7019 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7019 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
2.42 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
145 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
29925 lbf
Radial static load rating
36000 lbf
Limiting speed
17 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
Light / Class B
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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7019 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7019 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement (DB) provides superior stiffness and the ability to withstand combined radial and axial loads from both directions. Manufactured to P4A tolerance class with a light preload (Class B), it delivers high running accuracy and is ideal for high-speed, high-precision machinery where reliability is paramount.
7019 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 | Basic bearing series, defining the standard boundary dimensions (Bore: 95 mm, OD: 145 mm, Width: 48 mm). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched) set. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards, for applications demanding minimal runout and vibration. |
| DB | Specifies the Back-to-Back mounting arrangement of the duplex pair, providing high moment rigidity. |
7019 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a large effective spread between load centers, significantly increasing the bearing's moment stiffness and ability to handle combined loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 15° contact angle and a lightweight phenolic cage, this bearing achieves smooth operation and a high limiting speed of 17,000 rpm.
- Optimized Internal Geometry: Features 21 precision balls made of chrome steel with a diameter of 15.875 mm, ensuring high dynamic and static load ratings (29,925 lbf / 36,000 lbf).
- Stable Preload: The light preload (Class B) is applied at the factory, eliminating internal clearance and ensuring precise shaft positioning without requiring adjustment during installation.
7019 CD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Frequency Motor Spindles
- Precision Gearboxes and transmission systems
- Industrial Pumps and compressors
- Aerospace & Defense Positioning Systems
