S71917 ACD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71917 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
1.08 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16088 lbf
Radial static load rating
20588 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
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
In Stock
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Product Overview and Core Advantages
The S71917 ACD/P4ADGA is a precision double-row angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered to simultaneously handle combined radial and axial loads from both directions, its compact design offers a high-performance solution in a minimal footprint. This bearing features an extra light preload (Class A) and a P4A super-precision tolerance class, making it ideally suited for high-speed spindles and other precision machinery where rotational accuracy and system rigidity are paramount.
S71917 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact Angle of 25° and a Phenolic Resin Cage. |
| P4A | Indicates a super-precision tolerance class for both bore and outside diameter, exceeding normal P4 levels for superior running accuracy. |
| DGA | Specifies the universal matchable (SU) arrangement and the grease lubrication used. |
Structural Features and Performance Benefits
- High Rigidity and Load Capacity: The double-row design provides superior radial and axial stiffness, enabling the bearing to effectively support combined loads and moments. The optimized 25° contact angle ensures excellent bidirectional axial load capacity.
- High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 28,000 rpm. This makes it an ideal high-speed bearing for demanding applications.
- Precision and Longevity: Manufactured to P4A tolerance class with tight dimensional controls, it guarantees exceptional running accuracy and low vibration. The bearing comes sealed and pre-lubricated with grease, offering a long service life and reduced maintenance requirements.
- Universal Matchability: Designated as Universal Matchable (SU), these bearings can be paired in any combination to create precisely preloaded sets, simplifying inventory and assembly for complex spindle configurations.
S71917 ACD/P4ADGA Bearing Typical Application Areas
This precision double-row angular contact ball bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motors and main spindles.
- Industrial Pumps and Compressors: Where reliability and speed are critical.
- Robotics and Automation: Precision rotary joints and arm linkages.
