How an aeroplane is built . 3 BOX TOOL DRILL CHUCK Fig. 20. 127 HOW AN AEROPLANE IS BUILT Having completed the turning down ofthe hexagon steel bar to the required dia-meter and length, which, by the way, is alldone in one cut, comprising the roughingand the finishing cut, the next operation isto reverse the movement of the lever, andmove the capstan head back. This movement brings into position thebutton die, or what is frequently used,when obtainable, a geometric die head,containing the dies. Pull the lever for-ward, and gently but quite firmly press thedie up against the end of the
How an aeroplane is built . 3 BOX TOOL DRILL CHUCK Fig. 20. 127 HOW AN AEROPLANE IS BUILT Having completed the turning down ofthe hexagon steel bar to the required dia-meter and length, which, by the way, is alldone in one cut, comprising the roughingand the finishing cut, the next operation isto reverse the movement of the lever, andmove the capstan head back. This movement brings into position thebutton die, or what is frequently used,when obtainable, a geometric die head,containing the dies. Pull the lever for-ward, and gently but quite firmly press thedie up against the end of the bolt. Thedie will then commence to cut the pressing until the lever will travelno further. The die will continue to cutprobably a couple more threads, and thenthe die head will automatically becomedisengaged from the hollow die headholder, and will continue to travel roundwith the bolt. Reverse the belt drive, if fitted, as itshould be, and the die will work itself offthe bolt. Having completed the cutting of thethread on the
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Keywords: ., bookcentury1900, bookdecade1910, bookidhowa, booksubjectairplanes
