71804 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71804 CD/P4DBA Bearing Product Overview & Core Advantages
The 71804 CD/P4DBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched pair configuration enables superior performance in handling combined loads—simultaneously managing radial forces and axial loads from both directions. Manufactured to P4 tolerance class with an extra light preload, it delivers high running accuracy, excellent high-speed capability, and optimal stiffness for the most demanding precision machinery and spindle applications.
71804 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
- 71804: Basic bearing designation indicating size series and bore diameter (20mm)
- C: 15° contact angle design
- D: Duplex arrangement (two bearings mounted together)
- P4: High precision tolerance class (superior to ABEC-7)
- DB: Back-to-back mounting configuration
- A: Extra light preload classification
71804 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back arrangement creates a rigid bearing system that effectively resists moment loads and provides stable support for rotating components. With a 15° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads in both directions.
Precision Performance: Manufactured to P4 tolerance class standards, this bearing ensures minimal runout and vibration, making it ideal for high-precision applications. The extra light preload (Class A) eliminates internal clearance while maintaining smooth operation at high speeds.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at the specified limiting speed of 100,500 rpm. The lightweight construction reduces centrifugal forces, enhancing high-speed performance.
Material Excellence: Constructed from chrome steel for both rings and balls, this bearing offers superior hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71804 CD/P4DBA Bearing Typical Application Areas
The 71804 CD/P4DBA excels in applications requiring high precision and high-speed operation:
- Machine tool spindles for milling, grinding, and turning centers
- High-frequency motor spindles and precision electric motors
- Industrial pumps and compressors requiring precise shaft positioning
- Precision instruments and measuring equipment
- Robotic joints and automation equipment
- Aerospace components and navigation systems
