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(6) Precautions in the use of HSS Drill Bits
For example, although the Model DS 18DFL is designed for drilling capacities of 36 mm (1-27/64") in wood,
and 13 mm (1/2") in aluminum and mild steel, this capability is not as efficient as conventional electric power
tools. In particular, when drilling through aluminum material with a 13 mm (1/2") drill bit, the drill tends to
become locked when the drill bit penetrates through the material. For this reason, the customer should be
cautioned to reduce the thrust on the main body of the drill when drilling completely through the material to
avoid locking the tool. Repeated locking of the drill causes excessive current flow from the batteries which not
only decreases the amount of work possible per charge, but could also result in burning of the motor and/or
rapid deterioration of the battery.
(7) Securely tighten the sleeve of the keyless chuck.
The keyless chuck may slip during operation if the shape of the drill bit shank is cylindrical or depending on the
surface conditions, materials, etc. Please instruct the customers to retighten the keyless chuck more securely
if the keyless chuck slips during operation. The holding force of the keyless chuck is increased as the
tightening force of the keyless chuck is increased.
(8) Avoid continuous use.
Although the Models DS 18DFL and DS 14DFL can bear continuous operation under certain conditions,
operating conditions are different depending on material of workpiece and sharpness of the drill bit in use.
Please instruct the customers to avoid continuous use of the Models DS 18DFL and DS 14DFL and take a
pause about 15 minutes after a single charge operation as a guide.