71906 CD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
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71906 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 71906 CD/P4ATBTB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This bearing is supplied as a triplex back-to-back (TBT) matched set, preloaded to Light / Class B specifications, ensuring optimal performance and stability. Its primary advantage lies in its ability to handle combined loads (radial and axial) efficiently while maintaining high precision under demanding conditions. Manufactured to a P4A tolerance class, it is an ideal choice for high-speed spindles and other precision machinery requiring superior running accuracy and high rigidity.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation (Bore: 30 mm, OD: 47 mm, Width: 27 mm) |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class |
| TBT | Triplex Back-to-Back matched arrangement |
| Open | Seal type: Unsealed / Open (requires external sealing) |
71906 CD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement of three bearings creates an exceptionally rigid bearing system, effectively resisting complex moment loads and ensuring precise shaft positioning.
- Superior Load Capacity: The angular contact design with a 15° contact angle is optimized to handle significant combined radial and axial loads simultaneously.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards and featuring a lightweight phenolic cage, this bearing set is engineered for high rotational accuracy and stable operation at high speeds, with a limiting speed of 100,500 rpm.
- Optimized Internal Geometry: With 20 precision balls of 4.762 mm diameter, the bearing provides smooth operation and consistent performance.
- Material Quality: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan.
71906 CD/P4ATBTB Bearing Typical Application Areas
The 71906 CD/P4ATBTB is specifically engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Robotics: High-accuracy robotic arm joints and rotary units.
- Medical Equipment: Dental handpieces and advanced medical imaging devices.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision guidance systems.
