Cutting Operation - Hitachi C 12LSH Technical Data And Service Manual

8-7. Cutting Operation

(1) Cutting efficiency will be reduced if a dull saw blade is used,
if an excessively long extension cord is used, or if the wire
gauge of the extension cord is too small. (For details, refer
to the Instruction Manual "USE PROPER EXTENSION
CORD.") This is particularly important when cutting
materials with dimensions which are at or near the
maximum capacity for the machine.
(2) The customer should be advised to thoroughly inspect the
workpiece to ensure that there are no metallic objects (nails
in particular), sand, or other foreign matter in or on the
workpiece. Contacting such foreign matter will not only
shorten the service life of the saw blade, but could cause
serious accident. Should the saw blade tips be broken off,
the tips may fly toward the operator.
(3) Press cutting ( in Fig. 36)
3
The Models C 12LSH/C 12RSH can be used for press
cutting of workpieces up to 107 mm (4-3/16") square in a
single operation by simply pushing the saw blade section
downward in the same manner as the Model C 12FSA.
Slide hinge (A) to the end of holder (A) and tighten slide
securing knob (A) and slide securing knob (B) securely.
(4) Slide cutting ( 1 to
Slide cutting procedures and precautions are described below.
Loosen slide securing knob (A).
1
Grip the handle and pull the saw blade section in the arrow direction (toward the operator).
2
3 Push the handle downward and cut the workpiece (press cutting).
CAUTION: If the handle is pushed down forcibly and excessively fast, it could cause the saw blade
vibration and partial sliding which would leave unwanted cutting marks on the workpiece.
Instruct the customer to slowly and carefully press down the handle.
While pressing down on the handle, slide the saw blade section in the arrow direction and cut the workpiece.
4
CAUTION: Interrupting the cutting operation part way through the material or sliding the saw blade
section in a jerky manner will produce unwanted cutting marks similar to those described
in above. As a guide, instruct the customer to cut a workpiece of 30 mm (1-3/16") high
3
and 240 mm (9-7/16") wide in 10 to 15 seconds.
Carefully instruct the customer never, ever to perform slide cutting in the direction toward
the operator (reverse direction of
saw blade could ride up over the workpiece and cause the saw blade section to kick upward
unexpectedly, causing possible serious injury.
5 in Fig. 36)
Holder (A)
Slide pipe
Slide securing
knob (B)
4 above). Such operation is extremely hazardous, as the
--- 27 ---
Slide securing
knob (A)
Saw
blade
Workpiece
Hinge
Fence
Fig. 36