18
9. Operation
Be sure to fully lock the battery pack as it may
accidentally fall out of the tool and cause injury
to yourself or others. Hold the tool firmly and
place the sleeve above the bolt or nut, turn the
machine on and tighten it properly.
The tightening torque may vary depending on
the type or size of bolt and the material of
workpiece to be fastened. Generally, the longer
the tightening time is, the larger the tightening
torque is.
Note:
Align the tool straightly with the bolt or nut.
Excessive tightening torque may damage the
bolt nut or sleeve. Before the operation, be
sure to conduct the test run to determine the
proper tightening time for the bolt or nut.
If the tool keeps operating until the battery
pack is exhausted, the operation shall stop for
15min, and then continue the operation with
the charged battery pack. Tightening torque
depends on the various factors 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) Sleeve
Incorrectly sized sleeve will result in the
decrease of tightening torque
Damaged sleeve (wear of hex end or
rectangular end) will 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) Universal joint or extension rod will
reduce the tightening force of the impact
sleeve wrench to some extent, which can be
compensated by the extension of tightening
time.
5) The way the tool is held or the material on
the bolt will also affect the torque.
6) Operating at low speed will also reduce the
tightening torque.
QUESTION AND ANSWER:
1. Why does the machine not operate after the
switch is pressed?
The reversing yoke on the upper part of switch
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 machine stop when it is not
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
51073C
Summary of Contents for 51073C
Page 1: ...18VJ 220N m Li Ion Brushless Impact Wrench 220N m 51073C EN OPERATION INSTRUCTION...
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Page 5: ...V_SC_51073C_202104 5 Pb Hg Cd Cr VI PBB PBDE SJ T11364 GB T 26572 GB T 26572 RoHS 2...
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