71802 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Ball & Washer Dimensions
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71802 CD/P4DBA Bearing Product Overview & Core Advantages
The 71802 CD/P4DBA is a duplex back-to-back pair of precision angular contact ball bearings designed for the most demanding applications. This P4 tolerance class matched set delivers exceptional rotational accuracy and high rigidity, enabling superior performance under combined radial and axial loads. The phenolic cage and optimized internal geometry contribute to outstanding high-speed capabilities, making it an ideal solution for machine tool spindles and other precision machinery requiring maximum stability and running accuracy.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71802 | Basic bearing designation | 15mm bore, 24mm OD, 10mm width angular contact bearing |
| C | 15° contact angle | Optimized for axial load capacity while maintaining radial performance |
| D | Duplex arrangement | Two bearings supplied as a matched pair |
| DB | Back-to-Back mounting | Provides high moment rigidity and excellent misalignment compensation |
| P4 | Tolerance class | High precision grade for applications requiring minimal runout and vibration |
| A | Extra light preload | Minimal internal clearance for optimal stiffness at high speeds |
71802 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread between bearing centers, significantly increasing moment stiffness and resistance to tilting moments. This configuration enables the bearing set to handle substantial combined loads (radial and axial in both directions) while maintaining precise shaft positioning.
Precision Performance: Manufactured to P4 tolerance class standards, these bearings exhibit extremely tight dimensional and running accuracy tolerances. The 15° contact angle provides an optimal balance between radial and axial load capacity, while the extra light preload (Class A) ensures minimal deflection under operational conditions.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high rotational speeds. With a limiting speed of 95,000 rpm, this bearing set is engineered for demanding high-speed applications where centrifugal forces and friction must be minimized.
Enhanced Durability: Constructed from chrome steel for both rings and balls, the bearing provides consistent performance across the operating temperature range of -30°C to 110°C. The open design allows for customized lubrication schemes to match specific application requirements.
71802 CD/P4DBA Bearing Typical Application Areas
The 71802 CD/P4DBA precision matched bearing set is specifically designed for applications requiring exceptional accuracy, rigidity, and high-speed performance:
- Machine tool spindles for milling, grinding, and turning operations
- High-frequency motor spindles in precision manufacturing
- Precision instrumentation and measuring equipment
- Robotic arm joints and precision automation systems
- Medical device components requiring high rotational accuracy
- Aerospace control systems and auxiliary power units
