... copper,stainless steel,aluminum,steel, etc. This machine is NC control, for punching & drawing tapered holes on round tubes,copper,stainless ... pipe purpose. It is servo motor feeding, high precision, quick speed. It is hydraulic punching & drawing tapered bores, one time ... hole distance: 15mm 5) Max. workpiece length: 1500mm 6) Working speed: 4 seconds per hole 7) Hole position tolerance: less than ...