7019 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7019 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
1.21 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
24 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
18428 lbf
Radial static load rating
18000 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7019 CDGB/P4A Bearing Product Overview & Core Advantages
The 7019 CDGB/P4A is a super-precision angular contact ball bearing designed for the most demanding applications. Engineered to a P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its primary advantage lies in its ability to support combined loads—handling significant radial loads alongside high axial loads in one direction. The Universal Matchable (SU) designation allows for precise preloading when mounted with other bearings, making it ideal for high-rigidity, high-speed spindle systems requiring uncompromising performance and reliability.
7019 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 | Basic bearing series and size designation (95mm bore, 145mm OD, 24mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| DGB | Indicates a Light preload (Class B) and that the bearing is part of a Universal Matchable (SU) set, allowing for precise axial play adjustment. |
| P4A | Denotes an ultra-high precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration for critical applications. |
7019 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single-row design, combined with a 15° contact angle and high-grade chrome steel construction, provides excellent resistance to deformation under combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 15,000 rpm. The optimized ball quantity and diameter further enhance dynamic balance.
- Precision and Stability: Manufactured to P4A tolerances with extremely tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees consistent, high-accuracy performance.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be supplied in sets of three for simplified mounting and precise preload control, eliminating complex calculations and ensuring optimal system stiffness.
7019 CDGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring minimal vibration.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
