71824 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71824 CDGA/P4
Basic Information
System of measurement
Metric
Weight
0.55 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
8.731 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7470 lbf
Radial static load rating
10125 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
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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71824 CDGA/P4 Bearing Product Overview & Core Advantages
The 71824 CDGA/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and reliability. Manufactured to P4 tolerance class, this bearing delivers superior running precision. Its 15° contact angle is optimized to handle combined loads, efficiently supporting significant radial loads alongside axial loads in one direction. The extra light preload (Class A) minimizes deflection under light loads, ensuring smooth operation and enhanced positional accuracy. As a Universal Matchable (SU) bearing, it can be precisely paired with a second identical bearing to form a pre-loaded duplex set, offering increased rigidity and performance in demanding setups.
71824 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| 71824 | Basic Bearing Number | Defines the standard dimensions: 120mm bore, 150mm OD, 16mm width. |
| C | 15° Contact Angle | Optimized for combined radial and axial load capacity. |
| DG | Universal Matchable (Duplex Ground) | The bearing faces are ground to allow for various preloaded arrangements (DB, DF, DT) when paired. |
| A | Extra Light Preload | Minimizes friction and heat generation, ideal for high-speed operation. |
| /P4 | Tolerance Class P4 | Denotes high precision with extremely tight dimensional and running accuracy tolerances. |
71824 CDGA/P4 Bearing Structural Features & Performance Benefits
- High-Precision Construction: Manufactured to P4 tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy for critical applications.
- Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls provide a high dynamic load rating of 7470 lbf and static load rating of 10125 lbf, enabling reliable performance under combined loads.
- High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 16,250 rpm, making it suitable for high-speed spindles.
- Superior Rigidity in Matched Sets: The Universal Matchable (SU) design allows two bearings to be mounted together as a pre-loaded duplex set, significantly increasing system rigidity and moment load capacity.
- Wide Operating Range: The phenolic cage and standard lubrication enable a broad operating temperature range from -30°C to 110°C.
71824 CDGA/P4 Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications demanding high speed, rigidity, and accuracy. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-performance automotive and aerospace transmissions.
- High-Frequency Motors and Spindles: Where minimal runout and vibration are critical.
- Industrial Pumps and Compressors: For efficient and reliable operation.
- Robotics and Automation: Precision joints and rotary axes requiring high positional accuracy.
