Korea's leading manufacturer of speed reducers aspires to become "the best option" for global customers Established in 1975 HDM(Hapdong Manufacturing Co.) is Korea's leading manufacturer of speed reducers.

After initially producing PLV gearboxes, HDM began to develop cycloidal gear reducers in the late 1980s when most of the Korean customers were forced to use overpriced imported products When HDM successfully developed a cycloidal gear reducer. 

Korean customers had a new option. Since then, HDM has been leading the Korean market by developing technologies to improve quality and building mass-production lines to ensure reasonable prices HDM led the Korean speed reducer market once again by introducing the European style geared motor "G-Drive" while all other domestic players were remaining to produce old-fashioned geared motor developed several decades ago.

Based on HDM craftsmanship, which never compromises on quality HDM gained the trust of many customers,
and as a result. thousands of domestic and overseas customers have chosen HDM reducers in the past ten years.

By offering high-quality products at reasonable prices, HDM aspires to become "the best option" for customers.