7015 ACDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7015 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7015 ACDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a 25° contact angle and Extra Light (Class A) preload, it is optimized to handle combined loads—significant radial loads and thrust loads in one direction. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-reliability, high-rigidity spindles and precision machinery. The bearing is universally matchable (SU), allowing for precise axial preload control when mounted in pairs, back-to-back (DB) or face-to-face (DF).
7015 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7015 | Basic series & size code (75mm bore, 115mm OD, 20mm width) | Defines the core bearing dimensions. |
| AC | Angular Contact design with a 25° contact angle | Optimized for high-speed operation and thrust load capacity. |
| D | High ball count and optimized internal geometry | Enhances load rating and stiffness. |
| GA | Preload class: Extra Light (Class A) | Minimizes friction and heat generation, ideal for very high speeds. |
| P4A | Tolerance class superior to ABEC 7 / ISO P4 | Guarantees ultra-high precision and running accuracy for critical applications. |
7015 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The bearing's 25° contact angle and robust internal design, featuring 20 balls of 12.7 mm diameter, provide high resistance to deformation under combined radial and axial loads (Dynamic Load Rating: 11115 lbf, Static Load Rating: 10462 lbf).
- Superior High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower centrifugal forces and stable operation at the high limiting speed of 31,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision and Stability: Manufactured to P4A tolerance class with tight dimensional controls on bore, outer diameter, and width, this bearing ensures minimal runout and vibration, which is critical for machining accuracy and surface finish.
- Universal Matching Capability (SU): This feature allows two identical 7015 ACDGA/P4A bearings to be universally matched, simplifying assembly and enabling precise control over preload and system rigidity in duplex sets.
7015 ACDGA/P4A Bearing Typical Application Areas
The 7015 ACDGA/P4A is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC machinery.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
