71817 CD/P4QBCA
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71817 CD/P4QBCA
Basic Information
System of measurement
Metric
Weight
1.06 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
30
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12870 lbf
Radial static load rating
22950 lbf
Limiting speed
28 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
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71817 CD/P4QBCA Bearing Product Overview & Core Advantages
The 71817 CD/P4QBCA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As part of a Quadruplex Back-to-Back (QBC) matched set, this bearing is engineered to handle complex combined loads, including high radial loads and significant axial loads in both directions. Manufactured to a P4 tolerance class and featuring an extra light preload (Class A), it ensures smooth, high-speed operation with minimal vibration, making it ideal for high-precision, high-reliability machinery.
71817 CD/P4QBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71817 | Basic bearing designation, indicating a metric, angular contact bearing with an 85 mm bore, 110 mm OD, and 52 mm width. |
| CD | Indicates a specific internal design and contact angle (15°), optimized for high rigidity and precise operation. |
| P4 | The tolerance class, signifying very high dimensional and running accuracy for precision applications. |
| QBCA | Denotes the bearing is one of four in a Quadruplex Back-to-Back (QBC) matched set with an Extra light preload (Class A) applied. |
71817 CD/P4QBCA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement provides exceptional system stiffness, enabling the bearing set to withstand heavy combined loads and moments. The 15° contact angle is optimized for supporting significant axial loads.
- Precision & High-Speed Performance: Manufactured to P4 tolerance standards, this bearing guarantees minimal runout and vibration. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 28,000 rpm.
- Superior Material & Construction: Made from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The open seal type allows for custom lubrication solutions to match specific operational needs.
- Preload & Matched Set: The extra light preload (Class A) eliminates internal clearance, enhancing shaft positioning accuracy and system stability without generating excessive heat at high speeds.
71817 CD/P4QBCA Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications requiring maximum rigidity and speed, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes & Drive Systems: Where accurate shaft positioning is critical.
- High-Frequency Motors and Spindles: Demanding low vibration and high rotational accuracy.
- Industrial Pumps and Compressors: For handling significant radial and axial loads.
