MS3816 Hollow Chisel Mortiser
V.02 01-11-2010
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INSTALLING CHISEL & BIT
1. Loosen lock screw, shown in Figure 7.
Fig 7 Fig 8
2. Insert chisel bushing (with the hole facing forward) into the head. Tighten the screw just
enough to hold the chisel in place.
!
NOTE: Set the slot in the side of the chisel
to the left or right,
NOT to the front or back. This will allow
chips to escape when cutting mortises.
3. Push the chisel up as far as possible into the head. Then lower the chisel approximately 0.8mm to
1.6mm, depending on the type of wood being worked. Tighten the screw to hold chisel in place.
4. Push bit up through the chisel opening as far as it will go. Lock the drill bit in place with the chuck key.
5. Loosen screw and push chisel up against the bushing, then tighten screw. This should provide
the proper distance between the points of the chisel and the bit.
MAINTENANCE
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 & 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.
1. 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. See Fig. 8.
Do not file the outside edge of the spur as this will affect the diameter of the bit.
2. 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 three turns of the cutter in a carpenter's brace chuck should
be enough to sharpen the chisel, as shown in Fig. 9.
