S71901 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71901 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.005mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
574 lbf
Radial static load rating
266 lbf
Limiting speed
75 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 124.31
/ each
In Stock
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S71901 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71901 ACD/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a preload, enabling it to handle combined radial and axial loads simultaneously with high rigidity. Manufactured to P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. The combination of a ceramic ball material and a phenolic cage contributes to its high-speed capabilities, low friction, and extended service life, making it an ideal solution for demanding, high-rotation applications.
S71901 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71901 ACD/HCP4A provides detailed technical specifications:
- S7: High-precision bearing series.
- 1901: Standard size designation (12mm bore, 24mm OD, 6mm width).
- ACD: Angular Contact design with a 25° contact angle.
- HCP4A: Denotes a preloaded set matched to P4 (ABEC-7) tolerance class.
S71901 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The preload eliminates internal clearance, providing high system stiffness and precise shaft positioning, which is critical for applications like machine tool spindles.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic (Si3N4) balls reduce centrifugal forces, allowing for a high limiting speed of 75,000 rpm.
- Extended Service Life and Reliability: Ceramic balls offer excellent wear resistance, lower thermal expansion, and electrical insulation properties compared to standard steel balls, significantly enhancing bearing life in harsh conditions.
- Optimized for Combined Loads: The 25° contact angle is optimally designed to support significant axial loads in addition to radial loads.
S71901 ACD/HCP4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles
- Precision Grinding Machines
- Dental and Medical Handpieces
- Aerospace Actuators and Instrumentation
- High-Frequency Motors and Spindles
