71919 ACD/P4ADFD
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71919 ACD/P4ADFD
Basic Information
System of measurement
Metric
Weight
1.16 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
95 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17122 lbf
Radial static load rating
23400 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71919 ACD/P4ADFD Bearing Product Overview & Core Advantages
The 71919 ACD/P4ADFD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex bearing features a Face-to-Face (DF) matched arrangement and a Heavy preload (Class D), making it ideal for applications subjected to combined loads and requiring minimal axial and radial runout. Manufactured to a P4A tolerance class, it delivers superior rotational accuracy and high-speed capability, supported by a phenolic cage for optimal performance.
71919 ACD/P4ADFD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design, 25° contact angle |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards |
| DF | Duplex Face-to-Face matched arrangement |
| D | Heavy preload classification |
71919 ACD/P4ADFD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex DF arrangement and heavy preload provide exceptional system stiffness, enabling the bearing to withstand significant combined radial and axial loads (Dynamic: 17,122 lbf, Static: 23,400 lbf).
- Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration. The phenolic cage contributes to lower friction and higher limiting speeds (16,000 rpm), making it suitable for high-speed applications.
- Optimized Internal Geometry: A 25° contact angle and 28 high-precision chrome steel balls provide a large load-carrying capacity and smooth operation.
- Thermal Stability: The phenolic cage material offers good dimensional stability across the specified temperature range (-30°C to 110°C).
71919 ACD/P4ADFD Bearing Typical Application Areas
This bearing is engineered for high-performance machinery, including:
- Machine Tool Spindles
- High-Speed Grinding & Milling Heads
- Precision Gearboxes
- Industrial Pumps & Compressors
- Robotic Arm Joints & Precision Rotary Tables
