71936 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71936 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
4.2 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
180 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
250 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
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71936 CDGB/P4A Bearing Product Overview & Core Advantages
The 71936 CDGB/P4A is a single row angular contact ball bearing engineered for ultra-high precision applications. Operating under a P4A tolerance class, it delivers exceptional dimensional accuracy and running precision. Its 15° contact angle is optimized to support significant combined loads, efficiently handling both radial and axial forces in one direction. The bearing is universally matchable (SU), allowing for flexible mounting in preloaded sets (typically in a 3-bearing arrangement) to achieve maximum system rigidity and rotational accuracy. With a light preload (Class B) and a phenolic cage, it is designed for demanding, high-speed operations such as machine tool spindles.
71936 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71936 | Basic bearing designation for a single row angular contact ball bearing with a 180mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed performance. |
| DGB | Indicates a universally matchable (SU) bearing. When two bearings are mounted with the wider ends facing each other (DB arrangement), they provide a preload effect. |
| P4A | Denotes an ultra-precision tolerance class, with extremely tight limits on bore, outside diameter, and width tolerances for superior running accuracy. |
71936 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing ensures minimal runout and high system stiffness, which is critical for applications requiring extreme positional accuracy.
- Superior High-Speed Capability: The combination of the 15° contact angle and the lightweight, high-strength phenolic cage allows for a high limiting speed of 11,000 rpm, reducing centrifugal forces and operational friction.
- Optimized Load Capacity: The angular contact design is engineered to carry substantial combined loads, with a high dynamic load rating of 37,800 lbf, making it suitable for applications with simultaneous radial and axial forces.
- Universal Matching Design: The DGB suffix signifies that the bearing is universally matchable. This allows for simplified mounting in preloaded pairs or triplets (as indicated by the "3" in the matched set), eliminating complex selection and adjustment procedures.
- Material Integrity: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and a long operational life under demanding conditions.
71936 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers where accuracy and speed are paramount.
- High-Frequency Motors and Spindles: Applications requiring smooth operation at very high rotational speeds.
- Precision Instrumentation: Medical devices, coordinate measuring machines (CMM), and optical scanners.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other critical rotational mechanisms.
