71907 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71907 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71907 ACD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stiffness and moment load capacity, making it ideal for high-precision spindles and machinery. The bearing is pre-lubricated and features a P4A tolerance class for exceptional running accuracy, ensuring reliable performance in high-speed and high-precision environments.
71907 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Bearing series and size designation |
| AC | Angular Contact design with 25° contact angle |
| D | Duplex arrangement (two bearings) |
| DB | Back-to-Back mounting configuration |
| P4A | High precision tolerance class |
71907 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The duplex back-to-back arrangement creates a wide effective spread between bearing centers, significantly increasing system stiffness and resistance to moment loads. This configuration is essential for applications requiring minimal deflection under heavy cutting forces or other operational stresses.
Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, contributing to superior surface finishes and machining accuracy. The 25° contact angle provides optimal balance between radial and axial load capacity.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's impressive limiting speed of 56,000 rpm. This makes it suitable for high-speed machining applications.
Optimized Load Distribution: With 21 precision balls of 5.556mm diameter, the bearing provides even load distribution and smooth rotation, enhancing service life and reliability under demanding conditions.
71907 ACD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is specifically designed for applications requiring exceptional accuracy and rigidity:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Grinding Spindles - Applications demanding micron-level accuracy
- High-Speed Machining Centers - Where minimal thermal growth and high rigidity are critical
- Industrial Robotics - Precision rotary joints and arm linkages
- Aerospace Manufacturing Equipment - High-precision machining of critical components
