S71908 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71908 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.096 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
6.35 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1350 lbf
Limiting speed
38 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:
$ 377
/ each
In Stock
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S71908 CE/HCP4A Bearing Product Overview & Core Advantages
The S71908 CE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running accuracy and rotational stability. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling radial and axial forces—making it an ideal choice for high-rigidity, high-speed spindle arrangements. The use of ceramic balls and a phenolic cage contributes to reduced friction, lower operating temperatures, and enhanced limiting speed capabilities.
S71908 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71908 | Denotes the bearing series and size (40mm bore, 62mm OD, 12mm width). |
| CE | Indicates the use of hybrid ceramic balls (Silicon Nitride), which offer lower density, reduced centrifugal force, and superior performance at high speeds. |
| HC | Refers to the phenolic resin cage, which is lightweight and provides excellent dimensional stability and guidance in high-speed applications. |
| P4A | Specifies the tolerance class P4 (ABEC-7) with specific running accuracy requirements, ensuring minimal runout and vibration. |
S71908 CE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation. This leads to a higher limiting speed (38,000 rpm) and extended service life compared to all-steel bearings.
- High Rigidity & Load Capacity: The 15° contact angle is optimized to support substantial axial loads in one direction while also handling significant radial loads, providing excellent system rigidity.
- Optimized High-Speed Performance: The lightweight phenolic cage (HC) minimizes centrifugal forces and ensures stable ball guidance at ultra-high speeds, preventing cage failure and maintaining precision.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional control on the bore diameter, outside diameter, and width, guaranteeing consistent, high-performance operation in precision assemblies.
- Pre-Lubricated & Sealed: Comes pre-lubricated for immediate operation and features contact seals to protect the precision bearing internals from contamination.
S71908 CE/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Motors for PCB drilling, dental handpieces, and small turbine spindles.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring ultra-precise rotation.
