71907 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71907 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.074 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.007mm to 0
Width
10 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° to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1474 lbf
Limiting speed
40 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 278.67
/ each
In Stock
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71907 CD/P4A Bearing Product Overview & Core Advantages
The 71907 CD/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Manufactured to P4 (ABEC-7) tolerance class, it offers exceptional dimensional stability and rotational precision. Its key advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and precision machinery where high rigidity and minimal runout are critical. The phenolic cage and optimized contact angle of 15° contribute to its excellent high-speed performance.
71907 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation indicating a high-precision angular contact bearing series with a 35mm bore, 55mm OD, and 10mm width. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high rigidity and matched preload when used in pairs. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy for precision applications. |
71907 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 15° contact angle provides high resistance to deflection under load. Manufactured to P4 tolerance, it guarantees exceptional running accuracy and dimensional stability, which is crucial for machine tool spindles.
- Superior Load Capacity: Engineered to support significant combined radial and axial loads in one direction, with a dynamic load rating of 2194 lbf and a static load rating of 1474 lbf.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the open design and pre-lubrication allow for efficient operation at high rotational speeds, with a limiting speed of 40,000 rpm.
- Precision Components: Constructed from chrome steel for both rings and balls, ensuring high durability and wear resistance. The use of 21 precision balls with a diameter of 5.556 mm ensures smooth and quiet operation.
71907 CD/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors
- Medical Equipment (e.g., Dental handpieces)
- Aerospace Actuation Systems
