7017 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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7017 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7017 ACDGA/P4A is a high-precision single row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Its 25° contact angle and P4A super-precision tolerance class enable it to handle combined radial and axial loads simultaneously with superior running accuracy. The bearing is pre-lubricated and features a phenolic resin cage, contributing to its high-speed capability and smooth operation. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, making it an ideal choice for high-rigidity and high-speed spindles.
7017 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7017 | Standard bearing series; 85mm bore, 130mm OD, 22mm width | Defines the core bearing dimensions. |
| AC | Angular Contact design | Optimized for combined loads. |
| DGA | Universal Matchable bearing (SU designation) | Can be paired in various arrangements (e.g., back-to-back, face-to-face) to achieve desired preload and stiffness. |
| P4A | Tolerance class superior to ABEC 7 / ISO P4 | Guarantees extremely tight dimensional and running accuracy for high-precision applications. |
7017 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction provide excellent resistance to both radial and axial loads, ensuring stable performance under combined loading conditions.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication allow for a high limiting speed of 17,000 rpm, making it a true high-speed bearing.
- Exceptional Running Accuracy: Manufactured to P4A super-precision tolerances, this bearing minimizes vibration and runout, which is critical for applications requiring high positional accuracy and surface finish quality.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be supplied in sets of two or more (commonly 4) and assembled in various configurations to achieve specific preload levels (e.g., extra light preload "A") without selective mounting, simplifying installation and enhancing system performance.
7017 ACDGA/P4A Bearing Typical Application Areas
The 7017 ACDGA/P4A is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- Robotics: High-accuracy joints and actuators.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
