71907 CD/P4AQGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71907 CD/P4AQGB
Basic Information
System of measurement
Metric
Weight
0.3 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
Universal Matchable (SU)
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71907 CD/P4AQGB Bearing Product Overview & Core Advantages
The 71907 CD/P4AQGB is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it is optimized to handle combined loads (simultaneous radial and axial loads) efficiently. Its universal matchable (SU) design allows for flexible mounting configurations in sets, enabling simplified preload control and achieving superior system stiffness. This bearing is pre-lubricated and features a phenolic cage, making it an ideal solution for high-speed, high-reliability machinery.
71907 CD/P4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 40mm width). |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial loads. |
| D | Indicates a light preload (Class B), enhancing rigidity and minimizing deflection under operational loads. |
| P4A | Specifies the high-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| QG | Denotes the use of a phenolic (polyamide) cage, which is lightweight and suitable for high-speed applications. |
| B | Indicates the bearing is supplied with a standard lubricant suitable for the specified temperature range. |
71907 CD/P4AQGB Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance standards with a light preload, this bearing provides exceptional running accuracy and system stiffness, crucial for minimizing vibration and deflection in precision spindles.
- Superior Load Capacity: The angular contact design with a 15° contact angle is engineered to handle combined radial and axial loads simultaneously, making it highly versatile for complex loading conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage (QG) reduces centrifugal forces, while the optimized internal geometry and pre-lubrication contribute to a high limiting speed of 56,000 rpm.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be mounted in various preloaded arrangements (back-to-back, face-to-face, or tandem) with other identical bearings, offering design flexibility and simplified assembly.
- Durable Material Construction: Made from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational life under demanding conditions.
71907 CD/P4AQGB Bearing Typical Application Areas
The 71907 CD/P4AQGB is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles, and robotics.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging devices.
- Industrial Pumps & Compressors: For applications requiring high rotational accuracy and reliability.
