Centerline Radius (CLR): Is the measurement of the tube or pipe radius that you will be mandrel or rotary draw bending. This is the distance in mm or inches from the center of tube or pipe curvature to the centerline axis of the pipe or tubing that you will be mandrel bending, or rotary draw bending.
Step 1: If there is a bended sample tube or pipe available, place the tube or pipe that you want to bend on a large piece of paper on the floor.
Step 2: Tracing the sample tube or pipe that you would like to mandrel bend onto the paper, continuing the pattern until you have made a full circle with the tube or pipe that you are working with.
Step 3: Measure (in mm or inches) from the center of the tube or pipe to the center of your drawn circle.
●Easy Way (EW): This is bending the workpiece on its short side during the mandrel bending process; bending of a rectangular tube or pipe.
●Hard Way (HW): This is bending the workpiece on its long side during the mandrel bending process; bending of a rectangular tube or pipe.