S71911 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71911 ACB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.18 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
24 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 575.01
/ each
In Stock
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S71911 ACB/HCP4A Bearing Product Overview & Core Advantages
The S71911 ACB/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to simultaneously handle combined loads (radial and axial loads in both directions), this metric series bearing features a compact design with a 55 mm bore. Its ceramic balls and P4 (ABEC-7) tolerance class ensure superior performance in high-speed and high-rigidity scenarios, making it an ideal solution for advanced industrial machinery.
S71911 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACB | Angular Contact, 25° Contact Angle | Optimized for handling significant axial loads and providing high rigidity |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduced weight, lower friction, and capability for higher speeds and longer service life |
| P4A | P4 (ABEC-7) Precision Class | Guarantees extremely tight running accuracy for applications requiring minimal vibration and noise |
S71911 ACB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to support substantial combined loads, providing stable and precise rotational movement under demanding conditions.
- Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and friction, allowing for a high limiting speed of 24,000 rpm.
- Precision & Longevity: Manufactured to P4 tolerance with a sealed design and pre-lubrication, this bearing delivers consistent, high-accuracy performance and extended service life in clean environments.
- Thermal Stability: The specified materials and design support a wide operating temperature range from -30°C to 110°C.
S71911 ACB/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Equipment
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation and Actuators
