S71908 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71908 ACE/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
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
19
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2106 lbf
Radial static load rating
1282 lbf
Limiting speed
34 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:
$ 376.48
/ each
In Stock
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S71908 ACE/HCP4A Bearing Product Overview & Core Advantages
The S71908 ACE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This sealed single bearing features a 25° contact angle and is supplied with a light preload, making it ideal for arrangements requiring high rigidity and precise rotational accuracy. Its ceramic ball construction and P4 (ABEC-7) tolerance class ensure superior high-speed capability and minimal rotational vibration, delivering reliable operation in high-performance systems.
S71908 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Super-precision bearing series |
| 7 | Angular contact ball bearing |
| 19 | Specific internal design code |
| 08 | Bore diameter code (40 mm) |
| ACE | Internal design featuring a 25° contact angle and optimized internal geometry |
| HC | Hybrid Ceramic construction (ceramic balls with steel rings) |
| P4 | P4 (ABEC-7) tolerance class for ultra-precision applications |
| A | Light preload grade for enhanced rigidity |
S71908 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (34,000 rpm). This construction also provides superior resistance to electrical erosion and operates effectively with minimal lubrication.
- High Rigidity & Preload: The bearing is supplied with a light preload, which eliminates internal clearance and provides immediate high rigidity upon installation. This is critical for applications requiring minimal shaft deflection and precise positioning.
- Precision & Sealed Design: Manufactured to P4 tolerance class, this bearing ensures smooth, quiet operation with minimal runout. The integral seals protect the high-precision internals from contaminants and retain the factory-applied lubricant, ensuring long-term performance and reliability.
- Optimized Internal Geometry: The 25° contact angle is optimally designed to handle combined loads, providing excellent support for both radial and axial forces in one direction.
- Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at high speeds and is compatible with the specified temperature range (-30° to 110 °C).
S71908 ACE/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Medical and Dental Handpiece Drives
- Aerospace Actuators and Control Systems
- High-Performance Robotics and Automation
