7017 CD/P4ADBD
7000 Series Super Precision Angular Contact Ball Bearings
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7017 CD/P4ADBD Bearing Product Overview & Core Advantages
The 7017 CD/P4ADBD is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement is preloaded to Class D (Heavy), providing superior stiffness and rotational accuracy. It is engineered to handle combined loads (radial and axial) simultaneously, making it ideal for high-precision spindles and machinery where high rigidity and minimal deflection are critical. Manufactured to P4A tolerance class, it guarantees exceptional running accuracy and consistent performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series, indicating a metric angular contact ball bearing with 85 mm bore, 130 mm OD, and 44 mm width. |
| C | 15° contact angle, optimized for carrying significant axial loads. |
| D | Indicates a duplex (two-bearing) set. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy. |
| DB | Back-to-Back arrangement. This configuration provides high moment rigidity and excellent stability under complex load conditions. |
7017 CD/P4ADBD Bearing Structural Features & Performance Benefits
- Superior Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement with a heavy preload (Class D) creates an extremely rigid bearing system. This design effectively resists moment loads and provides exceptional support for combined radial and axial loads.
- High-Speed Capability: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the limiting speed of 28,000 rpm. The 15° contact angle is well-suited for high-speed applications.
- Precision Performance: Manufactured to P4A tolerance class with very tight bore, outside diameter, and width tolerances, this bearing ensures minimal runout and superior rotational accuracy for precision machinery.
- Durable Construction: Components made from chrome steel (rings and balls) offer high hardness, wear resistance, and long service life under demanding conditions.
- Optimized Internal Geometry: With 21 balls of 14.288 mm diameter, the bearing is designed for high dynamic and static load ratings (24,975 lbf and 29,025 lbf respectively), ensuring reliability and durability.
7017 CD/P4ADBD Bearing Typical Application Areas
The 7017 CD/P4ADBD is specified for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring the utmost in rotational accuracy.
- High-Frequency Machining Centers: For operations demanding high rigidity and damping characteristics.
- Industrial Pumps and Compressors: For shafts subjected to significant axial and radial forces.
