Hitachi Koki DC 120VA, Инструкция по эксплуатации, Страница: 6 / 38

4
English
(3) Dust Extraction Range
䡬
Dust Sucker-Large ( Fig. 5-
1
)
䡬
Dust Sucker-Small ( Fig. 5-
2
)
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Dust Swivel ( Fig. 5-
3
)
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Extention Rod for Dust Swivel (Length 230mm)
(
Fig. 5-
4
)
CAUTION:
When using the dust swivel, connect the vacuum
cleaner hose before turning on the main unit
switch.
Used to such chips by connecting a vacuum cleaner.
Optional accessories are subject to change without notice.
APPLICATIONS
䡬
Drilling various blocks and bricks products
䡬
Boring holes in metals, wood and plastics.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position. If
the plug is connected to a receptacle while the power
switch is in the ON position, the power tool will start
operating immediately, which could cause a serious
accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
CAUTION:
Damaged cord must be replaced or repaired.
4. Mounting the side handle
Mount the side handle in the main body, as shown in
Fig. 1 .
Rotate the handle in clockwise direction to tighten
the side handle and rotate it in counterclockwise
direction to loosen it.
When mounting the side handle, loosen the handle
and mount the side handle to the gear cover. Then
press it to the proper position in the side handle
Fig. 5
1
2
3
4
mounting section of the gear cover and tighten it.
Before operation, securely tighten the side handle.
(The side handle can be secured in any position over
360°.)
5. Clamping
Insert the diamond core bit or drill bit as far as it will
go into the open chuck. Clamp tightly in normal
manner by inserting the toothed end in the chuck
wrench into the three key holes.
PRACTICAL HANDLING PROCEDURES
1. Switch operation
Switching-on: Push the trigger.
Switching-off: Release the trigger.
CAUTION
Securely hold the handle of the main body and the
side handle when switching on as there is danger
that your hands may be turned by force of reaction.
2. Relationship between material to be drilled and
optimum number of rotation
The relationship between the material to be drilled
and the optimum number of rotation may slightly
differ depending upon the working condition, power
supply situation, etc. Use the tool referring to
TABLE 1 as a rough guide.
For drill positioning, you will find it easier to work if
you turn the dial once and set it to the low speed.
CAUTION:
䡬
If you exceed the standard values (optimum numbers
of rotation) given in the table or engage in continued
work for an extended period of time or perform a
drilling job on soft materials, the motor may be
subjected to an unreasonable load and may result in
burnout. Especially, avoid such an abnormal way of
use as a case where a drill stops during the drilling
work. Adjust the number of rotation so that a smooth
drilling job can be done at all times.
䡬
Make absolutely certain that you never use any tool
with more than the maximum capacity as otherwise
the service life of the main unit may be extremely
shortened.
3. 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.
4. Diamond Core drilling
(1) Place the diamond core bit in the drilling location.
(2) When drilling, always hold the tool squarely against
the material.
(3) Do not force the core bit, but allow the core bit to do
the work. This will prolong the life of the core bit and
reduce breakage.
(4) Ensure that masonry dust/swarf produced during
drilling is regularly removed. Allowing dust/swarf to
accumulate will result in overheating and excessive
clutch/torque limiter wear and loss of segments from
the core bit.
(5) When entering or leaving a hole, ensure that the core
bit is rotating.