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SUNG-IL MACHINERY is a leading manufacturer of high-precision power transmission components, offering advanced safety coupling solutions for industrial automation and motion control systems. Designed to protect machinery from excessive torque and sudden overload conditions, SUNG-IL safety couplings provide reliable performance, precise torque transmission, and enhanced equipment protection across various industrial applications. What is a Safety Coupling? A safety coupling is engineered to transmit rotational motion under normal operating conditions while automatically disengaging when torque exceeds the preset limit. This mechanical protection system minimizes damage to motors, gearboxes, conveyors, servo systems, and precision automation equipment. STL Series – Safety Coupling for Torque Overload Protection (Coupling Attached Type) The STL Series safety coupling is a coupling-attached type safety coupling designed for shaft-to-shaft connections while providing precise overload protection and misalignment compensation. STL Series Features - Integrated Coupling and Torque Limiter The STL Series combines power transmission and overload protection into a single compact unit, reducing installation complexity and improving machine reliability. - Torque Overload Protection When torque exceeds the preset limit, the internal ball mechanism disengages to mechanically cut off motion and protect connected equipment from damage. - Misalignment Compensation The coupling-attached structure absorbs angular and parallel misalignment using plate spring technology, improving machine stability and reducing vibration. - Wide Torque Adjustment Range Different spring combinations and adjusting nut settings allow flexible torque configuration for various industrial applications. - Easy Torque Adjustment The STL Series features an adjusting nut and spring pressure indicator that simplify torque setting and maintenance. - Automatic Overload Detection Optional limit switches and proximity sensors can be installed to detect overload conditions and automatically stop connected machinery. STL-F Series – Safety Coupling for Torque Overload Protection (Flange Type) The STL-F Series safety coupling is a flange-type overload protection solution designed for mounting with timing pulleys, sprockets, gears, and various rotating components. STL-F Series Features - Flange-Type Design The STL-F Series allows direct mounting to timing pulleys, sprockets, and other drive components for flexible system integration. - Reliable Overload Protection The precision ball-detent mechanism disconnects motion instantly during overload conditions to protect machinery and prevent system failure. - Compact and Durable Structure The compact flange-type design supports high durability and stable performance in demanding industrial environments. - Wide Range of Torque Settings The STL-F Series provides multiple torque setting options through spring combinations and adjustable pressure control. - Precise Motion Transmission Designed for high-precision industrial systems, the STL-F Series maintains stable rotational performance and reliable torque transfer. - Easy Maintenance and Installation The modular flange structure simplifies installation, replacement, and maintenance operations.