S71924 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71924 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
1.21 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.004mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16380 lbf
Radial static load rating
19462 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Grease
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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S71924 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71924 ACDGA/P4A is a super-precision double row angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads in both directions, this bearing features a compact cross-section and is manufactured to the stringent P4A tolerance class. Its universal matchable (SU) design allows for flexible mounting configurations in preloaded sets, making it an ideal choice for high-speed spindles and other precision machinery requiring superior running accuracy and operational reliability.
S71924 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S71924 | Bearing series and size designation | Denotes a 120mm bore, 165mm OD, 22mm width double row angular contact ball bearing. |
| ACD | Angular Contact, Double Row design | Optimized for high rigidity and combined load capacity. |
| GA | Light preload (Class A) | Reduces deflection and improves shaft positioning accuracy under light loads. |
| P4A | Super Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for high-performance applications. |
S71924 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and 25-degree contact angle provide superior stiffness, enabling the bearing to effectively support combined radial and axial loads from both directions, with a high dynamic load rating of 16,380 lbf.
- Precision & Speed Performance: Manufactured to P4A super precision standards with exceptionally tight bore and OD tolerances. The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 11,000 rpm, making it a true high-speed bearing.
- Universal Matching & Simplified Assembly: As a Universal Matchable (SU) bearing, the S71924 ACDGA/P4A can be mounted in any combination (back-to-back, face-to-face, or tandem) with other bearings from the same universal matching set to achieve the desired preload and stiffness without selective assembly.
- Sealed & Pre-Lubricated: The sealed construction and factory-applied grease lubrication protect against contamination and provide long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71924 ACDGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: High-accuracy measuring devices and rotary tables.
- High-Frequency Motors & Spindles: Motors and direct-drive systems requiring minimal runout and vibration.
- Robotics: Articulated arms and precision joints.
