Peiriant ffurfio rholio drws caead rholio twll hirgrwn, mae'n boblogaidd yng Ngogledd America a De America.
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
toriad olrhain, cyflymder gyda thwll 5m / min, cyflymder heb dwll 9m / min
Gellir gosod hyd yr estyll yn fympwyol yn ccc (ar yr amod bod y cyfanswm hyd yn cyfateb i nifer y tyllau)