71905 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71905 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.04 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1186 lbf
Radial static load rating
630 lbf
Limiting speed
75 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:
$ 177.06
/ each
In Stock
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71905 CE/P4A Bearing Product Overview & Core Advantages
The 71905 CE/P4A is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. Engineered to P4 (ABEC-7) tolerance class, it delivers superior running accuracy and rotational stability. Its key advantage lies in its ability to accommodate combined loads—handling significant radial loads alongside thrust loads in one direction—making it ideal for high-rigidity, precision spindle arrangements. The phenolic cage and optimized internal geometry contribute to its high-speed capability and smooth operation.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71905 | Basic bearing designation (25mm bore, 42mm OD, 9mm width) |
| CE | High-precision design with 15° contact angle and optimized internal geometry |
| P4A | P4 (ABEC-7) tolerance class with specific running accuracy requirements |
71905 CE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with strict dimensional tolerances (bore: -0.005mm to 0), ensuring minimal runout and vibration for precise applications.
- Optimized Load Capacity: The 15° contact angle enables efficient handling of combined radial and axial loads, with a dynamic load rating of 1186 lbf and static load rating of 630 lbf.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a limiting speed of 75,000 rpm while maintaining dimensional stability.
- Pre-Configured Performance: Available with preload for immediate optimal stiffness and reduced deflection under operational loads.
- Material Excellence: Chrome steel rings and balls provide high hardness and wear resistance, suitable for operating temperatures from -30°C to 110°C.
71905 CE/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instruments: Measuring equipment, optical scanners, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and high-frequency electric motors
- Medical Equipment: Dental handpieces, laboratory centrifuges, and surgical tools
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
