71915 CD/PA9ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71915 CD/PA9ADBC
Basic Information
System of measurement
Metric
Weight
0.7 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13162 lbf
Radial static load rating
16875 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71915 CD/PA9ADBC Bearing Product Overview & Core Advantages
The 71915 CD/PA9ADBC is a precision duplex angular contact ball bearing set, engineered for applications demanding high rigidity and exceptional running accuracy. This matched back-to-back (DB) arrangement is preloaded to Moderate / Class C, providing superior stability and minimizing axial and radial runout. Its design is optimized to handle combined loads, including significant radial loads and bidirectional axial thrust, making it an ideal choice for high-precision, high-reliability spindles and machinery where operational integrity is critical.
71915 CD/PA9ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CD | Duplex Back-to-Back arrangement with Moderate Preload (Class C) | Provides high system rigidity and excellent moment load capacity. |
| PA9A | High precision tolerance class | Ensures minimal runout and smooth, quiet operation for demanding applications. |
| DBC | Specific manufacturer designation for this matched set configuration. | Guarantees optimized performance as a factory-matched pair. |
71915 CD/PA9ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement and preload create a rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment.
- Superior Load Capacity: With a 15° contact angle and a high ball count of 26, this bearing is engineered to handle significant combined radial and bidirectional axial loads simultaneously.
- Optimized for High-Speed Operation: The lightweight phenolic cage reduces centrifugal forces, contributing to stable performance at the high limiting speed of 36,000 rpm. The bearings are pre-lubricated for immediate operation.
- Precision Performance: Manufactured to the stringent PA9A tolerance class with tight bore and outside diameter tolerances, this bearing guarantees high running accuracy and minimal vibration.
71915 CD/PA9ADBC Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance applications, including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Spindle Motors
- Precision Gearboxes and Transmission Systems
- High-Speed Pumps and Compressors
