S71901 ACDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71901 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
0.011 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
574 lbf
Radial static load rating
266 lbf
Lubrication
Grease
Matched arrangement
Single
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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In Stock
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S71901 ACDGC/P4A Bearing Product Overview & Core Advantages
The S71901 ACDGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a 25° contact angle and Moderate (Class C) preload, it offers superior rigidity and is capable of handling combined radial and axial loads. Manufactured to the stringent P4A tolerance class, this bearing is sealed and pre-lubricated, ensuring long-term reliability and minimal maintenance in high-precision environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Bearing series and size designation (12mm bore, 24mm OD, 6mm width) |
| AC | Angular Contact design with a 25° contact angle |
| DGC | Duplex arrangement, Ground to universal match standards (SU), with a phenolic cage |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards |
S71901 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and Class C preload provide exceptional system stiffness and minimize deflection under load, which is critical for maintaining accuracy in high-speed spindles.
- Superior High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and grease lubrication enable very high rotational speeds.
- Universal Matching (SU): This bearing is universally matchable, allowing for simplified mounting in duplex pairs (DB, DF, DT) to achieve the required preload and stiffness without selective grinding.
- Sealed and Pre-Lubricated: The integral seals protect against contamination and retain grease, offering a maintenance-free solution with a specified operating temperature range of -30°C to 110°C.
S71901 ACDGC/P4A Bearing Typical Application Areas
This super-precision bearing is ideally suited for applications where high rotational accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring devices, optical scanners.
- High-Frequency Motors and Spindles: PCB drilling spindles, dental handpieces.
- Robotics: High-accuracy joints and actuators.
