Ovaal gat rolluik deur rolvormmasjien, dit is gewild in Noord-Amerika en Suid-Amerika.
Torrist structure, the forming roller has high machining accuracy, and the roller use material as Cr12 with high precision work ,heat treatment, uselife is longer
Special design of oval hole , 3 stations of punching, edging and flanging at the same time, accurate hole size (152 * 25MM), accurate punching position, no half hole, flanging does not hurt finger
spoorsny, spoed met gat 5m/min, spoed sonder gat 9m/min
Die lengte van die lat kan arbitrêr in plc gestel word (mits die totale lengte ooreenstem met die aantal gate)