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14
Do not have the chisel slot
against the blind end of the mortise, as the
chips will not be able to clear the chisel.
This can cause overheating and possible
breakage of chisel or bit.
When cutting deep mortises, make the cut in
several stages of approximately 1" each, to
allow chips to clear. To prevent breakout at the
back of the workpiece when cutting through
mortises, use a piece of scrap material under
the workpiece as support.
Maintenance
Before any intervention on
the machine, disconnect it from the
electrical supply by pulling out the plug or
switching off the main switch! Failure to
comply may cause serious injury.
General
A coat of paste wax applied to the table and
column will help to keep the surfaces clean.
If the power cord is worn, cut, or damaged in
any way, have it replaced immediately.
The Mortiser requires only minor maintenance,
such as cleaning and lubrication and routine
adjustment and sharpening of the chisel and
bit.
Dust the machine down after each use and, as
necessary, use light applications of oil or
grease to lubricate linkages, moving parts, etc.
Sharpening Chisel and Bit
The chisel and bit should be kept sharp for best
performance. Blunt edges will give inaccurate
mortises and can lead to overheating and
breakage to chisel or bit. If chisel and bit are
badly worn and become difficult to sharpen,
they should be replaced.
Bit
Sharpen the bit by using a small, smooth file,
following the original shape of the bit. File the
inside edge of the spur, the sides of the brad
point, and the cutting edge inwards toward the
flute of the bit (Figure 15).
Do not file the outside edge of the spur, as this
will affect the diameter of the bit.
Chisel
Sharpen the chisel with a mortise chisel cutter
with the correct size pilot. (Pilot size will differ
depending on the size of your chisel). Two or
Figure 14
Figure 15
Figure 16