71908 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71908 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4A
Seal type
Open
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
Lubricated
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
No drawings available at the moment, will be launched soon
Price:
$ 86.98
/ each
In Stock
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71908 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71908 ACEGA/P4A is a metric single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating with a 25° contact angle, this bearing excels at supporting combined radial and axial loads in one direction. Manufactured to P4A tolerance class, it delivers superior running accuracy and is universally matchable (SU), allowing for precise preload control when mounted in pairs. Its compact design, featuring a 40mm bore and 12mm width, makes it ideal for space-constrained, high-performance assemblies.
71908 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| E | Optimized internal design for enhanced load capacity. |
| GA | Indicates a specific preload group for universal matching (SU). |
| P4A | High precision tolerance class for superior running accuracy. |
71908 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row angular contact design with a 25° contact angle and optimized internal geometry provides high rigidity and is capable of handling significant combined loads.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, ensuring minimal runout and vibration for high-precision applications.
- High-Speed Capability: The lightweight phenolic resin cage and open design contribute to lower friction and stable operation at high speeds, with a limiting speed of 41,000 rpm.
- Universal Matching: The GA preload designation allows this bearing to be universally matched with another identical bearing to form a duplex set, enabling precise control over axial rigidity and preload.
- Durable Construction: Made from chrome steel for both rings and balls, ensuring high durability and long service life under demanding conditions.
71908 ACEGA/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Equipment
- Aerospace Control Systems
