Functional Description - Makita 3620 Instruction Manual

10. Before using the tool on an actual workpiece, let it
run for a while. Watch for vibration or wobbling
that could indicate improperly installed bit.
11. Be careful of the bit rotating direction and the feed
direction.
12. Do not leave the tool running. Operate the tool
only when hand-held.
13. Always switch off and wait for the bit to come to a
complete stop before removing the tool from
workpiece.
14. Do not touch the bit immediately after operation; it
may be extremely hot and could burn your skin.
15. Do not smear the tool base carelessly with thinner,
gasoline, oil or the like. They may cause cracks in
the tool base.
16. Draw attention to the need to use cutters of the
correct shank diameter and which are suitable for
the speed of the tool.
17. Some material contains chemicals which may be
toxic. Take caution to prevent dust inhalation and
skin contact. Follow material supplier safety data.
18. Always use the correct dust mask/respirator for
the material and application you are working with.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity with product (gained
from repeated use) replace strict adherence to safety
rules for the subject product. MISUSE or failure to
follow the safety rules stated in this instruction
manual may cause serious personal injury.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Adjusting the depth of cut
Place the tool on a flat surface. Loosen the screw
securing the stopper pole. (Fig. 1)
Loosen the lock lever and lower the tool body until the bit
just touches the flat surface. Tighten the lock lever to lock
the tool body. (Fig. 2)
Next, lower the stopper pole until it makes contact with the
adjusting hex bolt. Align the depth pointer with the "0"
graduation.
Raise the stopper pole until the desired depth of cut is
obtained. The depth of cut is indicated on the scale (1 mm
per graduation) by the depth pointer. Then tighten the
screw to secure the stopper pole.
Now, your predetermined depth of cut can be obtained by
loosening the lock lever and then lowering the tool body
until the stopper pole makes contact with the adjusting
hex bolt. (Fig. 3)
CAUTION:
• Since excessive cutting may cause overload of the
motor or difficulty in controlling the tool, the depth of cut
should not be more than 15 mm at a pass when cutting
grooves with an 8 mm diameter bit.
• When cutting grooves with a 20 mm diameter bit, the
depth of cut should not be more than 5 mm at a pass.
When you wish to cut grooves more than 15 mm deep
with an 8 mm diameter bit or more than 5 mm deep
with a 20 mm diameter bit, make several passes with
progressively deeper bit settings.
Stopper block (Fig. 4)
The stopper block has three adjusting hex bolts which
raise or lower 0.8 mm per turn. You can easily obtain three
different depths of cut using these adjusting hex bolts
without readjusting the stopper pole.
Adjust the lowest hex bolt to obtain the deepest depth of
cut, following the method of "Adjusting depth of cut".
Adjust the two remaining hex bolts to obtain shallower
depths of cut. The differences in height of these hex bolts
are equal to the differences in depths of cut.
To adjust the hex bolts, first loosen the hex nuts on the
hex bolts with the wrench and then turn the hex bolts.
After obtaining the desired position, tighten the hex nuts
while holding the hex bolts in that desired position. The
stopper block is also convenient for making three passes
with progressively deeper bit settings when cutting deep
grooves.
CAUTION:
When using a bit having total length of 60 mm or more, or
edge length of 35 mm or more, the depth of cut cannot be
adjusted as previously mentioned. To adjust, proceed as
follows:
Loosen the lock lever and carefully adjust bit protrusion
below the tool base to the desired depth of cut by moving
the tool body up or down. Then retighten the lock lever to
lock the tool body at that depth of cut. Keep the tool body
locked at this position during use. Since the bit always
protrudes from the tool base, be careful when handling
the tool.
Adjusting the lock lever (Fig. 5)
The locked position of the lock lever is adjustable. To
adjust it, loosen the lock lever 3/4 turn and press the
center of the lock lever. The hex nut will come out. Set the
hex nut to the desired position and tighten the lock lever.
Switch action (Fig. 6)
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
"OFF" position when released.
To start the tool, simply pull the switch trigger. Release the
switch trigger to stop.
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