The Model MF3i is driven with a pneumatic or electrical motor. The air supply of the pneumatic drive is done with a safety-turning valve, to operate the motor. By throttling the air supply, the motor speed can be controlled. The electric drive is designed for a connection voltage of 230V/120V.
A hand wheel can adjust the desired speed continously. The MF3i is fixed in the pipe through self-centering sleeves with exchangeable clamping jaws that act on the ID. The sleeve is operated with a star wheel or a ratchet on the back of the machine. The feed of the milling spindle works manually. The two existing possibilities are either a star handle or a ratchet on the back of the machine.
Several tools that can be used are HSS tool bits or inserts with insert holder, which are clamped in a tool holder adapted to the processing diameter. To cover the whole clamping area with a pipe ID from 0,984-5,984" internal pipe diameter two clamping sleeves are available, which can be both combined with different clamping jaws. Depending on the feed device the clapms have different lengths, but are used with the same clamping jaw. Each complete sleeve consists of a sleeve, a front tension rod and a rear tension rod.