S71910 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71910 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
2205 lbf
Limiting speed
16 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:
$ 485.26
/ each
In Stock
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S71910 ACD/P4A Bearing Product Overview & Core Advantages
The S71910 ACD/P4A is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing, it is optimized to support combined loads, carrying significant radial loads and one-directional axial loads simultaneously. Its P4 (ABEC-7) tolerance class ensures ultra-precise running, making it ideal for high-speed spindles and other demanding machinery where minimal runout and vibration are critical. The bearing comes preloaded and lubricated from the factory, simplifying installation and ensuring immediate, reliable operation.
S71910 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71910 | Basic model number denoting a 50 mm bore, 72 mm OD, 12 mm width bearing from the 719 series. |
| ACD | Signifies a 25° contact angle and a specific internal design optimized for high stiffness and speed. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with enhanced running accuracy and dimensional stability. |
S71910 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and P4 precision grade provide superior stiffness and rotational accuracy, essential for applications like machine tool spindles to minimize deflection under load.
- Optimized Load Capacity: Engineered to handle combined radial and axial loads efficiently. The dynamic load rating of 2858 lbf and static load rating of 2205 lbf demonstrate its robust performance.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 16,000 rpm. This makes it a true high-speed bearing.
- Ready-to-Install Performance: The bearing is supplied with preload and factory-applied lubrication, ensuring optimal performance from the start without requiring initial setup or greasing.
- Durable Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and a long service life under demanding conditions.
S71910 ACD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (e.g., milling, grinding, and lathe spindles)
- High-Frequency Motors and Spindles
- Precision Robotic Drives and Gearboxes
- Medical and Dental Equipment Spindles
- Aerospace Instrumentation and Control Systems
