S71904 ACDTP/P4B
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71904 ACDTP/P4B
Basic Information
System of measurement
Metric
Weight
0.037 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
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1287 lbf
Radial static load rating
686 lbf
Limiting speed
40 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:
$ 188.78
/ each
In Stock
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S71904 ACDTP/P4B Bearing Product Overview & Core Advantages
The S71904 ACDTP/P4B is a single-row angular contact ball bearing engineered for high-precision applications. This P4 (ABEC-7) tolerance class bearing is designed to accommodate combined loads, primarily handling thrust loads in one direction while supporting moderate radial loads. Its compact design, featuring a 20 mm bore and 9 mm width, makes it ideal for space-constrained, high-speed spindles and precision mechanisms. The bearing comes preloaded and pre-lubricated from the factory, ensuring immediate high-performance operation, exceptional running accuracy, and high rigidity.
S71904 ACDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
The model number S71904 ACDTP/P4B is decoded as follows:
- S: Bearing series, denoting a specific internal design for high speeds and precision.
- 7: Identifies the bearing as an Angular Contact type.
- 19: Indicates a specific dimensional series (light and narrow).
- 04: Represents the bore diameter (04 x 5 = 20 mm).
- AC: Angular Contact design with a 25° contact angle.
- DT: Signifies a matched set of two bearings for precise preload and performance.
- P: Denotes a phenolic resin cage, which is lightweight and suitable for high-speed operation.
- P4B: Specifies the tolerance class P4 (ABEC-7), indicating extremely high dimensional and running accuracy.
S71904 ACDTP/P4B Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class standards, this bearing provides exceptional dimensional stability and running accuracy, which is critical for applications like machine tool spindles.
- Optimized Load Capacity: The 25° contact angle is optimized to handle significant one-directional thrust loads in combination with radial loads, making it suitable for applications with demanding combined load requirements.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling higher limiting speeds (up to 40,000 rpm) with minimal friction and heat generation.
- Preloaded and Ready-to-Use: Supplied as a preloaded matched set (DT), the bearing ensures immediate, precise axial positioning and eliminates the need for complex adjustment during installation, delivering consistent high rigidity from the start.
S71904 ACDTP/P4B Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (high-speed milling and grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Robotic Drives and Servo Motors
- Medical and Dental Equipment
