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Placing the hold-down on its shaft upside down
gives another %" clearance for thicker stock, but the
hold-down set screw does not then hit the flat on the
hold-down shaft, so the hold-down may not be as
secure as needed unless special care is taken in
tightening the set screw.
•
Remove the handle.
•
Lie the machine on its back and remove both hex
nuts, washers and socket head bolts.
•
Reverse the base and reinstall the socket head
bolts, washers and hex nuts.
•
Stand the mortiser upright, and clamp the base to
the bench or table. Make sure it is very securely
clamped as the entire weight of the mortising head
is now off the bench.
•
Reinstall the handle.
Figure 17 - Adjust Chisel
CHISEL
ADJUSTMENT
The Chisel must be adjusted parallel to the workpiece's
side for standard mortising.
•
Place a piece of stock of the correct size in the hold-
down, against the fence.
•
Loosen the set screw on the chisel shank.
•
Turn the chisel until its back surface is flat to the
workpiece.
•
Tighten the set screw.
MORTISING
OPERATION
•
Select a sharp chisel of the size needed for the mor-
tise, and install it as described earlier in this manual.
•
Next, set the depth.
•
To move the work to the left to continue the mortise
length, set the chisel opening to the left. To move
work to the right, set the chisel opening to the right.
This helps keep chips form obscuring the work area.
•
Adjust the hold-down securely.
•
Keep a steady, firm hand on the lever and feed the
bit and chisel into the workpiece as fast as the work-
piece accepts the feed without the mortiser motor
stalling. Too slow a speed may burn the bit tip.
•
Light smoke is a normal part of the operation with
some woods, as resins burn off, and chip friction cre-
ates heat. A blued chisel is not a sign of dullness, but
of chip friction heat and resin build-up.
•
The chisel is too dull when a lot of force is needed to
continue working easily. Tip: For through mortises,
use a sacrificial backer board to prevent chip out and
table damage.
MORTISING
INTO THE ENDS OF LONG (OR
SIDES OF THICK)
PIECES
Often, mortises are needed in taller pieces than can fit
under the hold-down when the base is used. In such
cases, rotating the mortiser on its base can be done.
•
Removed the tool holder and tools.
Figure 18-
Reverse Setup
•
Install the fence and hold-down, if those have been
removed.
•
Follow earlier procedures for alignment and cutting.
WARNING:
Turn the switch to OFF position and
unplug mortiser from power source before proceeding
to do maintenance work.
GENERAL
MAINTENANCE
Mortiser will operate best if it is kept in good operating
condition. Keep unit adjusted as described in
"Operation."
•
Do not allow gum and pitch to accumulate on the
tables, fence, blades and blade guard.
•
Apply a thin coat of paste type wax to the tables and
the fence so that the wood slides easily while feed-
ing.
•
Do not allow chips to accumulate on the underside
of the Mortiser.
ADJUSTING
THE HEAD-TO-COLUMN
FIT
A dovetail gib fits into a dovetail way on the mortiser
shaft. On the right side-facing the machine from its
operating position-there are two allen head set screws
with nuts. Inside the dovetail gib, those screws bear on
a steel plate that rides on the dovetail way. This assem-
bly provides an adjustment for wear that comes with
use.
•
Loosen the lock nuts.
•
Adjust upper and lower Allen screws until the gib
moves easily, but not sloppily, on the way. The fit
should be snug, but the movement must also be
easy. No side to side slop should be evident.
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