S71908 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71908 CB/HCP4A
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
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 376.9
/ each
In Stock
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S71908 CB/HCP4A Bearing Product Overview & Core Advantages
The S71908 CB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a phenolic cage and ceramic balls, enabling superior high-speed capability and extended service life. Its P4 (ABEC-7) tolerance class ensures minimal runout and vibration, making it ideal for high-rigidity support in precision machinery. The bearing is pre-lubricated and sealed, offering reliable, maintenance-free operation.
S71908 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CB | Specific internal clearance and preload | Optimized for high rigidity and precise rotational accuracy. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) | Reduced friction, higher speed limits, and longer life. |
| P4A | P4 (ABEC-7) tolerance class with specific accuracy enhancements | Guarantees ultra-precise performance for critical applications. |
S71908 CB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling a limiting speed of 36,000 rpm and providing excellent resistance to wear and electrical erosion.
- High Rigidity & Preload: The 15° contact angle and controlled preload (CB suffix) provide high axial and radial stiffness, ensuring stable performance under combined loads.
- Optimized High-Speed Design: The lightweight phenolic cage ensures smooth operation at high velocities, while the sealed design retains lubrication effectively.
- Maintenance-Free Operation: The integral seals protect against contamination and retain the factory-applied lubricant, ensuring consistent performance across the operating temperature range of -30°C to 110°C.
S71908 CB/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation and Actuators
