71901 CE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 CE/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
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
776 lbf
Radial static load rating
396 lbf
Limiting speed
165 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
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71901 CE/P4ADGA Bearing Product Overview & Core Advantages
The 71901 CE/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As part of the P4A tolerance class, it offers extremely tight dimensional and running accuracy. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and other precision machinery. The bearing is universally matchable (SU), allowing two bearings to be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to handle combined loads effectively.
71901 CE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71901 CE/P4ADGA provides detailed technical specifications:
- 71901: Basic model number indicating a super-precision, light series angular contact ball bearing with a 12 mm bore.
- C: Represents a 15° contact angle, optimized for high-speed applications with moderate axial load capacity.
- E: Designates a high-capacity internal geometry with an increased number and/or size of balls.
- P4A: Indicates a super-precision tolerance class exceeding ABEC 7 standards, with enhanced running accuracy and controlled preload.
- DG: Signifies that the bearing is universally matchable (SU) and supplied as part of a matched set of 2 bearings.
- A: Denotes an extra light preload (Class A).
71901 CE/P4ADGA Bearing Structural Features & Performance Benefits
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy in machine tool spindles.
- High-Speed Capability: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling a high limiting speed of 165,000 rpm. The cage is lightweight and exhibits excellent performance under high acceleration.
- Optimized Load Capacity: The E-type design incorporates more and/or larger balls, significantly increasing the dynamic and static load ratings compared to standard designs of the same size.
- Universal Matchability (SU): Bearings marked "SU" can be universally paired without selective matching, simplifying installation and ensuring optimal performance in preloaded pairs to handle complex combined radial and axial loads.
- Premium Materials: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability under the specified temperature range.
71901 CE/P4ADGA Bearing Typical Application Areas
This precision bearing is engineered for the most demanding high-speed and high-accuracy applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy gearboxes.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
