71920 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71920 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
1.6 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21938 lbf
Radial static load rating
29700 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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:
$ 714.94
/ each
In Stock
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71920 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71920 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads efficiently, offering high running accuracy and stability. Its Universal Matchable (SU) design allows for flexible mounting in pairs to support complex load configurations, making it an ideal choice for high-performance spindles and precision machinery where reliability is paramount.
71920 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71920 CD/P4ADGB is decoded as follows:
- 71920: Denotes the bearing series and size (100mm bore, 140mm OD, 40mm width).
- C: Indicates a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- D: Signifies a Light preload (Class B), which enhances system rigidity and minimizes deflection under operational loads.
- P4A: Represents the ultra-precision tolerance class, ensuring extremely tight dimensional and running accuracy for demanding applications.
- DGB: Specifies a Universal Matchable (SU) paired set of two bearings, pre-configured for optimal performance in duplex arrangements.
71920 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design with a 15° contact angle and light preload provides superior stiffness, minimizing axial and radial play. This ensures precise shaft positioning and is critical for applications like machine tool spindles.
- Exceptional Load Capacity: Engineered to support significant combined radial and axial loads. With a dynamic load rating of 21,938 lbf and a static load rating of 29,700 lbf, it offers reliable performance under strenuous conditions.
- Optimized High-Speed Performance: The phenolic resin cage reduces centrifugal forces and friction, contributing to a high limiting speed of 16,000 rpm. This makes it suitable for high-speed applications.
- Precision-Matched for Consistency: As a Universal Matchable (SU) set, the two bearings are manufactured to exacting standards, ensuring uniform preload and runout when mounted face-to-face, back-to-back, or in tandem.
71920 CD/P4ADGB Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Rotary Tables: Indexing and positioning systems in CNC machining and measurement equipment.
- High-Frequency Spindles: Applications in PCB drilling and precision engraving.
- Industrial Pumps and Compressors: Where reliable operation under combined loads is essential.
