10
Circular Saw
KU420
OPERATING
INSTRUCTIONS
1. ON/OFF SWITCH
In order to prevent accidental starting, the saw is
equipped with a lock off button. When starting the
circular saw, depress the lock off button then the
safety on/off switch, and release the lock off button,
the machine starts running. To switch off just
release the on/off switch.
2. HAND GRIP POSITION
Hold the machine with both hands while working
and make sure it is stable and secure. Fig. A and B
respectively shows the correct and incorrect ways
to support a large workpiece.
3. FITTING/REMOVING THE SAW BLADE
(Machine parts diagram)
Warning:
Except for the saw blade uninstalled
(included in the package), this circular saw has
been completely installed.
Please carefully inspect the saw blade before
replacement to ensure that the saw blade is not
damaged during transportation.
When removing the saw blade, press the spindle
lock button to prevent the spindle from rotating.
Then loosen the bolt with the socket spanner. Now
remove the outer flange, then lift the movable guard
as far as possible and remove the saw blade. When
replacing the saw blade, hold the movable guard
lever and turn the movable guard clockwise to
open. Make sure that the bore of the blade is on
the inner flange and that the arrow direction of the
blade is the same as that of the movable guard.
Keep the surface of the blade and the press plates
clean. Press the spindle lock button again so that
the outer flange is against the spindle shoulder.
After tightening the blade bolt by hand as far as
possible, tighten an additional 1/4 turn by the
spanner and check whether the blade has been
tightened.
WARNING: Blade teeth are very sharp.
For best cutting results ensure you use a blade
suited to the material and cut quality you need.
4. DEPTH OF CUT ADJUSTMENT
Lift the depth adjustment knob up to raise the body
away from the base plate. Set the cutting depth
using the scale then push the depth locking knob
down to lock (Fig. C, D). In order to be able to cut
the workpiece, it is necessary to set the depth 3
mm thicker than the that of the workpiece.
5. BASE PLATE
Adjusting the angle of the base plate enables bevel
cutting (Fig. E). The base plate must always be
held firmly against the surface of the workpiece to
reduce saw vibration, blade jumping or breakage.
(Fig. F, G)
6. BEVEL CUTTING ADJUSTMENT
Loosen the two base plate bevel lock on the base
plate, rotate the base plate to the desired base plate
angle scale and lock with the lock button (Fig. E).
Then, check the bevel angle of the base plate and
make sure it is firmly locked. Generally, the scale
on the base plate is accurate. However, you are still
recommended to use the protractor or test on the
workpiece before cutting in case you need a precise
angle cutting. While using bevel cuts, please do not
use depth scale to avoid possible errors.
7. CUTTING GUIDE
For straight cutting, keep the 0-degree mark line
of the cutting guide notch on the same line as the
cutting line on the workpiece; while for a 45 degree
angle cut, align it with the 45-degree mark line.
8. PARALLEL GUIDES ADJUSTMENT
To ensure accurate straight cutting, please make
the cut of the circular saw parallel to the edge of the
required cutting distance of the workpiece. Slide the
parallel guide to the required cutting distance and
lock it (Figure H). Parallel guides can be inserted
from both ends of the base plate. The cutting
distance is indicated on the scale of the guide by
the cutting guide notch of 0 to 45 degrees. You
can check whether the cutting distance set by the
machine is correct or not by trial cutting.
9. DUST EXTRACTION OUTLET
To keep tidy, a dust cleaner (such as a vacuum
cleaner) can be attached to the circular saw.
Connect the vacuum adapter to the dust extraction
outlet of the circular saw and connect the hose of
vacuum cleaner to the vacuum adapter. Make sure
the connection to the vacuum adapter is safe (Fig.
I).
