51101 is a thrust ball bearing for axial loads only. Deep groove ball bearings (e.g. 608, 688) primarily handle radial loads with some axial capacity. Different applications — not interchangeable.
51101 Single-direction Thrust Ball Bearing
51101 is a metric single-direction thrust ball bearing. Common size 12x26x9mm. Separable design with shaft washer, housing washer and ball/cage assembly. Supports axial loads in one direction only — for low to medium speed applications.
Specifications
| Model | 51101 |
|---|---|
| Size | 12x26x9mm (bore x OD x height) |
| Shaft Washer OD | ~26mm |
| Housing Washer ID | ~13mm |
| Series | Metric single-direction thrust ball bearing, 51 series |
| Material | GCr15 bearing steel |
| Sealing | Open (no seals) |
| Cage Material | Pressed steel / polyamide |
| Structure | Separable (shaft washer, housing washer, ball/cage assembly) |
| Load Direction | Axial only (single direction) — do not apply radial loads |
| Applications | Machine tool lead screws, jacks, turntables, clutches, low-speed axial load machinery |
Selection Notes
- 51101 supports axial load in ONE direction only. Never apply radial loads.
- The shaft washer mounts on and rotates with the shaft; the housing washer sits stationary in the housing. Correct orientation is critical.
- Separable design: the three components can be separated during transport and installation — reassemble in correct order.
- Use within suitable thrust-bearing operating conditions and provide application details before ordering.
- If bidirectional axial loads or radial loads are present, use angular contact bearings or double-direction thrust bearings instead.
Before Ordering
51101 is generally handled under the GCr15 bearing steel and standard precision confirmation scope. When ordering, please provide axial-use conditions, mating shaft and housing bore information, material direction, and document requirements (RoHS/REACH etc.).
FAQ
The axial load capacity of 51101 should be confirmed against the actual product scope, load direction, speed, mounting method and order requirements. Please provide working conditions when inquiring.
Thrust ball bearings are not designed for high-speed operation. Actual operating speed should be confirmed according to load, lubrication, mounting conditions and the specific product scope.