71901 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.02 kg
Tolerance class
P4A
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
-0.004mm to 0
Width
12 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°C to 110 °C
Radial dynamic load rating
936 lbf
Radial static load rating
531 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 175.27
/ each
In Stock
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71901 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71901 ACD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-set duplex pair, it excels at handling combined radial and axial loads simultaneously. Manufactured to an ultra-precise P4A tolerance class, it offers superior running accuracy, high system rigidity, and reliable operation in demanding environments, making it ideal for high-precision spindles and machinery.
71901 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71901 ACD/P4ADGA is decoded as follows:
- 71901: Denotes the bearing series (719) and size code (01), indicating a super-precision, light-series bearing with a 12mm bore.
- AC: Signifies Angular Contact design with a 25° contact angle.
- D: Indicates the bearing is supplied as a Universal Matchable (DUplex) pair, pre-configured for either back-to-back (DB) or face-to-face (DF) mounting.
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy exceeding ABEC 7/ISO P4 standards.
- DGA: Specifies a light preload (A) applied to the duplex set.
71901 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- Super-Precision & High Rigidity: The duplex pair (SU arrangement) creates a rigid bearing system that minimizes axial and radial deflection under load, ensuring exceptional positional accuracy and stability.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support significant combined loads, making it suitable for applications with high thrust and radial forces.
- High-Speed Capability: The lightweight, durable phenolic resin cage and optimized internal geometry contribute to low friction and enable a high limiting speed of 140,000 rpm, which is critical for spindle applications.
- Pre-Lubricated & Ready-to-Install: The bearing comes pre-lubricated, simplifying installation and ensuring immediate, reliable performance within its specified temperature range of -30°C to 110°C.
71901 ACD/P4ADGA Bearing Typical Application Areas
This bearing is predominantly used in high-precision, high-speed machinery and systems, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling spindles requiring high rigidity and running accuracy.
- Precision Instruments: In measuring devices, optical scanners, and laboratory equipment.
- High-Frequency Motors: As a critical component in the rotors of high-speed electric motors and spindles.
- Robotics: In the joints and arms of precision industrial robots.
