71919 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71919 ACD/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
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
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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71919 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71919 ACD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded to Moderate / Class C standards, delivering superior rotational stability and stiffness. Its primary advantage lies in its ability to handle combined loads—significant radial and thrust loads in both directions—simultaneously. Manufactured to a P4A tolerance class, it ensures high running accuracy, making it ideal for high-performance machinery where precision and reliability are paramount.
71919 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71919 ACD/P4ADBC provides detailed technical specifications through its suffixes:
- 71919: Basic bearing series, indicating a light series angular contact bearing with a 95mm bore.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a Duplex (two-bearing) set.
- P4A: Denotes a very high precision tolerance class, exceeding ABEC 7 standards.
- DB: Specifies the Duplex Back-to-Back mounting arrangement.
- C: Indicates the Moderate preload level (Class C).
71919 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid, moment-resistant bearing system, essential for applications with high overturning moments. The moderate preload (Class C) eliminates internal clearance, enhancing shaft positioning accuracy and system stiffness.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 17,122 lbf, this bearing is engineered to support substantial combined radial and axial loads from both directions.
- Precision Performance: Manufactured to P4A tolerance standards with a phenolic cage, this bearing ensures smooth operation, low vibration, and high running accuracy, which is critical for high-speed applications up to 16,000 rpm.
- Durable Construction: Components made from chrome steel for both rings and balls provide excellent wear resistance and longevity, suitable for a wide operating temperature range from -30°C to 110°C.
71919 ACD/P4ADBC Bearing Typical Application Areas
The 71919 ACD/P4ADBC is ideally suited for high-precision, high-stiffness applications, including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
