71917 CB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71917 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.57 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
6.747 mm
Ball quantity
37
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3668 lbf
Radial static load rating
3668 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:
$ 992.48
/ each
In Stock
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71917 CB/P4A Bearing Product Overview & Core Advantages
The 71917 CB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This P4 (ABEC-7) tolerance class bearing is designed to accommodate primarily axial loads in one direction and combined loads. Its compact design, featuring a 15° contact angle and phenolic resin cage, makes it an ideal solution for high-speed spindles and other precision machinery where superior running accuracy and high rigidity are critical.
71917 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CB | Specific internal design with a 15° contact angle and modified internal clearance/raceway contours for optimized performance. |
| P4A | Indicates a high-precision tolerance class equivalent to ABEC-7. The "A" suffix often denotes specific dimensional and running accuracy requirements. |
71917 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration, providing stable and precise shaft guidance essential for high-precision machining.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle high axial loads in one direction and combined (radial and axial) loads.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 22,000 rpm.
- Preload & Matched Arrangement: The bearing is supplied with a preload, increasing system rigidity and rotational accuracy. It is designed as a single unit for simplified installation and precise performance.
- Durable Construction: Components made from chrome steel offer high wear resistance and durability, ensuring a long service life under demanding conditions.
71917 CB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Gearboxes
- High-Frequency Motors
- Medical Equipment (e.g., Dental handpieces, Centrifuges)
- Aerospace & Defense Systems (Gyroscopes, Navigation instruments)
