S71908 CB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71908 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.12 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
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
3.969 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1215 lbf
Radial static load rating
934 lbf
Limiting speed
30 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:
$ 377.05
/ each
In Stock
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S71908 CB/P4A Bearing Product Overview & Core Advantages
The S71908 CB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior performance. Engineered to a P4 (ABEC-7) tolerance class, it offers exceptional running accuracy. This bearing is preloaded and lubricated for immediate use, capable of handling combined loads with a 15° contact angle. Its compact design and high limiting speed of 30,000 rpm make it an ideal choice for high-speed, high-rigidity applications where space is at a premium.
S71908 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71908 CB/P4A breaks down as follows:
- S: Denotes a series of high-precision angular contact ball bearings.
- 7: Indicates the contact angle (15° in this case).
- 1908: Specifies the bore size (40 mm) and series dimensions.
- CB: Represents a specific internal clearance and preload combination for optimal operational performance.
- P4A: Signifies the tolerance class (P4/ABEC-7) and that the bearing meets specific accuracy and performance criteria for high-speed operation.
S71908 CB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to a P4 tolerance class, the bearing ensures minimal runout and vibration. The single-row design with a 15° contact angle provides high rigidity, essential for precise shaft positioning.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 30,000 rpm. This, combined with factory-applied lubrication, ensures stable operation at high velocities.
- Optimized Load Capacity: The design is optimized to support significant combined (radial and axial) loads, with a dynamic load rating of 1215 lbf and a static load rating of 934 lbf.
- Sealed & Pre-Lubricated: As a sealed unit, it is protected from contamination. Being pre-lubricated, it is ready for installation, reducing maintenance needs.
- Durable Material Construction: Manufactured from chrome steel for both rings and balls, the bearing offers excellent wear resistance and longevity.
S71908 CB/P4A Bearing Typical Application Areas
The S71908 CB/P4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Equipment
- Robotic Drives and Servo Motors
