OTC DAIHEN – the world’s No. 1 manufacturer of arc welding robots – is helping manufacturers find new ways to automate welding to boost productivity, overcome challenges and gain more consistent, high-quality welds. Be an industry leader with an OTC DAIHEN solution on your production floor.

historical picture of OTC DAIHEN team member
OTC DAIHEN trade show booth



OTC DAIHEN is the world’s No. 1 manufacturer of arc welding robots. At OTC DAIHEN USA, we are a true single-source solution provider of both robotic and manual welding solutions. We design, build and install the entire welding solution, train your team on how to program and operate it and provide the service and parts to keep it up and running. Be No. 1 with an OTC DAIHEN solution on your production floor.


OTC DAIHEN has been in business for more than 100 years, beginning as the Osaka Transformer Company (OTC) in Osaka, Japan, in 1919. We’ve seen it all when it comes to welding and robots. 

In the late 1970s, OTC DAIHEN developed its first generation of dedicated arc welding robots. The first of these robots, THOR, was launched in 1981. 

OTC DAIHEN USA, with its first office set up in 1979 in Charlotte, N.C., entered the robotic business in 1983 and continued to refine automation welding with its ALMEGA line of robots.

In 1985, OTC DAIHEN USA became the official OEM supplier of robots to Miller Electric Co. In 1995, Miller announced its departure from the robotics business. In order to maintain the high volume of robots installed, as well as to continue selling to new users, OTC DAIHEN launched its Dynamic Robotic Division and moved its U.S. headquarters to Ohio.

The first robots sold in the United States with the OTC DAIHEN name utilized the Dynamic Robotics (DR) Controller. This was followed by the release of the EX series in 2001, the AX series in 2003, the AII series in 2008 and the FD series in 2012.

As we continue to grow, we are dedicated to serving customers by advancing our company mission: Meeting the Challenge. Bring us your toughest challenges, and we won’t rest until we deliver an ideal solution.


nOTC (Osaka Transformer Company) founded in Osaka, Japan


OTC begins producing welding power sources


OTC America established in Charlotte, NC


Dynamic Robotic Division established in Ohio


Regional service centers established in Atlanta, Michigan, Canada and Mexico

OTC DAIHEN team members at a trade show


In 1985, the parent company name was changed to DAIHEN Corporation, and at the same time, the company established the corporate philosophy of “reliability and creativity.” DAIHEN Corp. and OTC DAIHEN USA both follow this philosophy, which is a commitment to high quality, customer satisfaction and meeting the demands of today and tomorrow by developing new technologies.

DAIHEN Corp. today includes 30+ companies worldwide.

OTC DAIHEN USA on the Road

Trade Show Appearances

Visit OTC DAIHEN USA at key industry trade shows to see our robotic welders in action, learn about our innovative products and find out how to get an OTC DAIHEN solution for your business.