The STL / STL-F Series safety coupling from SUNG-IL MACHINERY is a high-performance torque limiter designed to provide both reliable power transmission and effective overload protection. By combining the functions of a precision coupling and a mechanical torque limiter, the STL Series helps protect valuable machinery from unexpected torque overloads, reducing downtime and minimizing maintenance costs.
Available in Coupling Attached Type (STL) and Flange Type (STL-F) configurations, the series is suitable for a wide range of industrial automation, motion control, and power transmission applications.
Product Features
Wide Range of Preset Torque Values
The STL / STL-F Series offers a broad selection of standard preset torque values, allowing engineers to choose the ideal overload protection level for various industrial machines and drive systems.
Automatic Overload Protection
When transmitted torque exceeds the preset value, the safety coupling automatically disengages through its ball-and-pocket mechanism. This instantly interrupts power transmission, protecting motors, gearboxes, shafts, and other critical components from damage. Once the overload condition is removed, the coupling can be reset for continued operation.
Misalignment Compensation (STL Series)
The STL Series (Disk Coupling Attached Type) incorporates flexible plate springs that compensate for angular, parallel, and axial shaft misalignment while maintaining high torsional rigidity and precise torque transmission.
Easy Torque Adjustment
Torque settings can be adjusted quickly using the integrated adjusting nut and spring pressure indicator. This allows simple and accurate torque calibration without complex procedures, making machine setup and maintenance faster and more efficient.
Flexible Assembly Options
The STL / STL-F Series provide multiple mounting and clamping configurations to suit different machine designs and installation requirements.
- Coupling Attached Type (STL) for shaft-to-shaft connections
- Flange Type (STL-F) for timing pulleys, sprockets, gears, and other rotating components
- General set-screw type
- P. Lock type
- Optional keyway configurations
Operating Principle
The STL / STL-F Safety Coupling operates using a precision ball-and-pocket disengagement mechanism. Under normal operating conditions, torque is transmitted smoothly through the coupling. If torque exceeds the preset disengagement value, the steel balls move out of their V-shaped pockets, causing the coupling to enter an idle state and mechanically disconnect the drive system. This rapid response protects machinery from overload damage while reducing costly downtime.
Additional Sensor Integration
For enhanced machine safety and automation, the STL / STL-F Series can be equipped with an optional proximity sensor or limit switch. These sensors detect the disengagement position of the ball guide, allowing automatic motor shutdown or system alarms immediately after overload occurs.
If you are looking for safety coupling, you can find them at SUNG-IL MACHINERY.
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