7219 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7219 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
2.7 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
170 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
31050 lbf
Radial static load rating
27000 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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7219 CDGA/P4A Bearing Product Overview & Core Advantages
The 7219 CDGA/P4A is a single-row angular contact ball bearing designed for applications demanding ultra-high precision and exceptional rotational accuracy. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 15° contact angle is optimized for handling combined loads, efficiently supporting significant radial loads alongside axial loads in one direction. The Extra light (Class A) preload ensures minimal deflection and vibration, making it ideal for high-speed, high-rigidity applications such as precision machine tool spindles.
7219 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| CDGA | Universal Matchable Bearing with Extra Light Preload | Indicates the bearing is universally matchable (SU) and comes with a specific preload classification (A). This allows for precise axial play adjustment when mounted in pairs, ensuring optimal system rigidity. |
| P4A | High-Precision Tolerance Class | Denotes a super-precision tolerance level, with extremely tight controls on bore, outer diameter, and width tolerances for superior running accuracy. |
7219 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design, combined with P4A tolerances and Extra light preload, provides exceptional system stiffness and minimizes operational runout, which is critical for machining accuracy.
- Superior Load Capacity: With a dynamic load rating of 31,050 lbf and a static load rating of 27,000 lbf, the bearing is engineered to handle demanding combined radial and axial loads.
- Optimized High-Speed Performance: The phenolic resin cage offers low weight and excellent performance at high speeds, contributing to a limiting speed of 15,000 rpm. The standard lubrication is suitable for the specified operating range.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long service life under demanding conditions.
7219 CDGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high rotational speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motors and spindles.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instruments.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
