7219 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7219 ACDGA/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
25 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
29925 lbf
Radial static load rating
25650 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
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In Stock
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7219 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7219 ACDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, it delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads (radial and axial loads simultaneously) efficiently, making it ideal for high-speed spindles and precision machinery. The bearing comes pre-lubricated and is universally matchable, allowing for flexible mounting arrangements in duplex sets to control axial play and increase system rigidity.
7219 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7219 | Basic bearing designation: 95 mm bore, 170 mm OD, 32 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Designates a Universal Matchable (SU) bearing, supplied in a set of 2 for duplex mounting (Back-to-Back or Face-to-Face). |
| P4A | Indicates a high-precision tolerance class with very tight dimensional and running accuracy tolerances. |
7219 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined radial and axial loads. When mounted in a matched pair, the system rigidity is dramatically increased.
- Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration, which is critical for high-speed operation. The lightweight phenolic resin cage contributes to lower centrifugal forces, supporting a high limiting speed of 15,000 rpm.
- Optimized Internal Geometry: Precision-ground chrome steel rings and balls, along with a carefully calculated ball quantity (15) and ball diameter (23.812 mm), ensure smooth operation and long service life.
- Convenience & Versatility: Being universally matchable and pre-lubricated simplifies installation and inventory management for complex spindle arrangements.
7219 ACDGA/P4A Bearing Typical Application Areas
This bearing is engineered for demanding applications where precision and speed are paramount. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and precision grinding equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM industrial motors.
- Robotics: High-accuracy joints and rotary axes.
