This invention discloses an easy-to-replace machine vertically kiln stepped gear and its fixing method for producing cement especially for ventilation and discharging which is to turn the existing body with grate to a grip stand, a post, a stepped gear and screw rod orderly from up to down, the post is normally regular prism, the said stepped gear seat is matched to the gear hole in shape and size, normally rectangular or regular triangle to be put into the hole to be filled up with pad and fastened with nuts, which is suitable for any shape of grates. |