71919 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71919 ACD/P4ADBA
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 Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71919 ACD/P4ADBA is a super-precision angular contact ball bearing designed for the most demanding applications. As part of a matched duplex set in a back-to-back (DB) arrangement, it offers exceptional system rigidity and rotational accuracy. This bearing is characterized by its P4A tolerance class and extra light preload (Class A), making it ideal for machine tool spindles and other high-speed, high-precision equipment where minimal deflection and runout are critical.
71919 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Indicates a 25° contact angle and that the bearing is one of a pair in a specific duplex set. |
| P4A | Denotes an ultra-high precision tolerance class exceeding ABEC 7/ISO P4, with enhanced focus on runout and dimensional stability. |
| DB | Specifies the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability under complex loads. |
71919 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High System Rigidity: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing the system's resistance to moment loads and tilting, which is crucial for maintaining machining accuracy.
- Superior Precision and Speed: Manufactured to P4A tolerance standards and featuring a lightweight phenolic cage, this bearing achieves extremely low vibration levels and high limiting speeds, essential for spindle applications.
- Optimized Load Capacity: The 25° contact angle provides an excellent balance, enabling the bearing to handle significant combined radial and axial loads simultaneously.
- Pre-Configured Performance: Supplied as a pre-matched set with extra light preload, these bearings ensure consistent, predictable performance, simplify installation, and eliminate the need for complex preload adjustments.
71919 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is engineered for advanced machinery requiring utmost accuracy and speed.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Machining Centers: Applications demanding minimal thermal growth and vibration.
- Other Precision Rotary Systems: Including high-performance dental handpieces and precision measuring instruments.
