift truck?
A: A failing bearing cup produces grinding noise during mast extension and retraction, lateral mast movement or wobble, and uneven pressure when the mast is locked. Inspect the cup raceway for spalling, pitting, or visible rust. Replace the cup and cone assembly immediately if these symptoms appear to prevent total mast failure.
Q: How does the 41-23373 bearing cup maintain proper clearance with its mating cone?
A: The bearing cup and cone are designed with precision tolerances to maintain proper preload and radial clearance. This clearance is typically 0.001 to 0.005 inches and is preset during assembly. Do not attempt to adjust clearance manually. If preload is incorrect, the entire bearing set must be replaced to restore proper function.