S71906 ACEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71906 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.048 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1215 lbf
Radial static load rating
686 lbf
Limiting speed
100.5 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
No drawings available at the moment, will be launched soon
In Stock
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S71906 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71906 ACEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing from a universally matchable (SU) set, it excels in handling combined radial and axial loads simultaneously. Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing delivers superior running accuracy, high rigidity, and reliable operation in demanding environments. Its compact design and sealed construction make it ideal for high-precision spindles and other critical machinery.
S71906 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACEGA | 25° contact angle, Extra light preload (Class A), Phenolic cage, Universal Matchable (SU) | Optimized for high-speed operation with low friction and thermal stability |
| P4A | Super-precision tolerance class (equivalent to ABEC 7) | Exceptional running accuracy and dimensional stability |
S71906 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and optimized internal geometry provide excellent resistance to combined loads, making it suitable for applications with significant radial and axial force components.
- Superior High-Speed Performance: The phenolic resin cage ensures low friction, reduced weight, and excellent dimensional stability at high rotational speeds, contributing to the impressive limiting speed of 100,500 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, ensuring consistent performance and easy installation in precision assemblies.
- Sealed & Lubricated for Life: The sealed design with factory-applied grease lubrication protects against contamination and provides maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71906 ACEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles
- High-Speed Motors: Servo motors, spindle motors, and high-frequency applications
- Precision Instruments: Measuring equipment, optical instruments, laboratory devices
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
