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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 where no power source is available,
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 14DMR 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. The
motor must not be locked during operation.
(2) Avoid continuous heavy-duty operation.
Cutting a thick workpiece with strong pressure can put a heavy load on the motor. If such an operation is
performed continuously, the temperature of the motor and the housing will rise and burning of the motor will
result. 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 is likely to cause mechanical failure.
Instruct your customer never to cover or block the vent hole.
(4) Safety switch lever
The Model C 14DMR is equipped with an 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 and 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 14DMR is
1,400 mAh, the actual capacity may vary within 10 % than that value depending 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.
Switch lock
*(It works
as switch
lock alone
if the
machine is
not
equipped
with light.)
--- 7 ---
Switch trigger
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