71908 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71908 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1350 lbf
Limiting speed
49 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:
$ 313.79
/ each
In Stock
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71908 CE/P4A Bearing Product Overview & Core Advantages
The 71908 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant axial loads in one direction while simultaneously supporting radial loads. Its compact design, featuring a 15° contact angle, provides excellent operational stability and is optimized for high-speed performance, making it ideal for precision spindles and other high-reliability machinery.
71908 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CE | Indicates a high-capacity design with an optimized internal geometry and a larger ball complement for increased load ratings. |
| P4A | Denotes a P4 tolerance class (equivalent to ABEC-7) with specific dimensional and running accuracy requirements for precision applications. The "A" suffix indicates a restricted contact angle of 15°. |
71908 CE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class standards, this bearing ensures minimal runout and vibration. The 15° contact angle and robust construction provide high rigidity, essential for maintaining accuracy under load.
- Optimized Load Capacity: The CE design incorporates a larger number of balls (19 balls) and an optimized raceway geometry, resulting in a high dynamic load rating of 2194 lbf and static load rating of 1350 lbf, enabling it to handle demanding combined loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 49,000 rpm. This makes the bearing suitable for very high-speed spindle applications.
- Pre-Lubricated & Ready for Use: The bearing comes pre-lubricated, ensuring immediate operational readiness and reliable performance within its specified temperature range of -30°C to 110°C.
71908 CE/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Frequency Spindles: PCB drilling and precision engraving machines.
- Precision Instruments: Measuring devices and optical equipment requiring minimal runout.
- High-Speed Motors: Applications where rotational accuracy and speed are critical.
