S71908 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71908 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.11 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
28 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
/ each
In Stock
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S71908 ACE/P4A Bearing Product Overview & Core Advantages
The S71908 ACE/P4A is a precision angular contact ball bearing designed for applications demanding high rotational accuracy and rigidity. As a single-row bearing with a 25° contact angle and available preload, it excels at supporting combined loads—simultaneously handling significant radial and axial forces. Its P4 (ABEC-7) tolerance class ensures exceptional running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The bearing comes sealed and pre-lubricated for immediate installation and long-term, maintenance-free operation.
S71908 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (corrosion-resistant) bearing ring material. |
| 7 | Angular Contact Ball Bearing. |
| 1908 | Standardized size designation (Bore: 40mm, OD: 62mm, Width: 12mm). |
| ACE | Specific internal design with a 25° contact angle and optimized internal geometry. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
S71908 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust internal construction enable the bearing to support substantial combined radial and axial loads. The availability of preload further increases system rigidity, minimizing deflection under load for superior positional accuracy.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to smooth operation, allowing for a high limiting speed of 28,000 rpm.
- Precision Operation: Manufactured to P4 (ABEC-7) tolerance, this bearing guarantees extremely tight dimensional and running accuracy, resulting in low noise, low vibration, and enhanced machine performance.
- Maintenance-Free & Sealed Design: The integrated seals effectively protect the bearing from contaminants, and the factory-applied lubrication ensures consistent performance across the specified temperature range of -30°C to 110°C without the need for re-lubrication.
S71908 ACE/P4A Bearing Typical Application Areas
This high-precision bearing is engineered for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment.
- High-Frequency Motors and Spindles: Where high rotational speeds and accuracy are paramount.
- Robotics: Arm joints and precision gearboxes requiring high rigidity and responsiveness.
