Linear Friction Welders Explore MTI’s most popular Linear friction welders for industry. Select a machine below for detailed information and specifications. Microwelder Low Force Friction Welder & Linear Friction Welder View Machine LF35-35 Low Force Friction Welder & Linear Friction Welder View Machine LF35-75 Linear Friction Welder View Machine LF75-75 Linear Friction Welder View Machine Our Commitment Quality is at the core of our ingenuity MTI brings the highest possible degree of safety and quality, whether it’s a part we’re welding or a machine we’re building. We are equipped to produce parts for the most sensitive environments and exacting standards.