7217 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7217 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
1.86 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
22388 lbf
Radial static load rating
19800 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 240.51
/ each
In Stock
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7217 CDGA/P4A Bearing Product Overview & Core Advantages
The 7217 CDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to an ultra-precision P4A tolerance class, this bearing excels in handling combined radial and axial loads simultaneously. Its extra light preload (Class A) minimizes deflection under operational stresses, ensuring superior running accuracy and positioning control. The phenolic cage and universal matchable (SU) designation make it ideal for high-speed spindles and other high-performance machinery where reliability and precision are paramount.
7217 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed operation and moderate axial load capacity. |
| DG | Universal Matchable (SU) | Bearings are manufactured to universal specifications, allowing for flexible mounting arrangements (e.g., back-to-back, face-to-face) in sets to increase system rigidity. |
| A | Extra Light Preload (Class A) | Provides minimal internal clearance for maximum stiffness and rotational accuracy, reducing vibration and noise in high-precision applications. |
| P4A | Ultra-Precision Tolerance Class | Exceeds standard ABEC 7/ISO P4 tolerances, ensuring extremely tight dimensional and running accuracy for the most demanding spindle applications. |
7217 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The combination of the 15° contact angle and extra light preload provides exceptional system stiffness, critical for maintaining precision under cutting forces and high-speed operation.
- Superior Load Capacity: With a dynamic load rating of 22,388 lbf and a static load rating of 19,800 lbf, this bearing reliably handles significant combined loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 17,000 rpm.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be paired with other identical bearings in pre-determined sets (up to 4 in this case) to create a rigid, pre-loaded bearing system without the need for selective mounting.
7217 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring ultimate precision and rigidity.
- Precision Instrumentation: High-accuracy measuring devices and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Applications where minimal runout and vibration are critical.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other high-reliability rotational mechanisms.
