7217 ACD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7217 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
3.71 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
56 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
35100 lbf
Radial static load rating
38250 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7217 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7217 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and running accuracy. This back-to-back (DB) matched pair configuration is preloaded to Extra Light (Class A) standards, ensuring high system stiffness and minimal axial/radial runout. It is engineered to handle combined loads (radial and axial) simultaneously, making it an ideal solution for high-precision spindles and other critical machinery where positional accuracy and stability are paramount.
7217 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7/ISO P4), ensuring extremely tight dimensional and running accuracy. |
| DB | Signifies the bearings are supplied as a Duplex Back-to-Back matched set, optimized to handle moment loads and provide high rigidity. |
| A | Denotes the specific Extra Light preload applied to the matched set. |
7217 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing system rigidity and resistance to moment loads, which is critical for maintaining precision under operational stresses.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 35,100 lbf, this bearing is engineered to efficiently support substantial combined radial and axial loads.
- Precision & High-Speed Capability: The P4A tolerance class guarantees minimal runout and vibration. The lightweight phenolic cage and optimized internal geometry contribute to stable operation at high speeds, with a limiting speed of 17,000 rpm.
- Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The phenolic cage provides excellent strength and lubrication compatibility.
7217 ACD/P4ADBA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Other machinery requiring high rigidity, precision, and speed.
