FOCUS ON SILENT MOTOR BEARING R&D AND MANUFACTURRING SINCE 1998
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Views: 0 Author: Site Editor Publish Time: 2025-06-04 Origin: Site
Angular contact bearings consist of the following components:
| Component | Function |
|---|---|
| Inner Ring | Fits onto the shaft, with a raceway to support rolling elements. |
| Outer Ring | Mounts in the housing; its raceway is offset to create the contact angle. |
| Rolling Elements | Steel or ceramic balls that transmit loads between rings. |
| Cage | Holds balls in place (made of nylon, brass, or steel). |
| Contact Angle (α) | Critical design parameter. The angle between the load line and radial plane (typically 15°, 25°, or 40°). |
Definition: The angle formed between the line connecting ball-to-raceway contact points and the radial plane.
Impact:
Larger α (e.g., 40°) → Higher axial load capacity.
Smaller α (e.g., 15°) → Better radial load handling.
Radial Load: Transferred from the inner ring to the outer ring via rolling elements.
Axial Load: Due to the contact angle, axial force is decomposed into radial and axial components, both supported by the bearing.
To improve rigidity and load capacity, angular contact bearings are often paired:
| Arrangement | Characteristics | Applications |
|---|---|---|
| Back-to-Back (DB) | Wider outer ring faces outward; high moment rigidity (for cantilever loads). | Machine tool spindles. |
| Face-to-Face (DF) | Narrower outer ring faces inward; better axial rigidity but lower moment resistance. | Pumps, compressors. |
| Tandem (DT) | Same direction; shares axial load for extreme thrust requirements. | Turbines, centrifuges. |
| Feature | Angular Contact Bearing | Deep Groove Bearing |
|---|---|---|
| Load Capacity | Radial + Axial (unidirectional/bidirectional). | Primarily radial. |
| Speed | High (but lower than deep groove). | Higher (lower friction). |
| Precision | High (ABEC-5/P4 common). | Standard (ABEC-1/3). |
| Mounting | Requires preload adjustment (often paired). | Simple (single-unit use). |
Machine Tool Spindles (CNC, grinding machines).
Automotive Wheel Hubs (combined radial + axial loads).
Pumps & Compressors (unidirectional thrust).
Robotic Arms (precision motion control).
Contact Angle (15° / 25° / 40°).
Accuracy Class (ABEC-5, P4, etc.).
Preload (Light/Medium/Heavy).
Material (Steel, hybrid ceramic).
