S71909 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71909 ACB/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
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 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
4.762 mm
Ball quantity
27
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1580 lbf
Radial static load rating
1238 lbf
Limiting speed
24 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:
$ 423.83
/ each
In Stock
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S71909 ACB/P4A Bearing Product Overview & Core Advantages
The S71909 ACB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This sealed single bearing features a phenolic cage and is preloaded, enabling it to handle combined loads with high reliability. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical.
S71909 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACB | Indicates a specific contact angle (25°) and internal design optimized for high rigidity and precise operation. |
| P4A | Denotes a P4 tolerance class (equivalent to ABEC-7), signifying very high precision levels for dimensional and running accuracy. |
S71909 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and preload provide superior axial and radial stiffness, minimizing deflection under load for enhanced machining or operational accuracy.
- Optimized for High Speeds: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 24,000 rpm.
- Robust Load Capacity: Engineered to support significant combined radial and axial loads, with a dynamic load rating of 1580 lbf and a static load rating of 1238 lbf.
- Sealed and Lubricated for Life: The integral seals retain the factory-applied lubricant and effectively shield against contaminants, ensuring long-term, maintenance-free operation within the specified temperature range.
S71909 ACB/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Handpieces
- High-Speed Automation and Robotics
