S71913 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71913 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.21 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.008mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
3600 lbf
Limiting speed
13 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:
$ 769.78
/ each
In Stock
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S71913 ACD/P4A Bearing Product Overview & Core Advantages
The S71913 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and rigidity. Characterized by a 25° contact angle and P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant combined loads—primarily thrust loads in one direction along with radial loads. Its compact cross-section, with a 13mm width, makes it ideal for space-constrained, high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
S71913 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-capacity internal design, typically involving optimized raceway geometry and ball complement. |
| P4A | Denotes a P4 (ABEC-7) precision tolerance class with specific running accuracy requirements. The 'A' indicates a defined contact angle and preload specification. |
S71913 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust internal geometry enable superior resistance to combined loads, making it exceptionally stable under heavy thrust and radial forces.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 13,000 rpm. This is critical for high-speed spindle applications.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing ensures minimal vibration and precise running accuracy, which is essential for applications like machine tool spindles.
- Optimized Internal Geometry: With 26 precision balls of 7.938mm diameter, the bearing provides a large load-carrying capacity relative to its compact bearing dimensions (65mm bore, 90mm OD).
S71913 ACD/P4A Bearing Typical Application Areas
This precision angular contact bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Medical Equipment Spindles
- Aviation and Aerospace Instrumentation
