71817 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71817 ACD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.53 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
30
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7470 lbf
Radial static load rating
10800 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
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:
$ 555.21
/ each
In Stock
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71817 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71817 ACD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Manufactured to P4 tolerance class, this bearing excels in high-speed operations with a limiting speed of 28,000 rpm. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, making it ideal for spindle assemblies and other high-precision machinery where combined loads are present. The bearing comes pre-lubricated and features an open design for controlled lubrication management.
71817 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high-speed performance and axial load capacity. |
| P4 | Indicates a high-precision tolerance class, ensuring minimal runout and superior dimensional accuracy for demanding applications. |
| DGA | Universal Matchable (SU) arrangement in a duplex pair. This suffix denotes that the bearing is supplied as one of a universally matchable set of two bearings, allowing for flexible mounting to achieve different preload levels (in this case, Extra Light / Class A). |
71817 ACD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle enables the bearing to support significant combined radial and axial loads simultaneously. The universal matchable pairing further enhances system rigidity.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to the high limiting speed of 28,000 rpm. This makes it a true high-speed bearing.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on the bore diameter (85 mm), outside diameter (110 mm), and width (26 mm), ensuring predictable performance and ease of integration into precision assemblies.
- Optimized Internal Geometry: The design utilizes 30 high-grade chrome steel balls of 7.144 mm diameter, balancing load distribution and rotational smoothness.
71817 ACD/P4DGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Control Systems
