71922 ACD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 ACD/P4ADGC
Basic Information
System of measurement
Metric
Weight
1.72 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
30825 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71922 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 71922 ACD/P4ADGC is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. 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 moderate preload (Class C) ensure high running accuracy and stable performance under high-speed operation, making it ideal for high-precision, high-rigidity spindles.
71922 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71922 ACD/P4ADGC is decoded as follows:
- 71922: Denotes the bearing series and size (110mm bore, 150mm OD, 40mm width).
- AC: Signifies Angular Contact design with a 25° contact angle.
- D: Indicates the bearing is supplied as a Duplex pair (two bearings).
- P4A: Specifies the super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, with enhanced running accuracy requirements.
- DGC: Represents the Universal Matchable (SU) arrangement. When two such bearings are mounted in a back-to-back (DB) or face-to-face (DF) configuration, a predefined axial clearance or preload is achieved without the need for selective shimming.
71922 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex pair design provides significantly increased system rigidity. The 25° contact angle is optimized to handle substantial combined loads, offering excellent resistance to complex loading conditions.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for maintaining precision in machining and positioning.
- Optimized High-Speed Operation: The lightweight phenolic resin cage ensures stable guidance of the balls with minimal centrifugal force, contributing to a high limiting speed. The bearing is pre-lubricated for immediate operation.
- Universal Matchability: The Universal Matchable (SU) feature allows for simplified installation and consistent preload achievement in DB or DF arrangements, reducing assembly time and complexity.
71922 ACD/P4ADGC Bearing Typical Application Areas
This bearing is predominantly used in high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors and Robotic Drives.
- Medical Equipment: Such as high-speed dental handpieces and imaging device rotors.
