T-SHAPED BUSHING AND A CNC(COMPUTER NUMERICAL CONTROL) DRILL DEVICE, FOR SUPPRESSING THE INCREASE OF MATERIAL COST ACCORDING TO THE EXCHANGE OF A BUSHING BY APPLYING A METAL MATERIAL OF STRONG DURABILITY TO A BUSHING

摘要

PURPOSE: A T-shaped bushing and a CNC(Computer Numerical Control) drill device are provided to prevent an aluminum foil from rising by dust collection pressure because the side inflow air is more than the lower inflow air.;CONSTITUTION: A T-shaped bushing is composed of a cylindrical body(1), a protruded portion(2), and a through-hole(3). The cylindrical body has the radius of the fixed length. The protruded portion is kept by the cylindrical body and a concentric shaft. The protruded portion is formed on the bottom. The through-hole is formed over the whole axial length of the cylindrical body and the protruded portion.;COPYRIGHT KIPO 2010