71940 ACD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71940 ACD/P4ADGC
Basic Information
System of measurement
Metric
Weight
12.2 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
280 mm
Outside diameter tolerance
-0.004mm to 0
Width
76 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
73125 lbf
Radial static load rating
112500 lbf
Limiting speed
16.25 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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71940 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 71940 ACD/P4ADGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, this bearing excels in high-speed scenarios while supporting significant combined loads (radial and axial). Its universal matchable (SU) design allows for flexible mounting in preloaded pairs, delivering superior system stiffness and operational reliability in demanding industrial environments.
71940 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71940 | Basic bearing series and size designation |
| AC | Angular Contact design with a 25° contact angle |
| D | High load capacity internal design |
| P4A | High precision tolerance class exceeding ABEC 7 |
| DGC | Universal Matchable (SU) bearing for duplex mounting |
71940 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with a 25° contact angle, this bearing provides exceptional running accuracy and system stiffness, crucial for precision machinery.
- Superior Load Capacity: The optimized internal geometry and chrome steel construction enable high dynamic (73,125 lbf) and static (112,500 lbf) load ratings, effectively handling combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic cage ensures stable operation at high speeds, with a limiting speed of 16,250 rpm.
- Universal Matching Capability: The Universal Matchable (SU) designation allows two bearings to be mounted in a preloaded arrangement (back-to-back, face-to-face, or tandem) without selective shimming, simplifying installation and enhancing performance.
71940 ACD/P4ADGC Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- High-Frequency Motors
