71908 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71908 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1912 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
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
Price:
$ 89.11
/ each
In Stock
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71908 CDGA/P4A Bearing Product Overview & Core Advantages
The 71908 CDGA/P4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Designed to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 15° contact angle and extra light preload (Class A), making it ideal for high-speed operation and precise positioning systems. Its open seal type allows for optimal lubrication management in controlled environments, while the P4A tolerance class ensures superior running accuracy and rotational performance.
71908 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CDGA | Indicates a specific internal design with a 15° contact angle and optimized internal geometry for high-speed performance and precise load handling. |
| P4A | Denotes an ultra-precision tolerance class, exceeding ABEC 7 standards, ensuring minimal runout and vibration for critical applications. |
71908 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with a phenolic cage, this bearing delivers exceptional dimensional stability and low vibration, crucial for high-precision machinery.
- Superior Load Capacity: The angular contact design with a 15° contact angle efficiently handles combined radial and axial loads, providing reliable performance under complex loading conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage and precision-ground chrome steel components enable a high limiting speed of 56,000 rpm, making it suitable for demanding high-speed applications.
- Universal Matching Capability (SU): Designed as a Universal Matchable bearing, it can be paired with other identical bearings in sets (typically 3) to form a pre-loaded arrangement, enhancing system rigidity and accuracy.
71908 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles for high-speed milling and grinding
- Precision Grinding Spindles
- High-Frequency Motors and Spindle Drives
- Medical Equipment requiring high rotational accuracy
- Aerospace Positioning Systems
- Semiconductor Manufacturing Equipment
