7028 ACD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7028 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7028 ACD/P4ADGA is a precision angular contact ball bearing manufactured to P4A tolerance class standards. This universal matchable (SU) bearing is designed for high-precision applications requiring exceptional running accuracy and dimensional stability. Its extra light preload (Class A) ensures minimal deflection under operational conditions, making it ideal for machine tool spindles and other precision rotating systems. The bearing's optimized 25° contact angle provides superior performance in handling combined radial and axial loads simultaneously.
Model Code Detailed Explanation
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | 25° Contact Angle, Universal Matchable Design | Optimized for combined loads and universal mounting arrangements |
| P4A | High Precision Tolerance Class | Exceptional running accuracy and dimensional stability |
| DGA | Pre-lubricated with High-performance Grease | Ready for immediate operation with optimized lubrication |
7028 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and running precision.
Optimized Load Capacity: Features a 25° contact angle that provides superior performance in handling combined radial and axial loads, with dynamic load rating of 52,650 lbf and static load rating of 70,875 lbf.
Advanced Cage Design: The phenolic cage material contributes to the bearing's high-speed capability, supporting limiting speeds up to 11,000 rpm while reducing friction and heat generation.
Premium Material Selection: Constructed from chrome steel for both rings and balls (22 balls with 22.225 mm diameter), ensuring high durability and wear resistance in demanding applications.
Universal Matching Capability: Designed as universal matchable (SU) bearings, allowing flexible arrangement in sets of 2 for various mounting configurations and preload requirements.
7028 ACD/P4ADGA Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling machine spindles requiring P4A accuracy
Precision Industrial Equipment: High-speed machining centers, precision grinding machines, and CNC rotary tables
Aerospace Components: Aircraft instrumentation, navigation systems, and auxiliary power units
Medical Equipment: High-speed dental handpieces, medical scanners, and laboratory instrumentation
Robotics and Automation: Precision robotic joints, rotary actuators, and automated positioning systems
