71901 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71901 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
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
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
457 lbf
Radial static load rating
191 lbf
Limiting speed
123 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:
$ 103.5
/ each
In Stock
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71901 ACE/P4A Bearing Product Overview & Core Advantages
The 71901 ACE/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads (radial and axial loads simultaneously) efficiently. The 25° contact angle is optimized for high axial load capacity. This single bearing is preloaded, ensuring zero clearance for high stiffness and minimal runout, making it ideal for high-speed and high-accuracy spindles and instruments.
71901 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71901 ACE/P4A provides detailed technical specifications:
- 71901: Standard bearing series and size designation (12mm bore, 24mm OD, 6mm width).
- ACE: Indicates the bearing is Angular Contact and comes with a Preload.
- P4A: Denotes the tolerance class. P4 is equivalent to ABEC-7, signifying very high precision. The 'A' indicates a specific contact angle (25° in this case).
71901 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 precision standards with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy. The specified preload eliminates internal clearance, providing maximum system stiffness.
- Superior Load Capacity: The 25° contact angle is engineered to handle significant axial loads in one direction, in addition to radial loads, making it suitable for combined load applications.
- High-Speed Performance: The lightweight and robust phenolic cage and optimized internal geometry contribute to a high limiting speed of 123,000 rpm, enabling reliable operation in demanding high-speed scenarios.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life under standard operating conditions.
71901 ACE/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Motors
- Precision Instrumentation
- Medical and Dental Handpieces
- Robotic Drives and Encoders
