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3.
Chuck up the bit so it extends
the chisel (Figure 13). The correct distance
depends on the wood type and operation.
⁄
1
16
Wrong
Figure 13. Drill bit extension.
G0448 Mortising Machine
⁄
–
/
" beyond
1
3
16
16
–
⁄
"
3
16
Correct
Adjusting the Depth
Stop
Each upper and lower depth stops consist of two
knurled rings that thread up and down the depth
stop rod. One knurled ring acts as a depth stop
by contacting the stop plate. The other knurled
ring tightens against the depth stop ring to lock it
in place.
Adjusting the lower depth stop will make sure
the mortise is not cut too deep and is consistent.
Adjusting the upper depth stop prevents the head
from raising any farther than necessary. Always
make the mortise at least an
tenon to allow room for excess glue.
To adjust the depth stop:
1.
Lower the mortising chisel to the desired
depth of cut.
2.
Tighten the lower depth stop against the bot-
tom of the stop plate as shown in Figure 14.
Lower
Depth Stop
Figure 14. Depth stops controls.
3.
Raise the mortising chisel until it is clear of
the workpiece and tighten the upper depth
stop against the top of the stop plate.
⁄
" deeper than the
1
8
Upper
Depth Stop
Stop
Plate
-19-
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