Bosch 24618 Consignes De Fonctionnement/Sécurité page 11

BM 2610034434 09-15_24618 25618 IWH181 9/8/15 9:27 AM Page 11
INSERTING AND RELEASING
BATTERy PACK
Set Forward/Reversing lever to the center (off
position). Slide charged battery pack into the
housing until the battery pack locks into
position (Fig. 6).
Your tool is equipped with a secondary locking
latch to prevent the battery pack from
completely falling out of the handle, should it
become loose due to vibration.
To remove the battery pack, press the battery
pack release button and slide the battery pack
forward.
You will extend the life of your bits and do
neater work if you always put the bit in
contact with the work before pulling the
trigger. During the oper a tion, hold the tool
firmly and exert light, steady pressure. Too
much pressure at low speed will stall the tool.
Too little pressure will keep the bit from
cutting and cause excess friction by sliding
over the surface. This can be damaging to
both tool and bit.
DRIVING WITH VARIABLE SPEED
The technique is to start slowly, increasing
the speed as the screw runs down. Set the
screw snug ly by slowing to a stop. Prior to
driving screws, pilot and clearance holes
should be drilled.
Always hold the machine straight on the bolt
to be tightened.
The best method to determine the right
impacting/tightening duration is by means of
a trial. For small screws, the right
impacting/tightening duration can be reached
in less then 0.5 Sec. Therefore, work with
low RPM and switch the machine off
immediately when the screw is tight and the
impacting sound can be heard.
For screwing larger, longer wood screws into
hard material, pre-drilling is the best method.
TIGHTENING TORqUE
(Models 24618 & IWH181 only)
The tightening torque depends on the
duration of the impacting/tightening action.
Press the battery pack release button again
and slide the battery pack completely out of
tool housing (Fig. 6).
Operating Tips
The largest tightening torque is achieved
after approx. 6 to 10 Sec. impacting/
tightening action.
The torque build-up depends on the
following factors:
• Hardness of the bolts/nuts.
• Type of washer (disk washer, spring
washer, seal).
• Hardness of the material to be joined.
• Lubricating effect at the surfaces of the
junction.
This leads to the following application cases:
Hard case: The joining of metal to metal with
a disk washer. The maximum torque is
reached after a relative short impacting/
tightening action.
Medium case: The joining of metal to metal
where spring ring washer, disk spring
washer, stud bolts or bolts/nuts with conical
seats are used.
Soft case: The joining of e.g. metal to wood
or insulation material.
For middle or soft joining cases, the
maximum tightening torque is less as for
hard cases. Therefore, a longer impacting/
tightening action is necessary to arrive at the
maximum tightening torque.
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FIG. 6