71907 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71907 CD/HCP4AQBCA
Basic Information
System of measurement
Metric
Weight
0.27 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5738 lbf
Radial static load rating
5850 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71907 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71907 CD/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back (QBC) matched arrangement of four bearings, enabling it to withstand combined radial and axial loads from multiple directions simultaneously. Manufactured to a P4A tolerance class with a 15° contact angle and ceramic balls, it delivers superior high-speed performance, minimal thermal expansion, and long-term operational stability in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 40mm width). |
| CD | Indicates a duplex bearing with specific internal clearance and preload. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes a high-precision tolerance class superior to ABEC 7. |
| QBC | Specifies the Quadruplex Back-to-Back matched arrangement. |
71907 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system capable of supporting significant combined loads and moments. This configuration is ideal for applications where shaft deflection must be minimized.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic cage reduces centrifugal forces and friction, enabling a high limiting speed of 56,000 rpm. The ceramic balls also provide electrical insulation and reduced wear.
- High Precision Operation: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise rotational accuracy.
- Optimized for Preload: The extra light preload (Class A) is applied to eliminate internal clearance, enhancing shaft positioning accuracy and system stiffness without generating excessive heat.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated and is suitable for the specified temperature range from -30°C to 110°C, ensuring immediate installation and reliable initial operation.
71907 CD/HCP4AQBCA Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation Arms
- Aerospace Actuators and Control Systems
- Medical and Dental Drill Handpieces
- Advanced Laboratory and Test Equipment
