Adjusting The Saw Prior To Use; Cutting Procedures; Mounting And Dismounting The Saw Blade; Maintenance And Inspection - Hitachi C 7BMR Instrucciones De Manejo

English
CAUTION
To avoid possible accident, always ensure that the
portion of lumber remaining after cutting is se-
curely anchored or held in position.

ADJUSTING THE SAW PRIOR TO USE

1. Adjusting the cutting depth
To adjust cutting depth, loosen the lever (A) and,
while holding the base with one hand, move the
main body up and down to obtain the prescribed
cutting depth. After adjusting to the prescribed cutting
depth, tighten the lever (A) securely (Fig. 2).
CAUTION
Should this lever (A) remain loosened, it will create
a very hazardous situation. Always thoroughly clamp
it.
2. Adjusting the angle of inclination
By loosening the lever (A) at the scale, the saw
blade can be inclined up to maximum angle of 45°
against the base.
After adjusting to the prescribed angle of inclination,
tighten the lever (A) securely.
CAUTION
Should this lever (A) remain loosened, it will create
a very hazardous situation. Always thoroughly clamp
it.
3. Regulating the guide
The cutting position can be regulated by moving the
guide to the left or right after loosening its wing bolt.
The guide can be mounted on either the left or the
right side (Fig. 4).
4. Using the dust collector
To use the vacuum cleaner to gather up saw dust,
attach the suction hose to the dust collector which
is attached to the main unit by M4 and M5 screws.
When attaching the dust collector always be sure
to change the lever to the short type at the same
time (Fig. 11).
CAUTION
Continuing to use the lever that was attached to
the main unit prior to shipping from the factory will
cause it to bind on the dust collector and will
interfere with the lower guard operation.

CUTTING PROCEDURES

1. Place the saw body (base) on the lumber, and align
the intended line of cut with the saw blade, using
the notch at the front of the base. This relationship
of base to lumber should remain unchanged
regardless of the inclination of the base (Fig. 5).
2. Turn ON the switch before the saw blade contacts the
lumber. The switch is turned ON when the trigger is
squeezed, and turned OFF when the trigger is released.
3. Moving the saw straight at a constant speed will
produce optimum cutting.
CAUTIONS
Prior to cutting operation, make sure the material you
are going to cut. If the material to be cut is expected to
generate harmful / toxic dusts, make sure the dust bag or
appropriate dust extraction system is connected with
dust outlet tightly.
Wear the dust mask additionally, if available.
9
Before starting to saw, confirm that the saw blade
has attained full-speed revolution.
Should the saw blade stop or make an abnormal
noise while operating, promptly turn OFF the switch.
Always take care in preventing the power cord from
coming near to the revolving saw blade.
Using the circular saw with the saw blade facing
upwards or sideways is very hazardous. Such
uncommon applications should be avoided.
When cutting materials, always wear protective glasses.
When finished with a job, pull out the plug from
the receptacle.
MOUNTING AND DISMOUNTING THE SAW
BLADE
CAUTION
To avoid serious accident, ensure the switch is in the
OFF position, and the power source is disconnected.
1. Dismounting the saw blade
(1) Set the cutting volume at maximum, and place the
Circular Saw as shown in Fig. 6.
(2) Depress the lock lever, lock the spindle, and remove
the hexagonal-flange bolt with the box wrench.
(3) While holding the lower guard lever to keep the
lower guard fully retracted into the saw cover,
remove the saw blade.
2. Mounting the Saw Blade
(1) Thoroughly remove any sawdust which has accu-
mulated on the spindle, bolt and washers.
(2) As shown in Fig. 7, the side of Washer (A) with
a projected center the same diameter as the inner
diameter of the saw blade and the concave side
of Washer (B) must be fitted to the saw blade sides.
* Washer (A) is supplied for 2 types of saw blades
with the hole diameters of 20 mm and 30 mm.
(When buying the Circular Saw, one type of washer
(A) is supplied.)
In case the hole diameter of your saw blade does
not correspond to that of washer (A), please contact
the shop where you purchased the Circular Saw.
(3) To assure proper rotation direction of the saw blade,
the arrow direction on the saw blade must coincide
with the arrow direction on the saw cover.
(4) Using the fingers, tighten the hexagonal-flange bolt
retaining the saw blade as much as possible. Then
depress the lock lever, lock the spindle, and thor-
oughly tighten the bolt.
CAUTION
After having attached the saw blade, reconfirm that the
lock lever is firmly secured in the prescribed position.

MAINTENANCE AND INSPECTION

1. Inspecting the saw blade
Since use of a dull saw blade will degrade efficiency
and cause possible motor malfunction, sharpen or
replace the saw blade as soon as abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Fail-
ure to do so could result in serious hazard.