9
4. BLADE INSTALLATION / RENEWAL
4.1 Before installing or removing blades, ensure the saw is
switched OFF and disconnected from the power supply.
Remove the blade as follows:
a. Slacken off blade tension by turning the tensioner
anticlockwise at least two turns.
b. Very carefully prise oput the Table insert.
c. Remove the side cover - 3 screws.
d. Apply a slight downward pressure on the upper arm
whilst holding the blade firmly, allowing the pins at the
top of the blade to be disengaged from the recesses
in the upper blade holder. It is now a simple matter to
Fig. 5
NOTES ON SAW BLADES
disengage the blade pins from the lower blade holder and lift the blade out through the
access hole in the table.
NOTE:
Whilst the blade is out of the housings, look at the blade housings closely. You will observe that the blade slots
and pin recesses are made so you can position the blade for cutting from the front, or from the side (see fig.
5). Cutting from the side is necessary when your workpiece is over 16" long.
IMPORTANT:
Side cutting can only be performed when the bevel is set at 0
O
.
4.2 With the blade teeth pointing DOWNWARDS, slot the new blade into the lower housing so
that the pins on the end of the blade, engage in the recess in the holder. Holding the
blade firmly, apply downward pressure to the upper arm, whilst slotting the pins in the upper
end of the blade into the slot in the upper holder, again, making sure the blade pins correctly
engage in the recess in the holder.
4.3 Replace the table insert and side cover, then re-tension to the blade, by turning the tension
knob (19) clockwise until you feel the blade is firm. Check to ensure that the blade pins are
properly seated, top and bottom.
BLADES BREAK FOR FIVE PRINCIPAL REASONS
:
1.
Too much tension or too little tension on the blade.
2.
Overworking the blade by feeding the workpiece too fast.
3.
Twisting or bending the blade by feeding the workpiece off-centre.
4.
Over use - the blade has reached the end of its useful life.
5.
Feeding too much material into the saw, - more than the maximum 2" depth for which it
was designed.
HOW TO DETERMINE THE RIGHT BLADE FOR THE JOB
This scroll saw accepts a wide variety of blade widths and thicknesses. The width of the blade ,
the thickness of the blade, and the number of teeth per inch (TPI) are determined by the type of
material and size of the radius being cut. Here are several examples:
TPI
WIDTH
THICKNESS
MATERIAL
NOTE
10
2.8mm
0.5mm
Medium curves on 1/4" to 1-3/4"
0.11"
0.020"
wood, wallboard, hardboard.
15
2.8mm
0.5mm
Same as above, plus wood
0.11"
0.020"
1/8" to 1-1/2" thick
18
2.4mm
0.25mm
Extra thin cuts on soft woods to 1/4"
0.095"
0.011
and parquetry
As a general rule, select the
narrowest blades
recommended for intricate
curve cutting and widest
blades for straight and large
curve operations.
