FESTO DSNU-8-40-P-A ISO Cylinder | 8mm Bore, 40mm Stroke, Elastic Cushioning Specs

Meta Description:​ FESTO DSNU-8-40-P-A ISO cylinder specifications. 8mm bore, 40mm stroke, double-acting, elastic cushioning, M4 piston rod thread, M5 ports. Conforms to ISO 6432. For compact automation applications.

FESTO DSNU-8-40-P-A ISO Cylinder

The FESTO DSNU-8-40-P-A​ is a compact double-acting pneumatic cylinder​ from the DSNU series, featuring 8mm bore diameter​ and 40mm stroke. This ISO 6432 compliant cylinder is designed for industrial automation applications requiring reliable linear motion in tight spaces. With elastic cushioning at both ends, male thread piston rod, and compatibility with proximity sensors, it provides precise performance for light-duty applications in electronics assembly, small automation, and precision handling systems where compact size is critical.

Key Features

• ISO 6432 Compliance:​ Standardized dimensions and mounting for easy integration

• Double-Acting Operation:​ Provides force in both extension and retraction directions

• Elastic Cushioning:​ Elastic cushioning rings/plates at both ends for end-position damping

• Compact Design:​ Small footprint for space-constrained applications

• Male Thread Piston Rod:​ M4 external thread for accessory mounting

• Position Sensing Compatible:​ Supports proximity sensor installation (requires magnetic piston)

• Wide Operating Pressure:​ 1.5 to 10 bar operating range

• Standard Mounting:​ Multiple mounting options with accessories

• Lightweight Construction:​ Optimized for small automation applications

Technical Specifications

Note: Specifications are based on FESTO DSNU series technical documentation and industry standards. The exact configuration for this specific model number includes 8mm bore, 40mm stroke, elastic cushioning, and male thread piston rod.

Model Number Decoding (DSNU-8-40-P-A)

• DSNU:​ Series designation (ISO cylinder, double-acting)

• 8:​ Bore diameter (8 mm)

• 40:​ Stroke length (40 mm)

• P:​ Cushioning type (P = elastic cushioning rings/plates at both ends)

• A:​ Position sensing capability (A = compatible with proximity sensors)

Note:​ The "P" designation indicates elastic cushioning with non-adjustable end-position damping. The "A" specifies position sensing compatibility (requires magnetic piston for sensor operation).

Key Differences from Similar Models

Compared to other DSNU series cylinders:

• DSNU-8-40-P-A:​ 8mm bore, 40mm stroke, elastic cushioning, position sensing (this model)

• DSNU-12-40-P-A:​ 12mm bore with same stroke (higher force output)

• DSNU-8-25-P-A:​ Same bore but 25mm stroke (shorter travel)

• DSNU-8-60-P-A:​ Same bore but 60mm stroke (longer travel)

• DSNU-8-40-PPVA-N3:​ Different cushioning and sensing configuration

The 8mm bore​ provides compact size with light force output, while the 40mm stroke​ offers moderate travel distance for applications requiring linear movement in limited space.

Typical Applications

• Electronics Assembly:​ Component positioning and insertion in PCB assembly

• Small Automation:​ Compact linear motion in laboratory equipment

• Precision Handling:​ Small part handling and positioning

• Medical Devices:​ Linear actuation in diagnostic equipment

• Testing Equipment:​ Small-scale test fixtures and positioning

• Packaging Machinery:​ Compact product handling operations

• General Automation:​ Light-duty linear motion applications

Important Selection & Installation Notes

1. Bore Size Consideration:​ The 8mm bore provides approximately 30N force at 6 bar. Ensure this meets your application's force requirements. For higher force, select larger bore sizes (12mm, 16mm, etc.).

2. Stroke Consideration:​ The 40mm stroke provides moderate travel distance. Ensure this meets your application's movement requirements. For shorter strokes, select 25mm models; for longer strokes, consider 60mm or longer.

3. Cushioning Performance:​ Elastic cushioning provides non-adjustable end-position damping. For applications with high speeds, ensure the cushioning is adequate for your application.

4. Operating Pressure:​ Do not exceed 10 bar maximum operating pressure. For optimal performance, operate between 4-6 bar.

5. Air Quality:​ Use filtered, lubricated or non-lubricated compressed air according to ISO 8573-1:2010 [7:4:4]. If using lubricated air, maintain consistent lubrication.

6. Mounting:​ Ensure proper alignment during installation to avoid side loads, which can reduce seal life and cause premature failure.

7. Position Sensing:​ This model is compatible with proximity sensors for position detection. Ensure the piston has a magnetic ring (standard on most DSNU models) if position sensing is required.

8. Force Requirements:​ With 30N maximum force at 6 bar, this cylinder is suitable for light-duty applications. Verify load requirements and safety factors.

9. Temperature Range:​ Do not operate outside -20°C to +80°C range.

10. Maintenance:​ Regular inspection of seals is recommended. Check for air leaks and proper operation periodically.

11. Space Constraints:​ The compact size makes this model suitable for applications with limited installation space.

12. Air Consumption:​ Small bore cylinders consume less air. Ensure your compressed air system can supply sufficient flow rate.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO DSNU Series Technical Manual​ or contact FESTO technical support. Always verify the exact model number configuration with the manufacturer, as notation variations may occur in different documentation systems.