Milling:
The drill head can be swivelled through 45
o
vertically to either side on a graduated
scale.Provision is made for locking the head by three nuts, one of each side and one
beneath of the spindle housing.
The head is secured in the zero position by means of a fixed stop.
When milling, the quill should be firmly locked. Vibrations and strokes occur when
milling, therefore, the tool has to be firmly locked in order not to loosen from the
taper. To reduce the vibrations, we recommend the use of cutters with more than two
cutting edges, preferably spiral fluted, in order that at least one cutting edge is
working at all times. For the sake of stability, one should work with as short tools as
possible.
By setting a cutting according to the scale, one should not loosen the locking screw
more than necessary to be able to lower the quill. If the locking screw is loosened
completely, the return spring on the feed shaft can raise the quill as much as the play
in setting of fine feed will allow. Consequently, the setting on the scale is lost.
See to it that the slide bars of the table are correctly tightened. The slide not in use
should be locked.
Boring:
Despite the fact that great care is always devoted to get as minimal a play as possible
between the teeth of the rack and those on the feed shaft, there always exists a little
play. When boring there is a risk that the quill will be pulled down by the tool as far
as the play will allow. This risk can be reduced by having the cutting edge inclined,
so that any axial force that might occur will be directed upwards.
Automatic drill ejector:
This machine is equipped with automatic drill ejector. Between the nose of the quill
and the spindle house there is a pivoting finger stop which prevents the spindle to
reach its top position.
By swinging outward the pivoting finger stop away from the spindle and raising the
quill by means of the feed lever the tool get loose. In case of tight direct pressure and
change of heat in the spindle the tool might have got caught firmly in the spindle. In
such a case we recommend to use an ordinary drill ejector instead of the automatic
one.
NOTE!
Always see to it that the tongue of the tool is properly cleaned in order to
avoid unnecessary wear and tear in the holder of the quill.
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