71936 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71936 ACD/P4A
Basic Information
System of measurement
Metric
Weight
4.2 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
180 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
250 mm
Outside diameter tolerance
-0.011mm to 0
Width
33 mm
Width tolerance
-0.24mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
35775 lbf
Radial static load rating
45000 lbf
Limiting speed
7 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:
$ 3524.87
/ each
In Stock
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71936 ACD/P4A Bearing Product Overview & Core Advantages
The 71936 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy, making it ideal for machine tool spindles and other high-performance machinery. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and substantial axial loads in one direction—thanks to its defined 25° contact angle. The phenolic cage and prelubrication contribute to its suitability for high-speed operation up to 7,000 rpm.
71936 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71936 | Basic bearing series and size designation (180mm bore, 250mm OD, 33mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Signifies a high load capacity internal design. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
71936 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design, manufactured to P4 precision tolerances and featuring a 25° contact angle, provides high rigidity and exceptional running accuracy, minimizing deflection under load.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. The dynamic load rating of 35,775 lbf and static load rating of 45,000 lbf ensure reliable performance in demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the prelubrication facilitates reliable operation at the limiting speed of 7,000 rpm.
- Durable Construction: Components made from chrome steel offer high hardness and wear resistance, ensuring a long service life.
71936 ACD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for applications requiring high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
