71915 CD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71915 CD/P4AQBCA
Basic Information
System of measurement
Metric
Weight
1.4 kg
Tolerance class
P4A
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
64 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
21510 lbf
Radial static load rating
33750 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71915 CD/P4AQBCA Bearing Product Overview & Core Advantages
The 71915 CD/P4AQBCA is a precision angular contact ball bearing configured in a Quadruplex Back-to-Back (QBC) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is preloaded to an Extra Light (Class A) specification. Its design is optimized to handle combined loads, providing robust support for complex force scenarios. Manufactured to a P4A tolerance class, it guarantees superior running accuracy, making it an ideal choice for high-performance, high-reliability machinery.
71915 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Bearing series and size designation (75mm bore, 105mm OD). |
| C | 15° contact angle. |
| D | Indicates a modified internal design for optimized performance. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| QBC | Quadruplex Back-to-Back arrangement. Four bearings are matched and mounted in a back-to-back configuration. |
71915 CD/P4AQBCA Bearing Structural Features & Performance Benefits
- High Rigidity and Moment Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely rigid bearing system, capable of withstanding significant moment loads and providing exceptional shaft positioning stability.
- Optimized for Combined Loads: The 15° contact angle effectively supports combined radial and axial loads, making it suitable for complex loading conditions.
- Precision and High-Speed Capability: The P4A tolerance class ensures minimal runout and smooth operation. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 36,000 rpm, reducing centrifugal forces and heat generation.
- Superior Material Construction: Manufactured from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding operating conditions.
71915 CD/P4AQBCA Bearing Typical Application Areas
This bearing is designed for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation
- Advanced Aerospace Systems
- Medical and Dental Equipment Spindles
