Inherent Drawbacks Of Cordless Circular Saws Requiring Particular Attention During Sales Promotion - Hitachi C 18DL Technical Data And Service Manual

8-3. Inherent Drawbacks of Cordless Circular Saws Requiring Particular Attention During Sales Promotion

The cordless circular saw offers many advantages; it can be used in places without power source, the absence of
a cord allows easy use, etc. However, any cordless electric power tool has certain inherent drawbacks.
Salespersons must be thoroughly familiar with these drawbacks in order to properly advise the customer in the
most efficient use of the tool.
(1) Do not overload the motor.
As the Model C 18DL is a battery-powered cordless circular saw, the motor's output and torque are less than
those of ordinary AC-powered circular saws. Do not twist or thrust the main body during cutting. Otherwise,
the motor becomes locked and will cause burning of the motor or deterioration of the battery.
Do not lock the motor during operation.
(2) Avoid continuous heavy-duty operation.
Cutting a thick workpiece with strong pressure puts a heavy load on the motor. If such an operation is
performed continuously, the temperature of the motor and the housing will rise and the motor will burn. Do not
perform heavy-duty operations continuously.
(3) Do not place any foreign substance in the vent hole of the main body.
The outer body of this unit is provided with a vent hole for greater cooling efficiency. Since the motor has a
built-in cooling fan, a foreign substance inserted into the vent hole causes mechanical failure. Instruct your
customer never to cover or block the vent hole.
(4) Safety switch lever
The Model C 18DL is equipped with a safety switch lever at
the side of the handle for safety. Users who are familiar with
AC-powered circular saws might feel a little awkwardness
in handling the safety switch lever. However, this lever is
equipped for user's safety. The salespersons must
instruct the users not to insert any foreign substance such
as a chip of wood in the safety switch lever to ensure the
correct functioning of the safety switch lever. Refer to the
Handling Instructions "Operation of Switch" for operation of the
safety switch lever.
(5) Variation in amount of work possible per charge.
Although the nominal chargeable capacity of the storage batteries used with the Model C 18DL is 3,000 mAh,
the actual capacity may vary within 10 %. It depends on the ambient temperatures during use and charging,
and the number of times the batteries have been recharged. It should be noted that other factors which may
have a bearing on the amount of work possible per charge are the working conditions (ambient temperature,
type and moisture content of the workpiece, sharpness of the saw blade, etc.) and operational skill of the user.
Safety switch lever
(also used as a
light switch)
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Switch trigger