71911 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71911 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.18 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4095 lbf
Radial static load rating
3082 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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:
$ 119.94
/ each
In Stock
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71911 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71911 ACDGB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional performance. Designed to accommodate primarily axial loads in one direction, as well as combined radial and axial loads, this bearing features a 25° contact angle and P4A super-precision tolerance class. Its light preload (Class B) ensures minimal deflection and smooth operation, making it ideal for high-speed spindles and other precision machinery. The bearing is universally matchable (SU), allowing for flexible mounting arrangements in sets to achieve desired rigidity and load distribution.
71911 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| GB | Indicates Light Preload (Class B), which reduces deflection and enhances rotational accuracy. |
| P4A | Denotes super-precision tolerance class, exceeding ABEC 7 standards, for applications requiring extreme running accuracy and low vibration. |
71911 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing delivers exceptional running accuracy and stiffness, minimizing system deflection under load.
- Optimized Load Capacity: The 25° contact angle and robust construction enable high axial load carrying capacity in one direction, as well as effective handling of combined radial and axial loads.
- High-Speed Capability: The lightweight phenolic resin cage ensures stability and low friction at high rotational speeds, supporting a limiting speed of 46,000 rpm.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be mounted in various preloaded arrangements (e.g., back-to-back, face-to-face) with other bearings from the same manufacturing lot to achieve optimal system performance.
- Premium Materials: Components made from chrome steel for rings and balls provide high hardness, wear resistance, and long service life.
71911 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Machining Centers: Where accuracy, rigidity, and speed are critical.
- Precision Instrumentation: Measuring devices and analytical equipment.
- Robotic Drives and Servo Motors: Applications requiring precise motion control and high dynamic response.
- Medical Equipment: High-speed dental handpieces and imaging devices.
