7030 ACD/P4AQGA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 ACD/P4AQGA
Basic Information
System of measurement
Metric
Weight
16.7 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
225 mm
Outside diameter tolerance
-0.004mm to 0
Width
140 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
98100 lbf
Radial static load rating
162000 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
4
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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7030 ACD/P4AQGA Bearing Product Overview & Core Advantages
The 7030 ACD/P4AQGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As part of the Universal Matchable (SU) series, it is engineered to be mounted in sets of four to form a rigid, preloaded system. Its defining features include an Extra light preload (Class A) and a P4A tolerance class, ensuring ultra-precise rotational performance. The 25° contact angle is optimized to handle significant combined loads, managing both radial and axial forces simultaneously. This makes it an ideal solution for high-speed, high-rigidity spindles and other precision machinery.
7030 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7030 | Standard bore diameter (150 mm) and outside diameter (225 mm) designation. |
| ACD | Angular Contact Design, 25° contact angle. |
| P4A | High precision tolerance class, exceeding ABEC-7/ISO P4 standards for running accuracy. |
| QGA | Internal designator for Universal Matchable (SU) bearings with specific preload and tolerance. |
7030 ACD/P4AQGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and ability to be mounted in a Universal Matchable (SU) set of four creates an exceptionally rigid bearing arrangement. This structure is capable of supporting high combined loads, with a dynamic load rating of 98,100 lbf and a static load rating of 162,000 lbf.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 11,000 rpm. The open seal design reduces friction and heat generation.
- Ultra-Precision: Manufactured to a P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees minimal runout and vibration for superior operational accuracy.
- Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and a long operational life.
7030 ACD/P4AQGA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme accuracy and smooth operation.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Industrial Pumps and Compressors: Where reliable performance under combined loads is critical.
