공작물을 추진기구로 향해서 컨베이어로 반송하여 맞닿게하여 제1컨베이어라인측 바이스로 공작물을 고정시키며 공작물 선단측을 절단하여 일정치수로 한다. 추진기구에 의하여 공작물을 컨베이어 반송력에 저항하여 전진시키고, 제1컨베이어라인측 바이스로 고정시켜서 가공하여, 일련의 동작을 반복한다. 최후에 공작물을 제2컨베이어라인측까지 전진시켜, 제2컨베이어라인측 바이스로 고정시키고, 추진기구를 후퇴시켜서 최종가공을실시한다.공작물 선단측의 일정치수로 자르는 대신에 공작물 선단을 스토퍼와 맞닿게하여, 공작물 선단을 기준으로 반송을 실시해도 좋다.
A work is conveyed by a conveyor toward a propulsion mechanism to abut thereagainst, gripped by a vice on a side of a first conveyor line and is cut at its tip end side portion into a regular-size. The propulsion mechanism advances the work against a carrying force of the conveyor to permit the vice on the side of the first conveyor line to grip the work for processing, and a series of the actions are repeated. Finally, the work is caused to advance to a side of a second conveyor line so that it is gripped by a vice on the side of the second conveyor line and the propulsion mechanism is retracted for a final processing. Instead of cutting the tip end side portion of the work for regular sizing, the tip end of the work may be made to abut against a stopper and feeding is made with a work tip end thereof as a reference.