STRUCTURE AND FEATURES - High quality die casting aluminum alloy housing, suitable for universal mounting. - Heat sink design for cooling provides great surface area and higher thermal capacity than the casting iron housings. - 8 sizes from 030 to 130, with power scope rom 7.5w to 60kw. - Larger speed ratio range. each single frame size has 12 ratios from 5:1 to 100:1. - Hardened worm with fine grinding has the features of higher efficiency and big output torque. - Low noise and stably running, can adapt long term work condition in terrible environments. - Light weight, high mechanical strength. - Modularization combination PCRW&DRW extend the ration of RW reducers from i =5:1 to 3200:1