is the leading us manufacturer of heavy-duty metal spin-forming machines, utilizing the latest technology, including playback/cnc and cnc control. mjc specialize in the design of custom machines including applications for spinning, shear forming, flow forming, necking in & closing, profile forming, machining, turning, cutting, beading, flanging and custom metal forming. mjc also specialize in used or retrofitted machines. mjc engineering & technology inc. supplies a complete line of circle shears, beading / forming machines.