Hitachi NV 90HMC Handling Instructions Manual page 41

[Selecting Nail Length]
Material Thickness
14 to 35 mm
15 to 45 mm
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 suffi ciently 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 insuffi ciently driven in.
[Selecting hardened nails for use with concrete]
Select nails with a concrete intrusion depth of between
10 to 15 mm.
Reference Examples
Wood Length of Nails
Thickness to be Used
30 mm
35 mm
45 mm
50 mm
Nail Length
45 mm
50 mm
Material Thickness
Approximately
10 to 35 mm
The external material
and steel plating is
deformed.
Concrete
Intrusion Depth
45 mm Approx. 15 mm
50 mm Approx. 15 mm
57 mm Approx. 12 mm
65 mm Approx. 15 mm
Length of Nails
to be Used
NOTE
The nails will not be driven in suffi ciently if the concrete
intrusion depth is deeper than 15 mm.
5. Adjusting the nail-driving depth
CAUTION
When making adjustments, be sure remove your fi nger
from the trigger. When making adjustments, be sure
that the nail outlet is not facing downward and that
body parts or other people are not in the path of the nail
outlet.
○ Adjusting the adjuster (Fig. 13)
Carry out test driving. If the nails are too deep, turn the
adjuster to the shallow side (
If the nail depth is too shallow, turn the adjuster to the
deep side ( mark) (See Fig. 13, 14).
Depth is changed 1 mm with each rotation of the
adjuster.
NOTE
○ When adjusting the adjuster, it does not rotate more
than 3 mm from the deepest point where a nail goes
down. Do not rotate the adjuster by force beyond that
point.
○ The nail-driving depth can also be adjusted by changing
the air pressure used. Carry this out together with
movement of the adjuster. Using a high air pressure that
does not match the nail-driving resistance will shorten
the life of this nailer.
6. Cutting off the sheet
Tear off the output sheet in the direction of the arrow
when using the sheet collated nails (Fig. 15).
7. Using the blow nozzle
CAUTION
○ Be sure to release your fi nger from the trigger before
using the blow nozzle.
○ Do not point the air outlet at a person.
○ Do not use the blow nozzle with the push lever left fi t.
This Nailer has a blow nozzle that blows out wood shavings
which occur during work.
Press the knob with your thumb to use the blow nozzle (See
Fig. 16).
NOTE
○ When the blow nozzle is used for a long time, the nailing
force may degrade temporarily. In this case, allows the
air supply pressure to stabilize before starting work.
○ Oil in the body or drained water from the compressor can
sometimes spout out of the air outlet. It is recommended
that you once conduct a test before use and see if
such phenomenon happens at an environment where
spouted oil will cause any inconvenience.
8. How to use nosecap
CAUTION
Remove the hose from the nailer and release the
compressed air before installing or removing the
nosecap to prevent accidental nail ejection.
○ Attach the nose cap on the tip of the push lever when
you wish to protect the surface of wood, etc., from
scratches.
English
Wood Thickness
Concrete Intrusion
Depth 10 to 15 mm
mark).
41