--- 11 ---
100
Rotation speed
60 5
(%)
12 8
0
2 0.5
7 0.5
Amount trigger switch is depressed (mm)
9 0.5
(6) 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 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. The Model DN 12DY is equipped with the locking device to
prevent loosening of the keyless chuck. The sleeve makes noise when tightening or loosening. This is
because of the locking device and there is no problem.
(7) Avoid continuous use.
Although the Model DN 12DY 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 Model DN 12DY and take a pause about 15 minutes after a single
charge operation as a guide.
B. Suggestions and precautions for the efficient use of the charger and storage batteries
If any of the storage batteries Types EB 1212S, EB 1220BL and EB 1230HL is exposed to direct sunlight for an
extended period or if the temperature of the battery is high immediately after it has been used in the tool, the pilot
lamp (red) may not be turned on when the battery is connected to the charger. Chargeable temperature ranges of
each type of battery are specified as follows.
Types EB 1212S and EB 1220BL: from -5˚C to 60˚C (from 23˚F to 140˚F)
Type EB 1230HL: from 0˚C to 45˚C (from 32˚F to 113˚F)
In such a case, the customer should be advised to place the battery in a shaded area with a good airflow, and
allows sufficient cooling before recharging. This phenomenon is common to all existing batteries that employ a
thermostat. The cooling time required before charging varies from a few minutes to about 30 minutes, depending
on the load, duration of use, and ambient temperature.
9. REFERENCE MATERIALS
9-1. Speed Control Mechanism
Spindle rotation speed of the Model DN 12DY can be
controlled by simply varying the amount by which the
trigger switch is depressed. The relationship between the
amount the trigger switch is depressed (in millimeters) and
the rotation speed is illustrated in Fig. 2.
Note: The gradient and values illustrated in Fig. 2 are
intended for reference only, and will vary slightly
due to differences in the discharge condition of the
battery, the ambient temperature, and individual
speed-control element accuracy.
Fig. 2
