Selection Of Blades - Hitachi Koki CR 18DMR Instrucciones De Manejo

English
Do not remove the front cover.
Be sure to hold the body from the top of the front
cover (refer to Fig. 6).
During use, press the base against the material
while cutting.
Vibration can damage the saw blade if the base is
not pressed firmly against the workpiece.
Furthermore, a tip of the saw blade can sometimes
contact the inner wall of the pipe, damaging the
saw blade.
Select a saw blade of the most appropriate length.
Ideally, the length protruding from the base of the
saw blade after subtracting the stroke quantity should
be larger than the material (see Fig. 19 and
Fig. 21).
If you cut a large pipe, large block of wood, etc.,
that exceeds the cutting capacity of a blade; there
is a risk that the blade may contact with the inner
wall of the pipe, wood, etc., resulting in damage
(Fig. 20, Fig. 22).
1. Switch operation
(1) Lock-off button
The tool is equipped with a lock-off button. To
activate the trigger lock, move the button to the
right position. Move the button to the left to operate
the tool (Fig. 18).
Always lock the switch when carrying or storing the
tool eliminate unintentional starting.
(2) Trigger switch
This tool is equipped with a variable speed controlled
trigger switch. The tool can be turned "ON" or "OFF"
by squeezing or releasing the trigger. The blade
plunger stroke rate can be adjusted from the
minimum to maximum nameplate stroke rate by
the pressure you apply to the trigger. Apply more
pressure to increase the speed and release pressure
to decrease speed.
2. Cutting metallic materials
CAUTION
Press the base firmly against the workpiece.
Never apply any unreasonable force to the saw
blade when cutting. Doing so can easily break the
blade.
The motor can be locked sometimes, depending on
the combination of the material to be cut and the
blade. Whenever the motor gets locked, switch it
off immediately.
(1) Fasten a workpiece firmly before operation (Fig. 23).
(2) When cutting metallic materials, use proper machine
oil (turbine oil, etc.). When not using liquid machine
oil, apply grease over the workpiece.
CAUTION
The service life of the saw blade will be drastically
shortened if you don't use machine oil.
3. Cutting lumber
When cutting lumber, make sure that the workpiece
is fastened firmly before beginning (Fig. 24).
CAUTION
Never apply any unreasonable force to the saw
blade when cutting. Also remember to press the
base against the lumber firmly.
4. Sawing curved lines
We recommend that you use the BI-METAL blade
mentioned in Table 4 (Page 14) for the saw blade
since it is tough and hardly breaks.
13
CAUTION
Delay the feed speed when cutting the material into
small circular arcs. An unreasonably fast feed may
break the blade.
5. Plunge cutting
With this tool, you can perform plunge cutting on
plywood panels and thin board materials. You can
carry out pocket cutting quite easily with the saw
blade installed in reverse as illustrated in Fig. 26,
Fig. 28, and Fig. 30. Use the saw blade that is as
short and thick as possible. We recommend for this
purpose that you use BI-METAL Blade No. 132
mentioned in Page 14, Table 4. Be sure to use
caution during the cutting operation and observe
the following procedures.
(1) Press the lower part (or the upper part) of the base
against the material. Pull the switch trigger while
keeping the tip of the saw blade apart from the
material (Fig. 25, Fig. 26).
(2) Raise the handle slowly and cut in with the saw
blade little by little (Fig. 27, Fig. 28).
(3) Hold the body firmly until the saw blade completely
cuts into the material (Fig. 29, Fig. 30).
CAUTION
Avoid plunge cutting for metallic materials. This can
easily damage the blade.
Never pull the switch trigger while the tip of the
saw blade is pressed against the material. If you
do so, the blade can easily be damaged when it
collides with the material.
Make absolutely sure that you cut slowly while
holding the body firmly. If you apply any
unreasonable force to the saw blade during the
cutting operation, the blade can easily be damaged.
NOTE
The use of the battery EB1826HL and EB1830HL in
a cold condition (below 0 degree Centigrade) can
sometimes result in the weakened cutting torque
and reduced amount of work. This, however, is a
temporary phenomenon, and returns to normal when
the battery warms up.

SELECTION OF BLADES

To ensure maximum operating efficiency and results,
it is very important to select the appropriate blade best
suited to the type and thickness of the material to be
cut.
NOTE
Dimensions of the workpiece mentioned in the table
represent the dimensions when the mounting
position of the base is set nearest to the body of
the Cordless Reciprocating Saw. Caution must be
exercised since dimensions of the workpiece will
become smaller if the base is mounted far away
from the body of the Cordless Reciprocating Saw.
1. Selection of HCS blades
The blade number of HCS blades in Table 3 is
engraved in the vicinity of the mounting position
of each blade. Select appropriate blades by referring
to Tables 3 and 5 below.