S71911 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71911 ACB/P4A
Basic Information
System of measurement
Metric
Weight
0.19 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
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
5.556 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2106 lbf
Radial static load rating
1721 lbf
Limiting speed
20 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:
$ 575.21
/ each
In Stock
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S71911 ACB/P4A Bearing Product Overview & Core Advantages
The S71911 ACB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to handle combined loads—significant radial and axial loads in one direction simultaneously. Its compact design, featuring a 13 mm width, makes it ideal for space-constrained, high-reliability machinery. The bearing comes pre-lubricated and is preloaded, ensuring immediate operational readiness and consistent performance.
S71911 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The S71911 ACB/P4A model number provides detailed technical specifications:
- S7: Denotes a series of high-precision angular contact ball bearings.
- 1911: Standard dimension series code (19 for width series, 11 for bore diameter code).
- ACB: Signifies a 25° contact angle and a specific internal design optimized for high rigidity and speed.
- P4A: Indicates a P4 tolerance class (equivalent to ABEC-7) and a specific preload level for minimal runout and high rotational accuracy.
S71911 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance standards with a phenolic resin cage, this bearing provides exceptional dimensional stability and low vibration, which is critical for high-speed and high-precision applications.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable it to support substantial combined radial and axial loads effectively.
- Optimized for High-Speed Operation: The lightweight phenolic cage and precision-ground chrome steel components contribute to a high limiting speed of 20,000 rpm, reducing centrifugal forces and heat generation.
- Ready-to-Use and Durable: The bearing is pre-lubricated, sealed against contamination, and preloaded, offering long service life with minimal maintenance in a wide temperature range from -30°C to 110°C.
S71911 ACB/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-frequency Electric Spindles
- Precision Grinding Machines
- High-speed Robotic Drives
- Medical and Dental Equipment
