71907 CD/P4ADBD
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71907 CD/P4ADBD is a precision angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded to Heavy / Class D specifications, delivering superior stiffness and rotational accuracy. Manufactured to P4A tolerance class, it is engineered to handle combined loads efficiently, making it ideal for high-precision, high-rigidity machinery where minimal deflection is critical.
71907 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
- 71907: Basic designation indicating a metric, angular contact bearing with 35mm bore, 55mm OD, and 20mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- D: Indicates the bearing is supplied as part of a duplex pair.
- P4A: Specifies the tolerance class for ultra-precision applications, ensuring extremely tight dimensional and running accuracy.
- DB: Designates the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability.
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment.
Superior Load Capacity: With a 15° contact angle and heavy preload, this bearing set is engineered to handle significant combined radial and axial loads simultaneously.
Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing offers exceptional running accuracy, low vibration, and smooth operation at high speeds.
Optimized for Demanding Conditions: The chrome steel construction and factory lubrication provide reliable performance within a temperature range of -30°C to 110°C.
71907 CD/P4ADBD Bearing Typical Application Areas
This high-precision duplex bearing set is specifically designed for applications requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles (high-speed milling, grinding, and turning centers)
- Precision Gearboxes and transmission systems
- Industrial Robotics and automation equipment
- Medical Equipment (high-speed dental handpieces, imaging systems)
- Aerospace Actuation Systems and instrumentation
