7207 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7207 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7207 ACDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Operating under the stringent P4A tolerance class, this bearing is designed to handle significant combined loads—simultaneously supporting radial loads and thrust loads in one direction. Its 25° contact angle optimizes it for high axial load capacity. The bearing is universally matchable (SU), allowing for precise preload control when mounted in pairs or sets, making it ideal for high-rigidity and high-speed spindles and precision machinery where minimal runout and maximum stability are critical.
7207 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| 7207 | Standard bore diameter (35 mm), outside diameter (72 mm), and width (17 mm) designation. | Defines the core bearing dimensions for interchangeability and housing design. |
| AC | Angular Contact design. | Optimized for combined radial and axial loads. |
| DGA | Specific internal design and contact angle (25°). | Provides a high thrust load capacity and is universally matchable (SU) for precise preload setting. |
| P4A | Super Precision Tolerance Class. | Guarantees extremely tight dimensional and running accuracy, essential for high-speed, high-precision applications. |
7207 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with exceptionally tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and superior rotational accuracy, which is critical for machine tool spindles and other precision equipment.
- Superior Load Capacity: The 25° contact angle and robust internal geometry enable the bearing to handle high combined loads effectively. With a dynamic load rating of 6908 lbf and a static load rating of 4680 lbf, it offers reliable performance under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces and inertial friction, contributing to a high limiting speed of 41,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
- Premium Material Construction: Manufactured from high-grade chrome steel for both rings and balls, ensuring high hardness, wear resistance, and long service life. The phenolic cage offers excellent strength and dimensional stability at high speeds.
7207 ACDGA/P4A Bearing Typical Application Areas
The 7207 ACDGA/P4A is specified for high-performance applications where precision, speed, and rigidity are non-negotiable. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical and Laboratory Equipment: Centrifuges and high-speed scanners.
