909 DWL850 Instruction manual - Operation
8
Operation
Note.
Always ensure that the tool is switched off and the
plug is removed from the power point before making any
adjustments or maintenance procedures. Always wear
sturdy gloves when handling or changing drill bits, as they
can be very sharp.
On/off switch
Push the on/off switch (1) forward
and up over the latching ramp to
lock the switch on.
To turn the tool off, press the rear
of the switch and lift it over the
latching ramp.
Motor housing
Take care not to cover the ventilation grills when holding the
tool whilst drilling.
Carbon brush caps
To gain access to the carbon brush and spring sets,
unscrew the two brush cap covers (3).
Bit holder
To replace or change drill bits,
rotate the bit holders (4) until
the bit clamping screws (5) are
accessible from the top of the
machine.
Loosen the clamping screws (5)
with the hex key (21) provided.
Remove the unwanted drill bits
and insert the replacement bits (6) with the flat of the shank
under the clamping screw.
Tighten the clamping screws and check that the bits are
firmly secured.
Note.
Push the new bits in so that they bottom out.
Note.
After replacing drill bits it is necessary to reset the
zero position as detailed in “Adjusting the zero position”.
Bit clamping screw
When tightening a bit clamping screw, take care that the flat
of the shank of the drill is directly under the screw.
Drill bit
The tool is supplied with two 10mm drill bits fitted.
Dust extraction port
Always attach a suitable
workshop vacuum or dust
collector to the dust extraction
port (7).
Handle
Hold the tool with two hands
during operation. One hand on
the housing (2) and the other on
the handle (8).
Bevel guide
The bevel guide (9) can be
swivelled through 90° to suit the angle at which the dowel
holes are to be drilled in the work piece. It is commonly
used when working on a mitred edge.
The angle of bevel can be read on the scale.
There are “click” stops at 22.5°, 45° and 67.5° to allow
quick setting to these common angles.