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Installing Mortising
Chisel
This mortising machine uses
ranging from
⁄
"–
⁄
". If you want to use chisels
1
1
4
2
that did not come with this machine, make sure
they conform to the dimensions in the Figure 18.
A
C
3" Cut Depth
⁄
" Minimum Chuck Grab
1
2
Chisel
Min.
Overall
Drill Bit
Bit
Length
(A)
⁄
"
6
⁄
"
1
1
4
4
⁄
"
6
⁄
"
5
1
16
4
⁄
"
7
⁄
"
3
5
8
16
⁄
"
7
⁄
"
1
5
2
16
Figure 18. G0645 chisel and drill bit dimensions.
To install a mortising chisel:
1.
DISCONNECT THE MORTISING MACHINE
FROM POWER!
2.
Lock the headstock in the fully raised posi-
tion.
3.
Put on a pair of leather gloves to protect
your hands, or wrap a shop towel around the
sharp end of the chisel. Place a wood scrap
on the table to protect it during chisel and bit
installation.
-18-
⁄
" shank chisels
5
8
B
/
" Max. Dia.
5
8
Max
Min.
Overall
Dia.
Chisel
(B)
Length
(C)
⁄
"
4
⁄
"
11
1
64
4
⁄
"
4
⁄
"
7
1
32
4
⁄
"
5
⁄
"
17
1
64
2
⁄
"
5
⁄
"
3
1
8
2
4.
Slide the bit into the chisel and loosen the
chisel lock set screw (Figure 19) on the
headstock.
5.
Insert the chisel into the bushing shown in
Figure 19, and tighten the chisel lock set
screw.
Bushing
Chisel
Figure 19. Inserting chisel into bushing.
6.
Open the chuck access cover.
7.
Using the chuck key, tighten the drill bit into
the drill chuck so the tip extends
beyond the chisel, as shown in Figure 20.
The correct distance depends on the wood
type and operation.
⁄
–
1
16
Wrong
Figure 20. Drill bit extension.
8.
Rotate the chuck by hand and make sure no
binding occurs.
—If binding occurs, loosen the chisel lock set
screw and rotate the chisel 90°.
G0645 Benchtop Mortising Machine
Chuck
Lock Set
Screw
Bit
⁄
"
⁄
1
3
16
—
16
⁄
"
3
16
Correct
"
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