S71917 ACD/P4ADGC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71917 ACD/P4ADGC
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
Moderate / Class C
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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S71917 ACD/P4ADGC Bearing Product Overview & Core Advantages
The S71917 ACD/P4ADGC is a precision double-row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered to simultaneously handle combined radial and bidirectional axial loads, this bearing features a 25° contact angle and P4A super-precision tolerance for superior rotational accuracy. Its compact double-row design provides high rigidity and stable performance in high-speed operations up to 28,000 rpm. Pre-lubricated with grease and sealed for protection, it offers long-term, maintenance-free operation in critical machinery.
S71917 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | Double-Row Angular Contact Design, 25° Contact Angle | Optimized for combined load capacity and high rigidity |
| P4A | Super-Precision Tolerance Class (ABEC 7/ISO P4) | Ensures exceptional running accuracy for precision applications |
| DGC | Universal Matchable (SU) Paired Set, Moderate Preload (Class C) | Enables simplified mounting and optimized stiffness in matched bearing arrangements |
S71917 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double-row angular contact configuration with a 25° contact angle provides superior resistance to combined loads, delivering high radial and bidirectional axial stiffness for stable shaft support.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-speed precision applications.
- Optimized High-Speed Operation: The phenolic cage reduces centrifugal forces and friction, supporting a limiting speed of 28,000 rpm. Combined with grease lubrication, it maintains reliable performance at high velocities.
- Sealed & Pre-Lubricated Design: Integrated seals protect against contamination, while factory-applied grease ensures consistent lubrication across the operating temperature range (-30°C to 110°C), enabling long service life with minimal maintenance.
S71917 ACD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring high rigidity and accuracy.
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and other equipment demanding high-speed capability.
- Precision Instrumentation: Medical devices, optical scanners, and measuring equipment where super-precision and low vibration are critical.
- Industrial Pumps & Compressors: Applications handling combined loads in harsh environments, benefiting from the sealed, maintenance-free design.
