71936 CDGA/P4
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71936 CDGA/P4
Basic Information
System of measurement
Metric
Weight
4.2 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
280 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
380 mm
Outside diameter tolerance
-0.004mm to 0
Width
33 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
37800 lbf
Radial static load rating
47700 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71936 CDGA/P4 Bearing Product Overview & Core Advantages
The 71936 CDGA/P4 is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running precision. Its 15° contact angle and extra light preload (Class A) are optimized for high-speed operation, making it an ideal high-speed bearing solution. The open design, combined with phenolic cage and premium lubrication, ensures reliable performance under combined loads in demanding industrial environments.
71936 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71936 | Basic bearing designation indicating bearing size and series (280mm bore, 380mm OD). |
| C | 15° contact angle. |
| D | Enhanced internal design for high-speed operation. |
| G | Universal Matchable (SU) bearing, can be supplied in matched sets. |
| A | Extra light preload (Class A). |
| /P4 | Precision tolerance class (P4), ensuring extremely tight dimensional and running accuracy. |
71936 CDGA/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a bore diameter tolerance of -0.004mm to 0 and an outside diameter tolerance of -0.004mm to 0, this bearing provides exceptional dimensional stability and running accuracy for high-rigidity support.
- Optimized Load Capacity: The 15° contact angle enables efficient handling of combined loads (radial and axial). With a radial dynamic load rating of 37,800 lbf and a radial static load rating of 47,700 lbf, it offers robust performance.
- Superior High-Speed Performance: The phenolic cage and optimized internal geometry contribute to a high limiting speed of 7,500 rpm. The extra light preload minimizes friction and heat generation at high speeds.
- Universal Matching Capability: Designated as Universal Matchable (SU), these bearings can be supplied in matched sets (sets of 4) for pre-adjusted, simplified mounting in complex spindle arrangements, ensuring optimal performance and load distribution.
71936 CDGA/P4 Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring high rotational accuracy and rigidity.
- High-Frequency Motors and Spindles: Where minimal runout and high-speed capability are critical.
- Industrial Pumps and Compressors: For reliable operation under combined loads.
