Thrust Angular Contact Ball Bearings
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."