71812 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71812 ACD/P4
Basic Information
System of measurement
Metric
Weight
0.1 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
22 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:
$ 576.97
/ each
In Stock
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71812 ACD/P4 Bearing Product Overview & Core Advantages
The 71812 ACD/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to simultaneously handle combined radial and axial loads, this bearing features a single-row design with a 25° contact angle, optimized for high rigidity and precise operation. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and precision machinery. Preloaded and lubricated from the factory, it offers immediate performance and long service life in demanding environments.
71812 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71812 | Basic bearing designation, indicating the series and size. |
| AC | Angular Contact design, optimized for combined loads. |
| D | Signifies a high contact angle of 25°, providing high axial load capacity. |
| P4 | Indicates a high-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration. |
71812 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to handle significant combined radial and axial loads with high rigidity, ensuring stable performance under demanding conditions.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 22,000 rpm. This makes it suitable for high-speed applications like spindle drives.
- Precision Engineering: Manufactured to P4 tolerance standards, this bearing guarantees exceptional running accuracy and low noise levels, which is critical for precision machinery and instrumentation.
- Optimized Material Selection: Components made from chrome steel (rings and balls) offer high hardness and wear resistance, while the phenolic cage provides excellent strength and thermal stability.
- Preload & Factory Lubrication: Supplied preloaded and lubricated, the bearing is ready for installation, reducing setup time and ensuring consistent performance from the start.
71812 ACD/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instruments: Measuring equipment, optical devices, and laboratory apparatus.
- High-Speed Drives: Electric motors, turbochargers, and other high-rotational-speed machinery.
- Medical Equipment: Dental handpieces, centrifuges, and imaging systems requiring high precision and reliability.
