71912 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71912 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.16 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.008mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
3285 lbf
Limiting speed
26 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:
$ 545.16
/ each
In Stock
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71912 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71912 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its defining characteristic is a 25° contact angle, which enables it to support significant combined loads—both radial and axial loads in one direction. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing delivers exceptional running accuracy and rotational stability. The use of ceramic balls and a phenolic cage further enhances its performance, reducing weight and inertial forces for superior high-speed capability.
71912 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Significance & Benefit |
|---|---|---|
| ACD | Angular Contact, 25° Contact Angle | Optimized for handling high axial loads in one direction in combination with radial loads. |
| HC | Hybrid Ceramic (Ceramic Balls) | Reduces friction and heat generation, increases stiffness, and allows for higher limiting speeds. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees extremely tight dimensional and running accuracy for precision applications. |
71912 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Performance: The combination of ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling a high limiting speed of 26,000 rpm. This makes it an ideal high-speed bearing.
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel rings provide high axial and radial rigidity, supporting substantial combined loads.
- Precision & Accuracy: Manufactured to P4 tolerance class with a preload option, this bearing ensures minimal runout and vibration, which is critical for maintaining precision in demanding machinery.
- Optimized for Performance: The open seal type allows for custom lubrication schemes, while the standard lubrication is suitable for a wide temperature range of -30°C to 110°C.
71912 ACD/HCP4A Bearing Typical Application Areas
This precision angular contact bearing is designed for high-performance applications, including:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace & Defense Systems
