Advantages • Economical cost • Low noise level • Smooth operation • High allowable radial loa Available Reducer Configurations • Foot-mounted or flange-mounted • B5 or B14 flange mounting • Solid or hollow output shaft • Hollow shaft options: single keyway, shrink disc, splined bore, TorqLOC® hollow shaft SEW S Series Helical-Worm Reducers Two-stage helical-worm design with solid or hollow output shaft, available for foot, flange or torque arm installation. Max transmission efficiency reaches 93%, featuring compact dimension, light weight, low noise and smooth running. Frame Sizes: S37, S47, S57, S67, S77, S87, S97 SA37, SA47, SA57, SA67, SA77, SA87, SA97 SF37, SF47, SF57, SF67, SF77, SF87, SF97 SAF37, SAF47, SAF57, SAF67, SAF77, SAF87, SAF97 SAT37, SAT47, SAT57, SAT67, SAT77, SAT87, SAT97 Self-locking Feature One prominent merit is inherent self-locking performance. It prevents reverse rotation of the load when no active driving force is applied, securing workpiece position without extra brakes or locking parts. Efficiency Despite relatively lower mechanical efficiency compared with other gearbox types, modern optimized design and advanced materials have improved their efficiency to a satisfactory level. Low-Noise Operation Worm drives run smoothly and quietly, well-suited for noise-sensitive working scenarios. Wide Versatility They are extensively adopted across numerous industries including machinery manufacturing, automotive, robotics and material handling.