S71909 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71909 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.13 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
6.35 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1440 lbf
Limiting speed
25 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:
$ 423.55
/ each
In Stock
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S71909 ACE/P4A Bearing Product Overview & Core Advantages
The S71909 ACE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to accommodate combined loads, primarily handling axial loads in one direction while also supporting significant radial loads. Its compact design, featuring a 12 mm width, makes it ideal for space-constrained, high-reliability applications such as precision spindles. The bearing comes preloaded and pre-lubricated from the factory, ensuring immediate operational readiness and consistent performance.
S71909 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| ACE | Specific internal design with a 25° contact angle and optimized internal geometry. | Provides an excellent balance between axial and radial load capacity. |
| P4A | Denotes a P4 (ABEC-7) tolerance class and specific running accuracy. | Ensures extremely low vibration and noise for smooth, high-precision operation. |
S71909 ACE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing offers exceptional dimensional stability and minimal runout, crucial for high-speed applications. The 25° contact angle is optimized for robust axial load support.
- Optimized Load Capacity: The single-row design with a high-grade chrome steel construction and 21 precision balls delivers a dynamic load rating of 2194 lbf and a static load rating of 1440 lbf, reliably handling combined loads.
- High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 25,000 rpm. The pre-applied lubrication minimizes friction and heat generation at high rotational speeds.
- Sealed & Ready-to-Use: As a sealed bearing, it is protected from contamination and comes pre-lubricated, offering a long service life and maintenance-free operation within its specified temperature range of -30°C to 110°C.
S71909 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles, and robotics.
- Medical Equipment: Dental handpieces, centrifuges, and scanner assemblies.
- Aerospace & Defense: Gyroscopes, navigation systems, and actuator mechanisms.
