16
51086C
17
V_SC_51086C_202105
0-25%
25-50%
50-75%
75-100%
LED display
Remaining battery
8. Operation
The proper tightening torque may vary depending
on the type or size of screw/bolt and the material of
workpiece to be fastened.
Hold the tool and place the tip of bit on the head of
screw. Apply a forward pressure to the tool to make
the screwdriver bit not slip off the screw, and start the
tool to begin the operation.
1)
The longer the impact lasts, the greater the
torque is. The maximum value is achieved at
about 6-10 s.
2) The higher the speed is, the greater the torque
is.
3) The harder the workpiece to be fastened is, the
greater the torque is.
4) Be sure to tighten the small screw slowly for a
short time. Otherwise the screw will be damaged.
Note:
1)
Use a screwdriver bit that fits the screw /bolt
head.
2) When tightening the screw, it is best to pre-drill
a pilot hole.
3) When tightening the M8 or smaller screw, select
the appropriate impact force and take care to
adjust the pressure applied to the switch trigger
to avoid damage to the screw.
4) Hold the tool and align it with the screw.
5) If the impact force for fastening the screw is
too strong or the fastening time is too long, the
screw or screwdriver bit tip may be subjected
to excessive pulling, squeezing, pressure and
even be damaged. Be sure to perform a test
to determine the proper tightening time of the
screw before starting the job.
helps to avoid the accidental activation of the hand
drill. Lock the machine by adjusting the reversing yoke
(2) to the center position.
4. Rotation reversing (see Figure C)
Forward: Push the side of reversing yoke (3) marked
with “
" to the end (left side) for drilling a
hole and driving the screw. Reverse: Push the side of
reversing yoke marked with “
" to the end (right
side) for releasing or unscrewing the screw.
WARNING
The rotating speed can only be changed after the
machine is completely still.
5. Installation or removal of screwdriver bit
(see Figure D)
Caution: When installing or removing the bit, be sure
to confirm that the machine has been turned off and
that the battery pack has been removed.
The machine is designed with a quick-loading chuck
system;
When installing the screwdriver bit, pull the sleeve
forward and insert the screwdriver bit into the chuck.
Loosen the sleeve to fix the screwdriver bit.
When removing the screwdriver bit, pull the sleeve
forward and pull the bit out, and then release the
sleeve to reset it.
WARNING
Before starting the machine, make sure that the
screwdriver bit is fully fixed by the chuck.
6. Work light
Machine is equipped with the work light: when the
switch is pressed, the light will come on; when it is
released, light will go out.
7. Battery level display (Figure E)
When the machine switch is pressed, the battery
indicator will come on. The remaining capacity of
battery pack may be determined according to the
following table, and when the switch is released, the
indicator will go out.
Tightening torque is affected by many factors as
described below. After tightening, be sure to confirm
the torque with the torque wrench.
1)
When the battery pack is about to run out
completely, the voltage will drop and the
tightening torque will also decrease.
2) The improperly sized screwdriver bit or sleeve
screwdriver bit may reduce the tightening
torque.
3) Bolt
Even if the torque coefficient and the bolt level are
the same, the tightening torque is different because
of the different diameters.
Even if the diameter of bolt is the same, the required
tightening torque is different depending on its toque
coefficient and its length.
4) The way the tool is held or the material on the
bolt will also affect the torque.
5) Operating at low speed will also reduce the
tightening torque.
WARNING
For the short screwdriver bit, use a magnetic
connecting rod (not included). When tightening the
screw, apply a little soap or other lubricant to the
thread to facilitate the operation.
QUESTION AND ANSWER:
1. Why does the machine not operate after the
switch is pressed?
A reversing yoke is located on the upper part of
switch. It is locked. Turn it to the position where the
rotation is in need, and then press the button to
rotate the machine.
2. Why does the hand drill stop when the screw has
not been tightened?
The machine has low-voltage protection. When the
level of battery pack is too low, the machine will not
work. Please confirm the level of battery pack.
The machine has temperature protection. When
the battery is working at full load for a long time,
the battery pack will overheat and the temperature
protection system will start to stop the machine.
Cool the machine to normal temperature before
resumption.
3. Why is the service life of same kind of battery pack
is different?
If a battery pack is left unused for a long time, its
service life may be shortened. This is the matter
of charging frequency. Repeated charging and
application may improve the situation. In case of
heavy work, the battery pack will run out soon. Do not
charge in a temperature below 0 °C or above 35 °C.
Otherwise, the performance of battery pack will be
affected.
MAINTENANCE
Be sure to pull off the plug before repairing or
replacing the machine.
The electric tool does not require additional
lubrication or other maintenance. Do not wash the
electric tool with the water or chemical cleaner. Wipe
it off with a dry cloth. Tool shall be stored under the
dry conditions and kept clean at the vent of motor. Try
not to use it in a dusty environment.
To prolong the service life of battery pack:
1)
Store the battery pack below 26 °C after
charging it to 30%-50%.
2) Charge the battery pack fully once in less than 6
months.
