71900 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71900 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 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
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
878 lbf
Radial static load rating
477 lbf
Limiting speed
95 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
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71900 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71900 ACD/P4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a universal matchable (SU) bearing supplied in a pre-set duplex pair, it is engineered to accommodate combined radial and axial loads simultaneously. Its P4A tolerance class and extra light preload (Class A) ensure exceptional running accuracy and rotational stability, making it ideal for spindles requiring the highest levels of precision and reliability.
71900 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71900 ACD/P4ADGA provides detailed technical specifications:
- 71900: Basic series designation for a super-precision, miniature angular contact ball bearing.
- A: Denotes a 25° contact angle, optimized for high axial load capacity.
- C: Indicates a phenolic (polyamide) cage, contributing to low friction and high-speed capability.
- D: Specifies that the bearing is supplied as a universal matchable (SU) duplex pair, pre-configured for immediate installation.
- P4A: The tolerance class, signifying ultra-precision geometric and running accuracy exceeding standard ABEC 7 (P4) levels.
- DGA: Indicates the specific preload grade – in this case, Extra Light (Class A).
71900 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair arrangement provides significantly increased system rigidity, enabling stable operation under combined radial and axial loads. The 25° contact angle is specifically chosen to handle substantial thrust loads.
- Superior High-Speed Performance: The lightweight phenolic cage (C) ensures excellent dimensional stability and low centrifugal forces, which is critical for achieving the high limiting speed of 95,000 rpm. The open design facilitates efficient lubrication and cooling.
- Ultra-Precision Operation: Manufactured to a P4A tolerance class with a very tight bore and outside diameter tolerance of -0.004mm to 0, this bearing guarantees minimal runout and vibration for superior application performance.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, any two bearings can be paired together in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective matching, simplifying procurement and assembly.
71900 ACD/P4ADGA Bearing Typical Application Areas
This bearing is the preferred choice in applications where extreme precision, high speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Spindles: For PCB drilling, precision grinding, and micro-machining.
- Precision Instrumentation: Gyroscopes, optical encoders, and high-resolution scanners.
- Medical & Dental Equipment: High-speed handpieces and laboratory automation tools.
- Aerospace & Defense Systems: Guidance systems and avionics requiring reliable, precision rotation.
