7052 ACD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7052 ACD/P4A
Basic Information
System of measurement
Metric
Weight
25.6 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
260 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
400 mm
Outside diameter tolerance
-0.004mm to 0
Width
65 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
44.45 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
89325 lbf
Radial static load rating
135000 lbf
Limiting speed
4.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
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
Price available upon request.
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7052 ACD/P4A Bearing Product Overview & Core Advantages
The 7052 ACD/P4A is a precision single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction and combined loads, this bearing features P4A super-precision tolerance for minimal runout and vibration. Its phenolic resin cage ensures smooth operation at high speeds, while the 25° contact angle provides optimal axial load capacity. Preloaded and ready for installation, it delivers outstanding performance in high-speed, high-rigidity applications.
7052 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | 25° contact angle, optimized for axial loads | Enhanced axial load capacity and rigidity |
| P4A | Super precision tolerance class | Ultra-low vibration and runout for precision applications |
7052 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal deflection and superior running accuracy under load.
- Optimized Load Capacity: The 25° contact angle and chrome steel construction enable high axial load ratings (Radial dynamic: 89,325 lbf, Static: 135,000 lbf) and excellent combined load performance.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, supporting a limiting speed of 4,500 rpm for demanding high-speed operations.
- Preloaded & Ready: Supplied preloaded, eliminating internal clearance for immediate high-stiffness performance and simplified installation in matched sets.
7052 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring minimal runout and high rigidity.
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and other equipment demanding superior speed and accuracy.
- Precision Instrumentation: Measuring devices, optical scanners, and rotary tables where vibration control is critical.
- Robotic & Automation: High-precision robot joints and rotary actuators requiring reliable, low-friction rotation.
