JDY-3T CAM ROLLING MACHINE JDY-310 HYDRAULIC THRU FEED ROLLING MACHINE JDY-30A THREE DIE THREAD AND FORM ROLLING MACHINE JDY-60A THREE DIE THREAD AND FORM ROLLING MACHINE JDY-30 HYDRAULIC THRU FEED ROLLING MACHINE JDY-50 HYDRAULIC THRU FEED ROLLING MACHINE JDY-70 THREAD ROLLONG MACHINES