Double punching sleeve, as well as the system is made of a tube and a double bush punching

摘要

Double punching sleeve (10) for forming a channel by means of a pipe, wherein the channel in the substantially perpendicular to the tube axis, wherein the double punching sleeve (10) a substantially cylindrical hollow body (15) with two on opposite axial ends of the hollow body (15) arranged punched portions (20, 20 '') to pierce of two opposite walls of the tube, with the punching sections (20, 20'') in each case one opening (30, 30 ''), and with a central portion (22), which is disposed between the two punched portions (20, 20'') is arranged and contact surfaces (40, 40 '') for abutment on the inside of the pipe.– the two punching sections (20, 20 '') and the central portion (22) in each case have a cylindrical outer circumference, and– the central portion (22) a larger outside diameter than the punching sections (20, 20 ''), so that adjacent to the punched portions (20, 20'') the contact surfaces (40, 40 '') are formed.