71918 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71918 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.54 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6908 lbf
Radial static load rating
5400 lbf
Limiting speed
22 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:
$ 1090.49
/ each
In Stock
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71918 CE/P4A Bearing Product Overview & Core Advantages
The 71918 CE/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously support combined radial and axial loads in one direction, this bearing features a 15° contact angle for optimal thrust capacity. Manufactured to P4 (ABEC-7) tolerance class, it guarantees superior running accuracy and is preloaded for enhanced stiffness in demanding operational environments. Its compact design and high-grade materials make it an ideal solution for high-speed spindles and precision machinery.
71918 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series, indicating a light series, single-row angular contact ball bearing with a 90mm bore. |
| CE | Specific internal design with a 15° contact angle and optimized internal geometry for high-speed performance. |
| P4A | Indicates a P4 tolerance class (equivalent to ABEC-7) with specific running accuracy and preload applied for high rigidity. |
71918 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with phenolic cage and P4 precision ensures minimal runout and high dimensional stability. The applied preload eliminates internal clearance, resulting in superior system stiffness critical for precision machining.
- Optimized Load Capacity: With a 15° contact angle, this bearing is engineered to handle significant combined radial and axial loads simultaneously. Its dynamic load rating of 6908 lbf and static load rating of 5400 lbf provide reliable performance under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage and precision-ground chrome steel balls reduce centrifugal forces, enabling a high limiting speed of 22,000 rpm. This makes it suitable for high-speed spindle applications.
- Ready-to-Use Lubrication: The bearing is supplied lubricated, ensuring immediate installation and optimal initial performance within its specified temperature range of -30°C to 110°C.
71918 CE/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, including:
- Machine Tool Spindles for CNC machining centers, grinders, and lathes
- High-Frequency Motors and precision spindles
- Robotic Drives and precision gearboxes
- Medical Equipment such as high-speed dental handpieces
- Aerospace Actuators and instrumentation
