71812 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71812 ACD/HCP4
Basic Information
System of measurement
Metric
Weight
0.088 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
78 mm
Outside diameter tolerance
-0.007mm to 0
Width
10 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
2858 lbf
Radial static load rating
3015 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:
$ 576.84
/ each
In Stock
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71812 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71812 ACD/HCP4 is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle, enabling it to support combined loads (simultaneous radial and axial loads) efficiently. Manufactured to P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. Its compact design, combined with a phenolic cage and ceramic balls, makes it an ideal solution for high-speed and high-reliability applications where precision is paramount.
71812 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Indicates a 25° contact angle and that the bearing is designed for universal mounting (can be paired in various arrangements). |
| HC | Signifies the use of hybrid ceramic balls (silicon nitride), which reduce weight, lower friction, and allow for higher speeds. |
| P4 | Denotes a super-precision tolerance class (ABEC-7), ensuring minimal runout and vibration for ultra-precise applications. |
71812 ACD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized 25° contact angle and robust internal geometry provide excellent resistance to deformation under combined loads, ensuring stable performance.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 26,000 rpm. This makes it an ideal high-speed bearing.
- Reduced Friction and Heat Generation: Ceramic balls have a lower coefficient of thermal expansion and are harder than steel, leading to less friction, lower operating temperatures, and extended service life.
- Pre-Lubricated for Immediate Use: The bearing comes pre-lubricated, ensuring optimal performance from the first rotation and simplifying installation.
71812 ACD/HCP4 Bearing Typical Application Areas
This precision bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace & Defense Systems
- Medical Equipment (e.g., high-speed dental handpieces)
