The mentioned drilling machines are typical for their stage speed change, hand and mechanical shift, structural rigidity and operational reliability.  They are intended for drilling, turning and cutting the threads with reversing heads both in piece and series production. 

The headstock is vertically re-adjustable and rotating at the column.  The drive of the gearbox is made by means of a V-belt from the electro-motor with a possibility of stretching the belt.  The machines are equipped with three rows of the spindle speed.  The change of the row is made by shifting the belt on 3 step pulleys.  The respective speed steps are shifted by two hand levers...

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