S71904 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71904 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.035 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
14
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1053 lbf
Radial static load rating
504 lbf
Limiting speed
52 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:
$ 188.83
/ each
In Stock
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S71904 ACE/P4A Bearing Product Overview & Core Advantages
The S71904 ACE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Operating under the stringent P4 (ABEC-7) tolerance class, it is designed to handle significant combined loads (radial and axial) simultaneously, thanks to its 25° contact angle. This bearing is preloaded and comes sealed and pre-lubricated, making it a compact and ready-to-install solution for high-reliability, high-speed machinery where space is at a premium.
S71904 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71904 ACE/P4A provides detailed technical specifications:
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1904: Denotes the size series; '19' for the series and '04' for a 20mm bore diameter.
- ACE: A manufacturer-specific code often signifying internal design features, optimized internal clearance, and contact angle.
- P4A: Specifies the tolerance class P4 (ABEC-7) and a specific preload level (A).
S71904 ACE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures exceptional running accuracy and dimensional stability, contributing to high system rigidity and low vibration.
- Superior Load Capacity: The 25° contact angle and robust construction enable it to support high combined radial and axial loads efficiently.
- Optimized High-Speed Performance: The lightweight phenolic cage and precision-ground components allow for a high limiting speed of 52,000 rpm, making it an ideal high-speed bearing.
- Sealed and Lubricated for Life: The integral seals protect against contamination, and the factory-applied lubrication ensures long-term, maintenance-free operation within the specified temperature range.
S71904 ACE/P4A Bearing Typical Application Areas
The S71904 ACE/P4A is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Equipment
- High-Speed Pumps and Compressors
- Robotic Arms and Precision Drives
