S71903 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71903 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.017 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
30 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
14
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
893 lbf
Radial static load rating
450 lbf
Limiting speed
48 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:
$ 173.3
/ each
In Stock
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S71903 ACD/P4A Bearing Product Overview & Core Advantages
The S71903 ACD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single-row bearing, it is engineered to accommodate high combined loads, primarily thrust loads in one direction, with a contact angle of 25°. Manufactured to the stringent P4 (ABEC-7) tolerance class, it ensures superior running accuracy and high-speed capability. Its compact design, with a 17 mm bore and 7 mm width, makes it ideal for space-constrained, high-performance assemblies where high rigidity and precision are paramount.
S71903 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1903 | Standard size code denoting a 17 mm bore, 30 mm OD, and 7 mm width. |
| ACD | Contact angle of 25° and a specific internal design optimized for high-speed operation. |
| P4A | Indicates a P4 (ABEC-7) tolerance class and a light preload (A) for enhanced rigidity and reduced runout. |
S71903 ACD/P4A Bearing Structural Features & Performance Benefits
- High Precision and Rigidity: The P4 tolerance class and preload (A) ensure minimal axial and radial runout, providing exceptional rotational accuracy and system stiffness, which is critical for high-speed spindles.
- Optimized Load Capacity: With a 25° contact angle, this bearing is engineered to handle significant thrust loads in one direction while also supporting substantial radial loads, making it suitable for combined load applications.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 48,000 rpm. The optimized internal geometry further enhances dynamic performance.
- Durability and Reliability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life under demanding operating conditions.
S71903 ACD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery requiring high rotational speeds and accuracy, including:
- Machine Tool Spindles
- High-Speed Grinding Spindles
- Precision Drilling Heads
- High-Frequency Motors
- Medical and Dental Handpieces
- Aerospace Instrumentation
