Craftsman 351.219061 Operator's Manual download pdf (Page 8)

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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Craftsman 351.219061 Operator's Manual Page 8

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