7017 CD/P4ADBA
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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Product Overview and Core Advantages
The 7017 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior high rigidity and the ability to withstand combined loads, including significant moment loads. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and consistent high-speed performance. The extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-precision spindles and other critical machinery.
7017 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series, indicating a metric angular contact bearing with an 85 mm bore, 130 mm OD, and 44 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings supplied as a matched set). |
| DB | Specifies the Back-to-Back arrangement of the duplex pair, which provides high moment stiffness. |
| P4A | The tolerance class, signifying very high precision for both dimensional and running accuracy. |
| Open | The bearing is supplied without seals or shields, allowing for custom lubrication schemes and maximum speed capability. |
Structural Features and Performance Benefits
High Rigidity and Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, stable support base, significantly increasing the bearing's resistance to moment loads and providing exceptional high rigidity for precise shaft positioning.
Optimized for High-Speed Operation: The phenolic cage is lightweight and exhibits excellent performance at high rotational speeds, contributing to the bearing's high limiting speed of 28,000 rpm. The 15° contact angle further reduces heat generation and centrifugal forces.
Superior Load Ratings: With a dynamic load rating of 24,975 lbf and a static load rating of 29,025 lbf, this bearing is engineered to handle significant combined loads (radial and axial) over a long operational life.
Precision Engineering: The P4A tolerance class and tight dimensional tolerances on the bearing dimensions (bore, OD, width) ensure smooth, quiet, and vibration-free operation, which is critical for high-precision applications.
7017 CD/P4ADBA Bearing Typical Application Areas
The 7017 CD/P4ADBA is ideally suited 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: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Where low vibration and high rotational accuracy are required.
- Industrial Pumps and Compressors: For applications demanding high reliability and load capacity.
