Grizzly G0645, Owner'S Manual

Page: 20 / 36

-18-
G0645 Benchtop Mortising Machine
Installing Mortising
Chisel
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°.
Figure 20
. Drill bit extension.
Wrong Correct
1
⁄
16
–
3
⁄
16
"
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.
Figure 19 . Inserting chisel into bushing.
This mortising machine uses
5
⁄
8
" shank chisels
ranging from
1
⁄
4
"–
1
⁄
2
". If you want to use chisels
that did not come with this machine, make sure
they conform to the dimensions in the
Figure 18
.
Chisel
Chuck
6.
Open the chuck access cover.
7.
Using the chuck key, tighten the drill bit into
the drill chuck so the tip extends
1
⁄
16
"
—3
⁄
16
"
beyond the chisel, as shown in
Figure 20
.
The correct distance depends on the wood
type and operation.
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.
Figure 18
. G0645 chisel and drill bit dimensions.
Bit
Bushing
A
C
3" Cut Depth
1
⁄
2
" Minimum Chuck Grab
5
/
8
" Max. Dia.
B
Lock Set
Screw
Chisel Min.
Overall
Bit
Length
(A)
Max
Drill Bit
Dia.
(B)
Min.
Overall
Chisel
Length
(C)
1
⁄
4
" 6
1
⁄
4
"
11
⁄
64
" 4
1
⁄
4
"
5
⁄
16
" 6
1
⁄
4
"
7
⁄
32
" 4
1
⁄
4
"
3 ⁄
8
" 7 5 ⁄
16
" 17 ⁄
64
" 5 1 ⁄
2
"
1
⁄
2
" 7
5
⁄
16
"
3
⁄
8
" 5
1
⁄
2
"