S71902 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71902 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.016 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
15 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
848 lbf
Radial static load rating
405 lbf
Limiting speed
53 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:
$ 159.49
/ each
In Stock
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S71902 ACD/P4A Bearing Product Overview & Core Advantages
The S71902 ACD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single-row bearing with a 25° contact angle and P4 (ABEC-7) tolerance class, it delivers superior running accuracy and rigidity. Its key advantages include the ability to accommodate combined radial and axial loads simultaneously, optimized for high-speed operation up to 53,000 rpm, and featuring factory-applied lubrication for immediate use. The compact design with a 15 mm bore makes it ideal for space-constrained, high-reliability applications.
S71902 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1902 | Standard size designation (15 mm bore, 28 mm OD, 7 mm width). |
| ACD | Contact angle of 25°. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
S71902 ACD/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, providing stable support for spindles and precise shafts.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads efficiently, making it suitable for applications with complex loading conditions.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 53,000 rpm, reducing centrifugal forces and friction for smooth operation.
- Sealed & Lubricated for Life: As a sealed and pre-lubricated bearing, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71902 ACD/P4A Bearing Typical Application Areas
This high-precision bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Grinding & Milling Heads
- Precision Instrumentation
- Medical & Dental Equipment
- High-Frequency Motors & Spindles
