1.bolts making machine 2.one perason operating 3.Automatic feed,discharge ... and the vertical bar material are adopted for our machine tool to produce various kinds of ball peens, semi ... , semi- countersinks, interior hexagon and other non-standard head bolts and machine spare parts by using the two-times tapping principles ... -φ323803655650005600×3100×2200 Export machines photos: Bolts making machine