71911 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.15 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
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4095 lbf
Radial static load rating
3082 lbf
Limiting speed
28 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:
$ 479.09
/ each
In Stock
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71911 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71911 ACD/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its design enables it to support combined loads, accommodating significant axial loads in one direction alongside radial loads. Manufactured to P4 (ABEC-7) tolerance class, it guarantees exceptional running accuracy. A key feature is its ceramic ball construction, which reduces centrifugal forces, minimizes friction, and enhances performance at high rotational speeds. This bearing is preloaded and comes pre-lubricated, making it ready for installation in demanding, precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high-precision design. |
| HC | Hybrid Ceramic, signifying ceramic balls and steel rings. |
| P4 | Denotes a P4 (ABEC-7) tolerance class for superior precision. |
| A | Specifies that the bearing is supplied with a preload. |
71911 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces weight and centrifugal loading, enabling higher limiting speeds (28,000 rpm) and reduced operating temperatures.
- High Rigidity and Precision: The 25° contact angle and P4 tolerance class provide excellent running accuracy and system stiffness, which is critical for minimizing deflection under load.
- Optimized for High Speeds: The lightweight phenolic cage is designed for high-speed operation, offering good strength with minimal friction. The ceramic balls further contribute to the exceptional high-speed performance.
- Superior Load Capacity: With a dynamic load rating of 4095 lbf and a static load rating of 3082 lbf, this bearing reliably handles significant combined radial and axial loads.
- Pre-lubricated and Preloaded: The bearing is supplied lubricated and with a preload, ensuring immediate high-performance operation and simplified installation.
71911 ACD/HCP4A Bearing Typical Application Areas
This high-performance angular contact ball bearing is ideally suited for applications requiring high speed, precision, and rigidity. Key industries and equipment include:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Dental and Medical Handpieces
- High-Frequency Motors and Spindles
- Aerospace Actuation Systems
