Profile: Ningbo Donly Import & Export Co., Ltd. is engaged in the research, development, design, and production of various transmission products. We are an ISO 9001 certified company. We manufacture industrial gear units, gear motors, electromotors, various bearings, wheel hub bearings, couplings, gears, pinions and racks. We offer various types of motors such as YP series AC motors driven by inverters, YG series for roller table, YZ series for metallurgy & cranes and Y series industrial three phase AC induction motors. Our YP series motor with inverter device can realize stepless speed regulation and can reach energy saving & automatic control. It features excellent frequency modulation, energy saving, excellent starting torque, low noise, small vibration, stable operation and aesthetic appearance. Power range and mounting dimension comply with IEC standard. They offer a rated voltage of 380 V with 50 Hz frequency under the constant-power speed regulation from 50-100 Hz. These motors are applied in transmission devices of speed regulation such as steel rolling, crane, transportation, printing & dyeing, paper-making, chemical, textile and medicine. With high precision sensor, it can realize close-loop operation. Our planetary gear units are reliable drive component for use in different industrial sectors. The modular design permits standardization of many basic components, including planetary gear stages and housing parts as well as input & output side components. Our crown-tooth gear coupling has the advantage of compact, small moment of inertia, reliable work, carrying capacity and a small amount of compensation performance. These are widely used in metallurgy, mining, building materials, chemicals, petroleum, transport, textile and other industries. We are fully equipped with advanced equipments and inspection instruments. We also export our products to various countries worldwide.