Grizzly G0645, Owner'S Manual

Page: 23 / 36

G0645 Benchtop Mortising Machine
-21-
Basic Mortising
Operations
To make a basic mortise:
1.
DISCONNECT THE MORTISING MACHINE
FROM POWER!
2. Verify that the chisel and fence are square
(see
Installing Chisel
,
Page 18
) and adjust
as needed.
3. Secure the fence lock handles, place a piece
of scrap lumber the same dimensions as the
workpiece flush with the fence, and set the
depth stop (see
Adjusting Depth Stop Rod
,
Page 19 ).
HAND INJURY HAZARD!
During the next step, keep fingers and hands
away from chisel and drill bit path when cut-
ting the mortise.
Figure 27 . Aligning chisel with outline.
4. Layout the desired mortise on the test piece.
5. Position and lock the hold down.
6. Align the chisel with the mortise outline (see
Figure 27
), turn the power
ON
, and use the
hand lever to steadily feed the mortising
chisel into the test piece.
—The feed rate must be fast enough to
prevent the tip of the bit from burning, but
slow enough to prevent the motor from
stalling. This speed will vary depending on
the wood type, moisture content, and fre-
quency of chip clearing from the mortise.
—When cutting deep mortises, make a 1"
deep cut, then back off and allow the chips
to clear before cutting deeper.
Note: Some chisel noise and smoke is
normal, but we recommend using a small
amount of lubrication on the drill bit (not the
chisel) to keep this to a minimum. See
Page
24
for more information on lubricating the drill
bit.
7. When the desired depth is achieved, move
the hand lever back to the upper position.
The test piece should remain in place as this
is done.
8.
Turn the power
OFF
.
9.
Check the placement of the hole on the test
piece, and adjust the fence if necessary.
When the desired accuracy of placement is
achieved, repeat
Steps 4-8 on the actual
workpiece.
10.
When making rectangular mortises, follow
the sequence of cuts shown in
Figure 28 .
Position the chisel over the center of cuts
5, 6 and 7, since these only use part of the
chisel.
� � � � � � �
Figure 28
. Sequence of cuts.
Pulling down on the handle can be diffi-
cult on some woods. However, NEVER use
a cheater pipe or handle extender on the
handle. You could break the hand lever and
be seriously injured.