7217 ACD/HCP4AQGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7217 ACD/HCP4AQGA
Basic Information
System of measurement
Metric
Weight
6.27 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
112 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
56475 lbf
Radial static load rating
76500 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7217 ACD/HCP4AQGA Bearing Product Overview & Core Advantages
The 7217 ACD/HCP4AQGA is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable bearing is supplied in a set of four, pre-configured for optimal performance in complex arrangements. Its design excels at simultaneously handling combined radial and axial loads, making it ideal for high-speed, high-rigidity systems. The use of ceramic balls and a phenolic cage contributes to superior performance under extreme conditions.
7217 ACD/HCP4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| HC | Hybrid Ceramic, indicating the balls are made from ceramic material. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7/ISO P4). |
| QGA | Signifies an Extra Light (Class A) preload and that the bearing is universally matchable (SU) in a set of 4. |
7217 ACD/HCP4AQGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides exceptional rigidity, enabling stable support for combined loads (radial and bidirectional axial). The 25° contact angle is optimized for significant axial load carrying capacity.
- Superior High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, allowing for a high limiting speed of 17,000 rpm. This combination minimizes friction and heat generation.
- Enhanced Durability & Precision: The P4A tolerance class ensures extremely tight dimensional control for superior running accuracy. The hybrid ceramic construction offers increased durability, lower thermal expansion, and extended service life compared to all-steel designs.
- Optimized for Matched Sets: As a universal matchable (SU) bearing supplied in a set of 4, it allows for flexible mounting arrangements (e.g., back-to-back, face-to-face, or tandem) to achieve the desired stiffness and load distribution in the application.
7217 ACD/HCP4AQGA Bearing Typical Application Areas
This bearing is designed for high-performance machinery where precision, speed, and reliability are critical. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme accuracy and minimal runout are required.
- High-Frequency Motors and Spindles: Applications demanding low vibration and high rotational speeds.
- Aerospace & Defense Systems: Including gyroscopes, radar systems, and other precision instruments.
