7217 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7217 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7217 CD/P4ADBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Moderate / Class C standards, ensuring optimal stiffness and minimal axial/radial runout under operating conditions. Its primary advantage lies in its ability to handle combined loads—significant radial and bidirectional axial loads—simultaneously, making it ideal for high-precision, high-rigidity spindles and machinery. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy and consistent performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7217 | Basic bearing designation: 85 mm bore, 150 mm OD, 56 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 (matched) pair. |
| P4A | Specifies the tolerance class, denoting very high precision for bore, outer diameter, and width dimensions. |
| DB | Specifies the Back-to-Back arrangement of the matched pair, which provides high moment rigidity and stable preload. |
| C (in Preload) | Denotes a Moderate preload level, balancing rigidity and operational smoothness. |
7217 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning and enhanced system rigidity.
Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to support substantial combined radial and axial loads in both directions, a critical feature for complex loading scenarios.
Optimized High-Speed Performance: The lightweight, durable phenolic resin cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 17,000 rpm. The standard lubrication ensures reliable operation across the specified speed and temperature range.
Precision Engineering: Manufactured from high-grade chrome steel for rings and balls, and held to P4A precision tolerances, this bearing delivers exceptional running accuracy, low vibration, and long service life in demanding applications.
7217 CD/P4ADBC Bearing Typical Application Areas
The 7217 CD/P4ADBC is engineered for high-performance machinery where precision and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial gearboxes requiring high axial and radial stiffness.
- High-Frequency Motors & Spindles: Applications demanding minimal runout at high rotational speeds.
- Industrial Pumps & Compressors: For shafts subjected to significant combined loads.
