Operation - Makita M8103 Instruction Manual

ASSEMBLY
Installing side grip (auxiliary handle)
CAUTION:
Always be sure that the tool is
switched off and unplugged before installing or
removing the side grip.
► Fig.4: 1. Grip base 2. Teeth 3. Side grip (auxiliary
handle) 4. Protrusion 5. Loosen 6. Tighten
Always use the side grip to ensure operating safety.
Install the side grip so that the teeth on the grip fit in
between the protrusions on the tool barrel. Then tighten
the grip by turning clockwise at the desired position. It
may be swung 360° so as to be secured at any position.
Installing or removing drill bit
CAUTION:
Always be sure that the tool is
switched off and unplugged before installing or
removing the drill bit.
For model M8103
► Fig.5: 1. Drill chuck 2. Chuck key
To install the drill bit, place it in the drill chuck as far as
it will go. Tighten the chuck by hand. Place the chuck
key in each of the three holes and tighten clockwise. Be
sure to tighten all three chuck holes evenly.
To remove the drill bit, turn the drill chuck key counter-
clockwise in just one hole, then loosen the chuck by hand.
After using the chuck key, be sure to return it to the
original position.
For model M8104
► Fig.6: 1. Sleeve 2. Ring
Hold the ring and turn the sleeve counterclockwise to
open the chuck jaws. Place the drill bit in the drill chuck
as far as it will go. Hold the ring firmly and turn the
sleeve clockwise to tighten the chuck.
To remove the drill bit, hold the ring and turn the sleeve
counterclockwise.
Depth gauge
Optional accessory
► Fig.7: 1. Side grip 2. Depth gauge 3. Grip base
4. Hex bolt
The depth gauge is convenient for drilling holes of
uniform depth. Install the depth gauge by the following
sequence.
1. Turn the side grip counterclockwise to loosen the
hex bolt.
2. Insert the depth gauge and adjust the depth of hole.
3. Turn the side grip clockwise so that the depth
gauge and the grip base are fixed on the tool
completely.
NOTE: The depth gauge cannot be used at the posi-
tion where the depth gauge strikes against the tool
body.

OPERATION

CAUTION:
Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip
and switch handle during operations.
► Fig.8
Hammer drilling operation
CAUTION:
There is tremendous and sudden twisting
force exerted on the tool/drill bit at the time of hole break-
through, when the hole becomes clogged with chips and
particles, or when striking reinforcing rods embedded in the
concrete. Always use the side grip (auxiliary handle)
and firmly hold the tool by both side grip and switch
handle during operations. Failure to do so may result in
the loss of control of the tool and potentially severe injury.
When drilling in concrete, granite, tile, etc., slide the action
mode changing lever to the position of
tion with hammering" action. Be sure to use a tungsten-car-
bide tipped drill bit. Do not apply more pressure when the hole
becomes clogged with chips or particles. Instead, run the tool
at an idle, then remove the drill bit partially from the hole. By
repeating this several times, the hole will be cleaned out.
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling operation
CAUTION:
Pressing excessively on the tool will
not speed up the drilling. In fact, this excessive pressure
will only serve to damage the tip of your drill bit, decrease
the tool performance and shorten the service life of the tool.
CAUTION:
Hold the tool firmly and exert care
when the drill bit begins to break through the
workpiece. There is a tremendous force exerted on
the tool/drill bit at the time of hole break through.
CAUTION:
A stuck drill bit can be removed
simply by setting the reversing switch to reverse
rotation in order to back out. However, the tool
may back out abruptly if you do not hold it firmly.
CAUTION:
Always secure workpieces in a
vise or similar hold-down device.
When drilling in wood, metal or plastic materials,
slide the action mode changing lever to the position
of symbol to use "rotation only" action.
Drilling in wood
When drilling in wood, the best results are obtained with
wood drills equipped with a guide screw. The guide screw
makes drilling easier by pulling the drill bit into the workpiece.
Drilling in metal
To prevent the drill bit from slipping when starting a
hole, make an indentation with a center-punch and
hammer at the point to be drilled. Place the point of the
drill bit in the indentation and start drilling.
Use a cutting lubricant when drilling metals. The excep-
tions are iron and brass which should be drilled dry.
5 ENGLISH
symbol to use "rota-