Hitachi Koki NV 75HMC Mode D'emploi page 14

English
NOTE:
In intermittent operation, you cannot drive nails with
the trigger still held down, by again pressing the
push-lever up against the target spot. To continually
drive nails one after another, release your finger
from the trigger and switch to "continuous operation".
If a nail driver placed on the floor (push-lever pressed
against the floor) is picked up while pulling the trigger,
the nail driver will shift to single shot and it may be
impossible to shoot nails even if the push-lever is
pressed against something. If that happens, release
your finger from the trigger and then try driving nails
again.
CAUTION
Exercise care when nailing corners of lumber. When
continuous nailing corners of lumber, a nail may go
astray or break through the corner.
NOTE:
Precautions on no-load operation.
Sometimes nailing will continue after driving in all
nails previously contained in the magazine.
This is termed "no-load operation". Such operation
may deteriorate the bumper, magazine, and nail feeder.
To avoid no-load operation, occasionally confirm the
amount of remaining nails. On the other hand, all
nails should be removed after using this nailer.
After completing operation, put into the body about 2
cc oil through the hose joint to protect the tool from
rust.
Under low temperature conditions, the machine
sometimes does not operate correctly. Always operate
the machine at the appropriate ambient temperature.
3. Driving nails into steel plating
CAUTION
Use C-beam steel with a thickness of 3.2 mm or less.
Use hardened nails designed for use with steel plating.
Place the nailer vertically over the location into which
the nail is to be driven.
When galvanized steel or other metal plates are to be
attached directly onto C-beam steel, make sure they
are 0.7 mm or less in thickness.
Also, make sure that nails designed for use with steel
plating with a length of 32 mm are used.
Do not use the nailer on roofs or ceilings.
Make sure that the thickness of the hardened nails
designed for use with steel plating are of the correct
thickness for the C-beam steel.
NOTE:
Use the single shot setting to improve the finish after
the nails have been driven in.
Refer to the following table to select the correct nail shaft
diameter and length.
[Selecting Nail Shaft Diameter]
C-Beam Steel Thickness
2.3 mm or less
3.2 mm or less
13
Nail Shaft Diameter
2.8 to 3.0 mm
3.0 mm
[Selecting Nail Length]
Material Thickness
Galvanized iron and other metal plates
0.7 or less (direct attachment)
1.8 to 22 mm
14 to 35 mm
15 to 45 mm
22 to 47 mm
30 to 55 mm
57 mm and 65 mm nails cannot be used on C-beams
with a thickness of 3.2 mm.
Make sure C-beam steel with a thickness of 2.3 mm or
less is used.
C-beam Steel
(Thickness: 1.6 mm to a
maximum of 3.2 mm)
NOTE:
Holding power will be greatly decreased if nails are
driven too hard into steel plating. Rotate the adjuster
downwards to adjust the depth of the nails.
There are cases in which the nails will not be driven
in sufficiently depending on a combination of the
hardness and thickness of the C-beam or material.
The external material
and steel plating is not
deformed.
4. Driving nails into concrete
CAUTION
Use hardened nails designed for use with concrete.
Place the nailer vertically over the location into which
the nail is to be driven.
Do not drive nails directly into concrete or attach
metal plates directly onto it.
Do not drive nails into the edge of concrete.
Do not use the nailer in locations from which other
items are suspended (suspended pipes, etc.).
NOTE:
Only use the nailer on concrete that has not yet set,
soon after it has been poured.
Using the nailer on hardened concrete may result in
bent nails and nails being insufficiently driven in.
Use the single shot setting to improve the finish after
the nails have been driven in.
[Selecting hardened nails for use with concrete]
Select nails with a concrete intrusion depth of between
10 to 15 mm.
Nail Length
32 mm
45 mm
50 mm
57 mm
65 mm
Material Thickness
Approximately
10 to 35 mm
The external material
and steel plating is
deformed.