Attaching And Removing Blades; Throwing Away The Cutting Dust; Maintenance And Inspection - Hitachi CD 7SA Handling Instructions Manual

necessary to turn the metal cutting saw off in the
middle of cutting a work piece, pull the chip saw
back with the blade still turning and after it is no
longer in contact with the work piece material, then
turn the power switch off.
Do not to try to cut the same work piece two times
in the same location.
1. Place the main body (base) on the surface of the
work piece and align the slit on the forward edge
of the base with the sighting line. The arrow mark
on the projection in the dust cover (A) and the slit
in the base will be aligned and can be used for
positioning the metal cutting saw. (See Fig. 3)
If the sighting line is hard to see when working in
a dark place etc., turn on the LED light and align
the sighting line with the slit in the forward edge
of the base. (See Fig. 4)
2. Without allowing the blade to touch the material,
turn on the power switch. When the blade has
attained its maximum speed, push the metal cutting
saw slowly forward and maintain the same speed
until the cut is completed.
To keep the cut clean, push the saw forward at the
same speed.
3. The slit in the base indicats the position of the edge
of the blade at further end of the cut. This is useful
when cutting the work piece to a mid-way point.
(See Fig. 5)

ATTACHING AND REMOVING BLADES

CAUTION:
Always turn the power switch off first and remove
the plug from the socket.
Use the box wrench that is supplied with the metal
cutting saw. Do not use other tools as this may
result in over-tightening or in sufficient tightening
of the wing bolt that holds the blade in place
causing accidents.
1. Removing the blade
(1) Loosen the two special bolts and remove dust
covers (A) and (B). (See Fig. 6).
(2) Adjust the cutting depth of the blade to the minimum
position and place the tipped saw cutter on a flat,
stable surface. (See Fig. 7).
(3) While pushing in the lock lever, slowly unscrew the
bolt using the box wrench provided.
(4) Holding the spindle in position, turn the box wrench
counter-clockwise and remove the bolt and the
washer (B).
(5) Remove the tipped saw blade in direction (A).
2. Attaching the blade
CAUTION:
After using the tipped saw blade, dust covers (A)
and (B) may become hot. Take caution when
handling.
Do not forget to use the distance piece.
Before plugging in the metal cutting saw, be sure
to check to see whether the lock lever has been
returned to its original position and that the tipped
saw blade can rotate smoothly.
(1) Follow the blade removal routine in reverse.
(2) Remove any cutting dust that may have adhered
to the spindle or the washers.
(3) When a chip saw blade with a 20mm diameter is
to be attached, place washer (A) with the deep
recessed portion turned toward the blade side.
When the hole diameter is 30mm, place the side
of washer (A) with the more shallower recessed
portion toward the blade.
For both cases, the (B) washer is used with its
recessed portion facing toward the blade.
Fig. 8)
(4) Make sure that the arrow mark on the side of the
blade is aiming the direction as the direction of
arrow on the gear cover. (See Fig. 9)
(5) Be sure to tighten the bolt sufficiently.

THROWING AWAY THE CUTTING DUST

CAUTION:
To prevent possible accidents, always turn the metal
cutting saw off and unplug before attempting to
empty out the cutting dust.
Cutting dust from metal materials may be very hot.
Do not touch the cutting dust or dust covers (A)
or (B) with bare hands.
Be careful when handling dust covers (A) and (B)
as not to bend them. If they become bent, cutting
dust may spill out.
1. Throwing away the cutting dust
If too much cutting dust accumulates inside dust
covers (A) and (B), the performance of dust collector
may decrease. Be sure to empty out the cutting
dust before the dust receptacle becomes full.
(1) 1 Hold the (resin) knob and push the latch down
to disengage the lock. (See Fig. 10 A)
2 Pull dust cover (B) back to remove. (See Fig. 10
B, C)
3 Remove dust cover (B) and throw away the
cutting dust. (See Fig. 11)
(2) Remove any cutting dust that has adhered to dust
covers (A) and (B) and wipe them with a rag, etc.
(3) 1 Insert the dust cover (B) hook into the hole for
inserting the hook in dust cover (A). (See Fig.
12 A)
2 Push the latch down. (See Fig. 12 B)
3 Push dust cover (B) forward to replace. (See Fig.
12 C)
After replacing the dust cover, check that the lock
is securely engaged.
When the two special bolts are loosened, dust
covers (A) and (B) can be removed with the cutting
dust still inside. (See Fig. 13)
The cutting dust can then be thrown away without
spilling it.

MAINTENANCE AND INSPECTION

1. Inspecting the carbide tipped saw blade
Since use of a dull saw blade will cause motor
malfunctioning and degraded efficiently, replace with
a new one without delay when 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.
English
(See
12