Pneumatic Swivelling Units Series RT - Overview

The RT series pneumatic swivelling units utilize a rack and pinion mechanism with continuously adjustable stroke. They feature large ball bearings on the shaft and a through hole in the pinion. Optional accessories include rubber bumpers (FGD), hydraulic shock absorbers, intermediate stoppers (RTD), and proximity magnetic sensors.

Technical Specifications

• Medium: Compressed air compliant with ISO 8573-1:2010 [7:4:4]
• Pressure Range: 1.5 to 8 bar
• Temperature Range: 5°C to 60°C
• Maximum Swivelling Angle: 190°
• Theoretical Torque at 6 bar: Ranges from 28 Ncm (RT-10) up to 3926 Ncm (RT-63)
• Maximum Working Frequency: 1 Hz to 3 Hz depending on model
• Swivelling Time Without Load: Between 0.05 s and 0.23 s
• Cycle Air Consumption: From 3.3 cm³ to 520 cm³
• Maximum Repeatability Tolerance with Shock Absorber: 0.02°
• Weight: From 235 g (RT-10) to 8185 g (RT-63)

End Stroke Accessories and Stroke Adjustment

Stroke adjustment is critical and must be done using hydraulic shock absorbers, rubber bumpers (FGD), or grub screws depending on the kinetic energy the unit must withstand. Usage without stroke adjusters is strictly prohibited.

The document provides a table listing compatible shock absorbers and bumpers for each RT model, including their dimensions and codes. The pinion radius (R), minimum length of end-stroke device to reduce stroke to 90° (X_90°), and rack stroke per degree of pinion rotation (X_1°) are key parameters for calculating stroke adjustments.

Example: For a 70° rotation on RT-63, the required end-stroke device length X = 60 + (20 × 0.3571) = 67.1 mm.

Dimensions and Mounting Details

The document provides detailed dimensional data for each RT model, including:

• Overall dimensions (A, B, C, D, etc.) in millimeters
• Diameter and tolerance of through holes and fastening holes (D1, D2, D3, etc.)
• Thread sizes for air connection and fastening (K, V, M sizes)
• Sensor groove locations for SS and SN series sensors
• Positions for stroke adjusters and dowel pins

This detailed dimensional information supports precise installation and integration into automation systems.

Key Recommendations and Limitations

• Always use stroke adjusters (shock absorbers or bumpers) to protect the unit and ensure repeatability.
• Check compatibility of shock absorbers based on load conditions (heavy or light).
• Adjust stroke carefully according to the required rotation angle using the provided formulas and accessory dimensions.
• Ensure compressed air quality complies with ISO 8573-1:2010 [7:4:4] to maintain unit performance and longevity.
• Observe maximum pressure and temperature limits to avoid damage.

Summary

The RT series pneumatic swivelling units are robust, precise rotary actuators suitable for industrial automation requiring adjustable stroke and high repeatability. Their modular design with optional accessories allows customization for various load and application requirements. Detailed technical and dimensional data facilitate proper selection, installation, and maintenance.