71919 CD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71919 CD/P4ADBC
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
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17842 lbf
Radial static load rating
24750 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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
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71919 CD/P4ADBC Bearing Product Overview & Core Advantages
The 71919 CD/P4ADBC is a duplex back-to-back pair of precision angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This matched set, manufactured to the stringent P4A tolerance class, is preloaded to deliver high rigidity and stable performance under complex combined loads (radial and axial). Its compact design and superior running accuracy make it ideal for high-speed, high-precision spindles and other critical machinery.
71919 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing series, indicating a high-precision angular contact design. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearings are supplied as a duplex pair. |
| DB | Specifies the Back-to-Back arrangement, which provides high moment rigidity and excellent stability. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy and dimensional control. |
| Moderate / Class C Preload | The bearings are pre-matched and preloaded at the factory to ensure optimal stiffness and minimal axial/radial play. |
71919 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, making it suitable for machine tool spindles.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing set to handle significant combined radial and axial loads simultaneously.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to low friction and heat generation, supporting a high limiting speed.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring smooth, quiet, and accurate operation.
- Optimized Design: The open design is factory-lubricated and is suitable for integration into centralized lubrication systems.
71919 CD/P4ADBC Bearing Typical Application Areas
This precision bearing set is engineered for high-performance applications, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling heads requiring high rigidity and accuracy.
- High-Frequency Motors & Spindles: Where high rotational speeds and precise running accuracy are critical.
- Precision Gearboxes & Drive Systems: To support shafts subjected to complex loads.
- Industrial Pumps & Compressors: For applications demanding reliable performance under combined loads.
