71917 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71917 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.5 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.008mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6660 lbf
Radial static load rating
5130 lbf
Limiting speed
24 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:
$ 992.18
/ each
In Stock
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71917 CE/P4A Bearing Product Overview & Core Advantages
The 71917 CE/P4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is optimized to support high-speed operation and combined loads, carrying significant thrust loads in one direction alongside radial loads. Its P4 (ABEC-7) tolerance class ensures minimal runout and vibration, making it ideal for high-reliability, precision machinery. The phenolic resin cage contributes to smooth operation at high speeds, while the preloaded configuration enhances system stiffness and positioning accuracy from the moment of installation.
71917 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with an 85 mm bore, 120 mm OD, and 18 mm width. |
| CE | Indicates a high-capacity design with an optimized internal geometry and a larger number of balls (23), enhancing both dynamic and static load ratings. |
| P4A | Specifies the tolerance class P4 (ABEC-7) and a specific contact angle of 15°. The 'A' suffix often denotes a standard 30° contact angle, but in this specific context, it is defined as 15°. |
71917 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class, this bearing ensures extremely tight dimensional and running accuracy, which is critical for minimizing system vibration and achieving precise rotational movement.
- Optimized Load Capacity: The CE design incorporates 23 balls of 11.112 mm diameter, significantly boosting the radial dynamic load rating (6660 lbf) and static load capacity (5130 lbf), enabling it to handle demanding combined loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly with minimal friction, supporting a high limiting speed of 24,000 rpm.
- Preload & Stability: Supplied with a light preload, the bearing eliminates internal clearance, resulting in enhanced system stiffness and improved rotational accuracy without the need for complex adjustment during installation.
71917 CE/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-output industrial and aerospace transmissions.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small, high-RPM applications.
- Robotics: In critical joints and actuators requiring high positional accuracy and responsiveness.
