S71901 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71901 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.011 kg
Tolerance class
P4 (ABEC-7)
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
-0.005mm 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° to 110 °C
Radial dynamic load rating
574 lbf
Radial static load rating
266 lbf
Limiting speed
63 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 124.3
/ each
In Stock
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S71901 ACD/P4A Bearing Product Overview & Core Advantages
The S71901 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a preload, ensuring high system rigidity, precise rotational accuracy, and minimal runout. Its compact design, with a 12 mm bore and 6 mm width, makes it ideal for high-speed spindles and other space-constrained precision machinery. The bearing is pre-lubricated and sealed for immediate use and long-term, maintenance-free operation.
S71901 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (AISI 440C) bearing rings and balls |
| 7 | Angular Contact Ball Bearing |
| 19 | Series designation (Light series, extra-small cross-section) |
| 01 | Bore diameter code (01 corresponds to 12 mm) |
| ACD | Contact Angle of 25° |
| P4 | High Precision Tolerance Class (ABEC-7 equivalent) |
| A | Internal design and preload specification |
S71901 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and application of a preload eliminate internal clearance, providing high axial and radial stiffness. This is critical for applications requiring minimal deflection under load and exceptional rotational accuracy.
- Optimized for Combined Loads: As an angular contact ball bearing, it is engineered to support significant combined loads (simultaneous radial and axial forces), making it superior to deep groove ball bearings in such demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry contributes to a high limiting speed of 63,000 rpm, ideal for high-speed applications.
- Sealed and Lubricated for Life: The integrated seals protect against contamination, and the factory-applied lubricant ensures consistent performance across the specified temperature range (-30°C to 110°C), offering a maintenance-free solution.
S71901 ACD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Medical and Dental Handpieces
- Optical Scanners and Encoders
- Aerospace Instrumentation
