71807 CD/P4QBCC
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71807 CD/P4QBCC
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2722 lbf
Radial static load rating
3892 lbf
Limiting speed
56 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
Moderate / Class C
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
71807 CD/P4QBCC Bearing Product Overview & Core Advantages
The 71807 CD/P4QBCC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This bearing is supplied as a Quadruplex Back-to-Back (QBC) matched set, delivering superior stability and the ability to handle complex combined loads, including significant radial and axial forces. Manufactured to a P4 tolerance class, it ensures minimal runout and high rotational accuracy, making it ideal for high-speed spindles and precision machinery where reliability is paramount.
71807 CD/P4QBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71807 CD/P4QBCC provides detailed technical specifications:
- 71807: Basic bearing series, indicating a high-precision angular contact design with a 35mm bore.
- CD: Indicates a specific internal design with a 15° contact angle and Moderate preload (Class C).
- P4: Denotes the tolerance class, signifying very high dimensional and running accuracy.
- QBCC: Specifies the matched arrangement as a Quadruplex Back-to-Back (QBC) set. The suffix confirms the bearings are supplied as a pre-matched group of four for optimal performance.
71807 CD/P4QBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined loads and moments. The 15° contact angle is optimized for supporting substantial axial loads in both directions.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 56,000 rpm. The open design allows for efficient lubrication management essential for high-speed operation.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees precise shaft positioning and smooth, vibration-free rotation.
- Matched Set Performance: Supplied as a pre-matched set of four, these bearings are engineered to work in unison, ensuring uniform load distribution and simplified installation for complex spindle designs.
71807 CD/P4QBCC Bearing Typical Application Areas
This high-precision bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, semiconductor manufacturing, and optical lens grinding.
- High-Frequency Motors: Where high rotational accuracy and rigidity are required.
- Robotic and Automation Systems: For high-accuracy rotary joints and arms.
