7217 CD/P4ADGA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7217 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7217 CD/P4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers superior performance in handling combined loads (simultaneous radial and axial loads). Manufactured to P4A tolerance class, it offers extremely tight dimensional and running accuracy. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-speed and high-rigidity spindle arrangements.
7217 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7217 | Basic bearing series, indicating bore diameter (85 mm), outside diameter (150 mm), and width (56 mm) |
| CD | Universal matchable bearing pair with a 15° contact angle, optimized for high rigidity when mounted together |
| P4A | High precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration |
| DGA | Indicates the bearing is lubricated and supplied as a matched set (2 bearings) |
7217 CD/P4ADGA Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Universal Matching: The 15° contact angle and universal matchable (SU) design enable the bearing pair to handle significant axial loads from both directions while maintaining high running accuracy. This configuration provides exceptional system rigidity and minimizes axial displacement.
Premium Material Construction: Manufactured from chrome steel rings and balls with a phenolic cage, this bearing offers excellent durability and dimensional stability. The phenolic cage contributes to lower friction and higher limiting speeds (17,000 rpm) while being suitable for the specified temperature range (-30°C to 110°C).
Precision Engineering: The P4A tolerance class ensures tight dimensional control (bore/OD tolerance: -0.004mm to 0) and superior running precision. Combined with the extra light preload, this results in smooth operation with minimal vibration, critical for high-speed applications.
High Load Capacity: With a dynamic load rating of 36,675 lbf and static load rating of 39,600 lbf, this bearing delivers reliable performance under demanding combined load conditions.
7217 CD/P4ADGA Bearing Typical Application Areas
The 7217 CD/P4ADGA is specifically engineered for precision machinery requiring high-speed operation and exceptional accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial transmissions requiring minimal backlash
- High-Speed Motors: Spindle motors and high-frequency applications
- Aerospace Components: Guidance systems and auxiliary power units
- Medical Equipment: Dental handpieces and surgical tool drives
