71907 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71907 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71907 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set delivers superior performance under combined loads, efficiently handling radial and axial forces simultaneously. Manufactured to P4A tolerance class with an extra light preload (Class A), it ensures minimal runout and stable operation in high-precision systems. Its compact design, featuring a 35 mm bore and 55 mm outside diameter, makes it an ideal choice for high-speed spindles and other precision machinery where space is at a premium and reliability is critical.
71907 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series, indicating a high-precision angular contact design with a 35mm bore, 55mm OD, and 20mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications with moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings supplied as a matched set). |
| DB | Specifies the Back-to-Back arrangement of the matched pair, which provides high moment rigidity. |
| P4A | Denotes an ultra-high precision tolerance class, with enhanced dimensional and running accuracy exceeding ABEC 7 standards. |
71907 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional positional accuracy.
- Superior Load Capacity: The angular contact design with a 15° contact angle allows the bearing to handle significant combined radial and axial loads simultaneously, making it suitable for complex loading conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 56,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore and outside diameter tolerances, this bearing guarantees low vibration, smooth operation, and extended service life in precision applications.
- Preloaded Configuration: The extra light preload (Class A) eliminates internal clearance, enhancing shaft rigidity and rotational accuracy from startup without generating excessive heat.
71907 CD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is engineered for applications where maximum accuracy, speed, and rigidity are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Medical Equipment: High-speed dental handpieces and surgical tools.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation instruments.
