71905 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71905 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71905 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched set delivers superior high rigidity and stability, making it ideal for spindle arrangements. Its P4A tolerance class ensures extremely tight dimensional and running accuracy, while the extra light preload (Class A) minimizes deflection under load for optimal precision. This bearing is pre-lubricated and ready for installation in high-speed, high-precision systems.
71905 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71905: Basic bearing designation (25mm bore, 42mm OD, 18mm width)
- C: 15° contact angle design
- D: Duplex arrangement
- P4A: High precision tolerance class (superior to ABEC 7)
- DB: Back-to-back mounting configuration
- A: Extra light preload classification
71905 CD/P4ADBA Bearing Structural Features & Performance Benefits
This bearing features a phenolic resin cage that provides excellent strength-to-weight ratio and reduced friction at high speeds up to 100,500 rpm. The duplex back-to-back arrangement creates a rigid bearing system capable of withstanding combined loads including radial, axial, and moment loads. The 15° contact angle optimizes axial load capacity while maintaining high-speed capability. Manufactured from chrome steel for both rings and balls, this bearing delivers exceptional durability and fatigue resistance. The open design allows for custom lubrication schemes tailored to specific application requirements.
71905 CD/P4ADBA Bearing Typical Application Areas
The 71905 CD/P4ADBA is specifically engineered for precision applications including:
- Machine tool spindles for milling, grinding, and turning centers
- High-speed machining centers requiring extreme accuracy
- Precision rotary tables and indexing heads
- Medical equipment spindles for dental and surgical tools
- Aerospace positioning systems requiring high rigidity and precision
- Robotic arm joints and precision automation equipment
