71906 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71906 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.05 kg
Tolerance class
P4A
Seal type
Open
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
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
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In Stock
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71906 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71906 ACEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to the stringent P4A tolerance class, this bearing is engineered to handle combined loads with high rigidity and reliability. Its compact design, featuring a 9 mm width, makes it ideal for space-constrained, high-precision assemblies. The bearing comes pre-lubricated and is Universal Matchable (SU), allowing for precise preload control when mounted in pairs, ensuring optimal performance in demanding operational conditions.
71906 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71906 ACEGA/P4A provides detailed technical specifications:
- 71906: Denotes the bearing series and size (30mm bore, 47mm OD).
- AC: Angular Contact design with a 25° contact angle.
- E: Optimized internal design for high-speed operation.
- GA: Indicates a Universal Matchable (SU) bearing supplied in a matched set of 2 with Extra light (Class A) preload.
- P4A: Specifies the tolerance class, representing superior dimensional and running accuracy beyond standard ABEC 7.
- Open: The bearing is supplied without seals or shields, optimized for high-speed applications.
71906 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design and P4A tolerance class provide superior radial and axial rigidity, ensuring minimal deflection and high running accuracy for precision spindles.
- Combined Load Capacity: The 25° contact angle enables the bearing to efficiently support significant combined radial and axial loads simultaneously.
- High-Speed Performance: Featuring a lightweight phenolic resin cage and an optimized internal design, this bearing achieves an exceptional limiting speed of 100,500 rpm.
- Universal Matching: As a Universal Matchable (SU) bearing supplied in a pre-set pair, it simplifies installation and ensures consistent, predictable preload for maximum system stiffness and longevity.
- Material Quality: Constructed from chrome steel for rings and balls, ensuring high durability and fatigue resistance under demanding conditions.
71906 ACEGA/P4A Bearing Typical Application Areas
This super-precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Medical Equipment (Dental handpieces, surgical tools)
- Aerospace Instrumentation (Gyroscopes, navigation systems)
- High-Frequency Spindles (PCB drilling, precision engraving)
- Robotics (High-accuracy robotic arm joints)
