7030 CDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7030 CDGA/P4A Bearing Product Overview & Core Advantages
The 7030 CDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Positioned in the P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 15° contact angle is optimized to handle significant combined loads—both radial and axial—in one direction. Featuring a phenolic cage and universal matching capability (SU), it is designed for high-speed operation and can be preloaded in sets to achieve maximum system rigidity and performance in precision machinery.
7030 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7030 | Basic bearing designation: 150 mm bore, 225 mm OD, 35 mm width |
| C | 15° contact angle design |
| DG | Universal matching bearing (can be mounted in any combination) |
| A | Extra light preload classification |
| P4A | Ultra-precision tolerance class with enhanced running accuracy requirements |
7030 CDGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling the bearing to achieve a limiting speed of 11,000 rpm. This makes it ideal for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance standards with extremely tight dimensional tolerances on all bearing components, ensuring minimal runout and vibration for superior positioning accuracy.
Universal Matching Design: As a Universal Matchable (SU) bearing, multiple 7030 CDGA/P4A bearings can be mounted together in any combination to create preloaded sets, significantly enhancing system rigidity and load distribution.
Optimized Load Capacity: With a 15° contact angle and precision-ground raceways, this bearing effectively handles combined radial and axial loads, featuring a dynamic load rating of 38,700 lbf and static load rating of 42,750 lbf.
7030 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers, grinding spindles
- Precision Gearboxes - Industrial transmission systems requiring minimal backlash
- High-Speed Motors - Electric motors and generators operating at elevated speeds
- Aerospace Systems - Actuators, control surface mechanisms, and auxiliary power units
- Medical Equipment - CT scanners, dental handpieces, and laboratory instrumentation
