S71908 ACEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71908 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.004mm 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°C to 110 °C
Radial dynamic load rating
2106 lbf
Radial static load rating
1282 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71908 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71908 ACEGA/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its compact design, with a 40 mm bore and 12 mm width, makes it ideal for space-constrained, high-speed applications such as precision spindles. The bearing is universally matchable (SU), allowing for precise axial preload adjustment when mounted in pairs, delivering outstanding rigidity and the ability to handle combined loads.
S71908 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| AC | Angular Contact design with a 25° contact angle. | Optimized for handling combined radial and axial loads. |
| EGA | Extra Light Preload (Class A). | Reduces noise and vibration, ideal for high-speed operation. |
| P4A | High Precision Tolerance Class. | Guarantees exceptional dimensional and running accuracy for critical applications. |
S71908 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and phenolic cage provides high rigidity, enabling the bearing to support significant combined loads (radial and axial) simultaneously.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 41,000 rpm, making it a true high-speed bearing.
- Sealed and Pre-Lubricated for Longevity: As a sealed bearing pre-lubricated with grease, it is protected from contamination and offers a long service life with minimal maintenance, operating reliably within a temperature range of -30°C to 110°C.
- Precision Engineering: Manufactured to P4A tolerances with tight dimensional controls on the bore, outside diameter, and width, ensuring predictable performance and ease of installation in high-precision assemblies.
S71908 ACEGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Instrumentation: In medical devices, optical scanners, and measuring equipment.
- High-Frequency Motors and Spindles: Used in PCB drilling and CNC routing.
- Robotics: In critical joints and arm assemblies requiring high positional accuracy.
