China Suppliers Thrust Angular Contact Ball Bearings - High Axial Stiffness and Precision Performance from Factory
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
Standard cages include:
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
What is the primary function of angular contact ball bearings?
Angular contact ball bearings are designed primarily to withstand unidirectional axial loads while also accommodating limited radial loads (typically up to 20% of axial load capacity). Their asymmetric raceway design and large contact angle (60°) provide superior axial rigidity.
What precision grades are available for these bearings?
Angular contact ball bearings are manufactured in various precision grades including P0 (standard), P6, P5, P4, and P2. For machine tool applications, higher precision grades such as P4, P2, or SP/UP are commonly used to ensure low noise and vibration levels.
What are the typical applications for angular contact ball bearings?
These bearings are widely used in machine tool spindles (CNC milling machines), high-speed robotic systems, aerospace actuators, and medical equipment such as MRI scanners. They excel in applications requiring high precision, speed, and axial load capacity.
What lubrication options are available?
Angular contact ball bearings come pre-lubricated with high-performance grease (such as Krytox® for extreme temperatures) for lifelong operation. For high-speed applications, oil lubrication is also available and can support speeds up to 1.2 million dn value.
Do these bearings require preloading during installation?
Yes, angular contact ball bearings must be preloaded during installation using springs or matched sets to eliminate internal clearance. Strict alignment is also required as these bearings have no self-aligning capability. Paired configurations (O or X arrangements) are used for bidirectional axial load support.
What is the operating temperature range for these bearings?
The operating temperature range is typically -30°C to +150°C, depending on the cage material and lubricant used. Different cage options (polyamide 66, brass, or stamped steel) are available to suit various temperature requirements.