71900 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71900 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.009 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
439 lbf
Radial static load rating
169 lbf
Limiting speed
165 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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71900 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71900 ACEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with Extra Light (Class A) preload, it delivers superior running accuracy and minimal deflection under load. Its 25° contact angle is optimized to handle significant combined loads (radial and axial) simultaneously, making it ideal for high-precision spindles and other critical machinery components where rigidity and precision are paramount.
71900 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series, indicating a super-precision, miniature angular contact design. |
| AC | Angular Contact design with a 25° contact angle. |
| E | Optimized internal geometry for improved performance and load capacity. |
| GA | Specifies the preload class: Extra Light (Class A). |
| P4A | Indicates a high-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
71900 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The phenolic resin cage ensures stable operation at high speeds with low friction and excellent guidance for the 11 precision balls. Combined with the P4A tolerance class and Class A preload, this bearing provides exceptional rotational stiffness and accuracy, minimizing runout and vibration.
- Superior Load Capacity: The 25° contact angle and optimized internal design enable the bearing to efficiently support combined radial and axial loads. With a dynamic load rating of 439 lbf and a static load rating of 169 lbf, it offers reliable performance in demanding applications.
- High-Speed Capability: The lightweight phenolic cage and open design (no seals) contribute to a very high limiting speed of 165,000 rpm, making it suitable for ultra-high-speed spindles.
- Universal Matching: Designated as Universal Matchable (SU), this bearing can be universally paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to create a matched set that shares loads and enhances system rigidity.
71900 ACEGA/P4A Bearing Typical Application Areas
The 71900 ACEGA/P4A is engineered for the most demanding precision applications, including:
- High-Frequency Spindles for PCB drilling and milling
- Precision Machine Tool Spindles
- High-Speed Automation & Robotics
- Dental Handpiece Drives
- Optical Scanner Motors and other miniature high-speed instrumentation
