71824 ACD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71824 ACD/P4DGC
Basic Information
System of measurement
Metric
Weight
1.1 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
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
8.731 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11408 lbf
Radial static load rating
19125 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71824 ACD/P4DGC Bearing Product Overview & Core Advantages
The 71824 ACD/P4DGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded pair, it delivers superior performance in handling combined radial and axial loads. Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery where reliability and dimensional stability are critical.
71824 ACD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71824 | Basic bearing designation indicating the series and size (120mm bore, 150mm OD). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Signifies a Moderate Preload (Class C), providing enhanced rigidity and reduced deflection under operational loads. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| DGC | Denotes the bearing is universal matchable (SU) and supplied as one of a pair in a set, allowing for flexible mounting configurations (DB, DF, DT). |
71824 ACD/P4DGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle and moderate preload enables the bearing to handle significant combined loads (Radial dynamic: 11408 lbf, Static: 19125 lbf) while maintaining system stiffness.
- Precision & High-Speed Performance: Manufactured to P4 tolerance standards with a phenolic cage, this bearing achieves a high limiting speed of 16,250 rpm. The cage material offers excellent strength-to-weight ratio and is suitable for high rotational speeds.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be paired with another identical bearing in various arrangements (back-to-back, face-to-face, or tandem) to accommodate complex load conditions and moment loads, providing exceptional design flexibility.
- Durable Construction: Components made from chrome steel for both rings and balls ensure high durability, wear resistance, and a long operational life within a temperature range of -30°C to 110°C.
71824 ACD/P4DGC Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring high precision and speed.
- High-Speed Motors and Spindles: In applications demanding minimal runout and high rotational accuracy.
- Precision Gearboxes and Transmission Systems: Where rigid support for shafts under combined loads is essential.
- Industrial Pumps and Compressors: For reliable operation in demanding fluid handling equipment.
