China Factory Suppliers of Thrust Angular Contact Ball Bearings for High Axial and Radial Load Performance
Key Features
1. Design and Structure
- Consist of a shaft washer (tight fit to the shaft), a housing washer, and a ball and cage assembly.
- Non-separable design for enhanced structural integrity.
- Asymmetric raceways optimized for axial load transmission while managing radial components.
2. Load Capacity
- Primarily withstand unidirectional axial loads.
- Can accommodate limited radial loads (typically ≤ 20% of axial load capacity).
- High axial rigidity due to the large contact angle (e.g., 60°).
3. Precision and Tolerance
- Manufactured to high-precision grades (P4, P2, or SP/UP for machine tool applications).
- Low noise and vibration levels, suitable for high-precision machinery.
4. Cages
- Glass fiber-reinforced polyamide 66 (suffix TN).
- Machined brass cages (suffix M).
- Stamped steel cages for high-temperature applications.
5. Lubrication
- Pre-lubricated with high-performance grease for lifelong operation (e.g., Krytox® for extreme temperatures).
- Options for oil lubrication in high-speed scenarios.
6. Applications
- Machine tool spindles (e.g., CNC milling machines).
- High-speed robotic systems.
- Aerospace actuators.
- Medical equipment (e.g., MRI scanners).
Technical Specifications
| Contact Angle | 60° (optimized for axial load) |
| Tolerance Grades | P0 (standard), P6, P5, P4, P2 |
| Operating Temperature | -30°C to +150°C (depending on cage and lubricant) |
| Speed Rating | Up to 1.2 million dn value (with oil lubrication) |
Installation Notes
- Must be preloaded (e.g., with springs or matched sets) to eliminate internal clearance.
- Strict alignment required (no self-aligning capability).
- Paired configurations (O or X arrangements) for bidirectional axial load support.
Advantages
Superior axial rigidity compared to standard thrust bearings.
High-speed capability with minimal heat generation.
Extended service life under heavy axial loads.
Frequently Asked Questions
Q
What is the primary load direction this bearing is designed for?
This bearing is designed primarily for unidirectional axial loads. While it can accommodate limited radial loads — typically no more than 20% of its axial load capacity — it is not intended for applications where radial loading is dominant.
Q
What precision grades are available, and which is recommended for machine tool spindles?
Available tolerance grades include P0 (standard), P6, P5, P4, and P2. For machine tool spindle applications requiring the highest accuracy and minimal runout, P4, P2, or SP/UP grades are recommended.
Q
What is the operating temperature range, and what factors affect it?
The standard operating temperature range is -30°C to +150°C. The actual range depends on the cage material and lubricant selected. For extreme temperature environments, Krytox® grease and stamped steel cages are recommended options.
Q
Does this bearing support bidirectional axial loads?
A single bearing supports only unidirectional axial loads. For bidirectional axial load support, bearings must be installed in paired configurations — either O-arrangement (back-to-back) or X-arrangement (face-to-face) — to handle loads from both directions.
Q
Is preloading required during installation?
Yes, preloading is mandatory. It eliminates internal clearance, ensures proper contact between rolling elements and raceways, and maintains axial rigidity during operation. Preloading is typically achieved using springs or matched bearing sets.
Q
What cage materials are available and how do I choose the right one?
Three cage options are available: glass fiber-reinforced polyamide 66 (suffix TN) for general use, machined brass cages (suffix M) for higher speeds and loads, and stamped steel cages for high-temperature environments. Selection depends on operating speed, temperature, and load conditions specific to your application.