71911 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71911 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2250 lbf
Limiting speed
32 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 478.91
/ each
In Stock
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71911 ACE/P4A Bearing Product Overview & Core Advantages
The 71911 ACE/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction and combined loads, its optimized internal geometry and P4 (ABEC-7) precision class ensure superior performance in demanding operational environments. The phenolic resin cage contributes to smooth, high-speed operation, making this bearing a reliable choice for applications where low friction and high limiting speeds are critical.
71911 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation. |
| ACE | Specific internal design featuring a 25° contact angle and optimized internal geometry for high performance. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific dimensional and running accuracy requirements for high-precision applications. |
71911 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 25° contact angle provides excellent axial load capacity and rigidity, stabilized by the P4 precision manufacturing tolerances for minimal runout and vibration.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures lower centrifugal forces and reduced friction, enabling a high limiting speed of 32,000 rpm and smooth operation.
- Superior Load Ratings: Engineered with a radial dynamic load rating of 3330 lbf and a static load rating of 2250 lbf, this bearing reliably handles significant combined loads.
- Pre-Lubricated for Immediate Use: The bearing is pre-lubricated, facilitating immediate installation and initial operation within a wide temperature range of -30°C to 110°C.
71911 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles
- High-Speed Grinding and Milling Heads
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Positioning Systems
