Sealey SM94 - Manual (Page 4)

SM94.V4 Issue No.1 031209
Original Language Version

wArNiNG! Ensure you read, understand and apply chapter 1
safety instructions before use.
7.1 Ensure you have installed the correct chisel and that it is
sharp. Ensure that the opening in the side of the chisel faces
to the left or right depending on which direction the workpiece
is to be moved in. refer to section 5.5.
7.2 Set the depth stop. refer to section 6.1.4.
7.3 Place your workpiece in the mortiser adjusting the back stop
and hold down clamp as necessary. refer to sections 6.2 & 6.3.
7.4 Plug the mortiser into the mains power supply. Hold the
workpiece firmly against the back stop and switch the
mortiser on, keeping hands and fingers away from the cutting
tools.
7.5 Bring the handle down to commence mortise cutting. We
recommend that you practice on scrap wood before moving
onto an actual workpiece. the rate of chisel penetration must
be fast enough to prevent burning the drill and chisel tip, but
not too fast as to stall the motor. You may notice smoke
coming from the bit or the wood once the chisel has engaged
in the workpiece. this is a normal occurrence of hollow chisel
mortising caused by chipping friction whereby the wood
resins in the stock are burned off. Should this become
excessive however, refer to troubleshooting chapter 9.
the chisel may also become blue in colour, this is also a
normal attribute associated with friction and resin build up on
the cutting face of the tool bit. A dull (blunt) chisel may be
detected when the amount of pressure required to complete a
cut becomes excessive.
7.6 When performing a through mortise, a thin piece of wood
must be placed between the workpiece and the table to
prevent the underside of the cut from splintering, and to
protect the work table. In such a case re-set depth stop
accordingly.
7.7 Using the mortiser as a standard pillar drill
Loosen bushing screw and remove the chisel and drill bit
from the chuck.
Attach the chuck arbor extension spindle (fig.1-9) to the
neck of spare drill chuck (fig.1-10). Pass the spindle up
through, But Do Not tighten the screw on the drill spindle
which must remain free to turn in the bush. A standard drill bit
may be used with chuck (10) for drilling. All locks and guides
are used in the same way as for mortising.
8. mAiNteNANce
 wArNiNG! Ensure the mortiser is switched off and is
unplugged from the mains power supply before carrying out
any maintenance.
8.1 clean and dust the mortiser, removing all waste materials.
8.2 Periodically apply a light coat of wax to base work surface
which will help keep it clean and rust free.
8.3 open shaft cover and apply a thin coat of light machine oil to
drill bit shaft where it passes through the chisel, but not on the
cutting edge. Also lightly oil rack and pinion gear teeth upon
which the main column moves up and down.
7. oPerAtiNG iNstrUctioNs

wArNiNG! Ensure the mortiser is switched off and is
unplugged from the mains power supply.
6.1 raising and lowering the mortiser head.
6.1.1 handle. use the handle (fig.8) to raise and lower the head.
6.1.2 Pull the handle towards you to lower the head.
6.1.3 Allow the handle to return to raise the head.
6.1.4 Depth stop adjustment. See E in fig.6. the depth stop
limits the depth of chisel cut. to adjust the depth stop, loosen
lock knob (fig.6f) and lower the head until the bottom of the
chisel is at desired depth. raise the depth stop until it makes
contact with the underside of the head and re-tighten knob.
6.2 Back stop. to position the back stop, loosen locking handle
(fig.6D). Position back stop by moving it in or out as indicated
above, when correctly positioned re-tighten locking handle.
6.3 hold Down clamp adjustment. the clamp (fig6A) prevents
the workpiece from lifting as the chisel is raised up from the
cutting hole. Adjust the clamp so that it rests on the top of the
workpiece but will allow the workpiece to slide to the left
or right. the clamp may be turned upside down to
accommodate thicker workpieces. to adjust the clamp
loosen the knob B and move the clamp up or down as
required and re-tighten the knob.
6.4 Parallel chisel adjustment. See fig.7. Adjust the position of
the workpiece until it is almost touching the back of the
chisel (Y). Loosen the chisel retaining screw (X) to allow it to
rotate and edge the workpiece up to the back of the chisel to
ensure that the chisel is parallel to the surface of the
workpiece. re-tighten the locking screw and reposition the
workpiece for cutting. See fig.8.
6. coNtrols AND ADJUstmeNts
Fig.6
Fig.7
Fig.8