GTB/GSB

Fig. 16 Fig. 17
Drilling Depth (Fig. 18)
When drilling blind holes. take the drill quill down with the machine off and set the bit to the piece to be drilled.
Now. loose the down stop and zero (set to “0) the scale. Clamp the stop again and read the current down
depth on the scale.
Quill Return Spring (Fig. 19)
An automatic return mechanism is fitted on the quill. The main components are a spring and a grooved
chromium-plated housing. The spring is factory-set as appropriate and the setting should not be changed
Fig. 18 Fig. 19
IMPORTANT NOTICE: the nut should not be tightened too firmly. If the nut tightening is too firm. quill
movement is made more difficult.
27