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3.3
Slot mortise distance from top edge of
timber
Measuring rod 16 (Fig. 2) has been adjusted in
such a way that the upper edge of setting ring 40
corresponds with the upper edge of the slot to be
cut.
• Pull back support bracket 4.
• Release clamping levers 5, 7 and 8.
• Set desired distance according to scale 16 by
turning handle 10 and then retighten clamping
levers 5, 7 and 8.
3.4
Pivoting range
To cut slots at an angle the slot mortising device can
be pivoted up to 45° to either side.
• If necessary, turn frame 21 (Fig. 2) around to the
other side.
• Loosen screws 17 and 18 which hold the pivoting
plate and tighten them again when the angle
required is reached.
3.5
Adjusting the cutting depth
The depth of the slot can be preselected by means
of depth stop 19 (Fig. 2).
4
Operation
4.1
Operating instructions
After setting the slot mortise distance, slide support
bracket 4 (Fig. 2) forwards as far as it will go to give
the chain bar optimum support and engage it.
With slot lengths exceeding 50 mm
(1 31/32 in.) begin mortising at the right
marking. When the first cut has been
completed, pull out the machine, move it
sideways to the left and make the sec-
ond cut.
When making more than one cut it is recommended
to use the quick-action clamping device.
• First clamp clamping support 25 tight with hand-
wheel 26.
• Eccentric lever 20 allows to loosen and retighten
the clamping device quickly.
With the guide pieces stored in magazine 27 it is
possible to cut slots of different widths with one
chain bar (s. chart on page 19).
Stops 23 and 28 define the upper and lower edge of
the slot for fast resetting.
When moving the SG 500 clamp down column sup-
port 3 with clamping screw 24.
4.2
Securing the machine against moving
sideways
The inside of the clamping support must be in con-
tact with the workpiece. Clamp the entire slot mortis-
ing device tight with the handwheel. To move the
device sideways for longer slots, release the tension
with eccentric lever 20, move the device and then
clamp tight again.
5
Maintenance
The roller bearing of the chain bar should be kept
well greased. The grease gun is provided for this
purpose which should be pressed into the hole at the
tip of the bar (only acid-free ball bearing grease of
good quality should be used)!
The chain should be immersed in thin oil every time
it has been resharpened. When the chain is being
used very frequently it should be oiled several times
a day!
Before re-tensioning the chain let it cool down.
MAFELL machines are designed to be
low in maintenance. After a prolonged
period of operation, users are recom-
mended to have the device checked by
an authorized MAFELL customer service
shop.
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