Hitachi Koki DC 120VA Instrucciones De Manejo página 7

TABLE 1
Materials to be drilled
Brick, Block
ALC t3.0
Steel
SPCC t3.0
Stainless steel
t1.6
Wood
t50
Steel SPCC t3.0
Wood t50
(6) If the core bit starts to vibrate and when the core bit
begins to break through the material, reduce pressure
immediately.
(7) After use, store the core bit carefully in its box and
remember that it is a diamond core bit.
cDrilling method by using Pilot Spigotv
For easy positioning, carry out the following steps
when using a diamond core bit.
(1) Make a pilot hole at the center position of the material
to be drilled with a 13 mm stone drill bit.
(2) Attach a pilot spigot to a diamond core bit.
(3) Align the pilot spigot to the pilot hole and begin the
drilling operation to make a guide groove.
(4) When making the guide groove, temporarily stop the
drilling operation and remove the pilot spigot.
(5) Align the diamond core bit with the guide groove and
start the drilling operation again.
CAUTION
When drilling with a diamond core bit, there will be a
high force of reaction load to your hands. Make sure
to hold the handle of the main body and the side
handle.
Safety-Release Clutch
This tool is equipped with a positive type Safety-
Release Clutch. The clutch will slip when a certain
torque level is required, causing the motor to
disengage from the output shaft. When this happens,
the chuck will stop turning.
CAUTION
Immediately pull away the main body when the
Safety-Release Clutch starts its operation.
Shift lever indication
Drill
Types of drills
diameters
φ27
Diamond
core bit
φ65
φ152
φ27
Hole saw
φ65
φ120
φ15
Hole saw
φ55
φ15
Hole saw
φ55
φ27
Hole saw
φ65
φ120
φ13
Drill
φ30
Drill
1
[Low speed gear]
A B C D
Do not continue to operate the tool for more than two
seconds while the clutch is slipping.
Do not let the Safety-Release Clutch activate too
frequently.
5. Drilling with a conventional drill bit
(1) Drilling in wood
Use a woodworking drill bit. However, use an
metalworking drill bit when drilling a hole which is
less than 6.5 mm in diameter. The usable drill bit
diameter is maximum 30 mm.
(2) Drilling in mild steel or plastics
Use a conventional metalworking drill bit. The usable
drill bit diameter is minimum 1.2 mm and maximum
13 mm.
CAUTIONS
Pressure:
Drilling will NOT be accelerated by placing heavy
pressure on the drill. Such action will only result in a
damaged drill bit, decreased drilling efficiency, and/
or shortened service life of the drill.
Using a large diameter drill bit:
The larger the drill bit diameter, the larger the reactive
force on your arm. Be careful not to lose control of
the drill because of this reactive force. To maintain
firm control, establish a good foot-hold, hold the drill
tightly with both hands, and ensure that the drill is
vertical to the material being drilled.
When drilling completely through the material:
When the drill bit bores completely through the
material, careless handling often results in broken
drill bit or damage to the drill body itself due to the
sudden movement of the drill.
Always be alert and ready to release pushing force
when drilling through the material.
English
2
[High speed gear]
Dial
E A B C D E
6