For bends, the minimal distance between the inside edge of the bend and the skin of the hem should be 5 times material thickness plus bend radius plus hem radius. Machined and formed countersinks are attainable after lasercutting. Machined counter sinks are created with a drill press whereas formed counter sinks are created with punch press tooling. Countersink depths ought to me no more than|not more than} 0,6mm the material thickness. Minimum bend radii necessities can vary depending on applications best hand massagers for arthritis and material. For aerospace and area applications, the values may be be} greater.