Operating Tips - Bosch IWHT180 Operating And Safety Instructions Manual

2610051968_IWHT180 HTH181 HTH182 1/15/19 10:20 AM Page 11
INSTALLING FASTENERS
To fasten: Start the fastener by hand on to or
in to its threaded counter part (E.G. nut on to
bolt, bolt in to nut or threaded hole).
Next, with the proper impact socket securely
mounted to the wrench, slide the impact
socket on to the nut or bolt head . Hold the
tool securely with both hands and squeeze
the trigger switch. The impact socket will turn
the fastener and impacting will begin once the
fastener encounters resistance. See the
following chart to estimate the amount of
impact time required to obtain a desired
torque.
To loosen: With the proper impact socket
securely mounted to the wrench, slide the
impact socket on to the bolt head. (be sure
the rotational direction is "reverse").
Hold the tool securely with both hands and
squeeze the trigger switch. The tool will start
to impact immediately. Once the fastener has
"broken loose" it will start to unthread. Be
careful that you do not allow a fastener to
spin freely once it is no longer engaged with
the other threaded part as it may be thrown
out of the socket.
TIGHTENING TORQUE
The tightening torque depends on the duration
of the impacting/tightening action. The largest
tightening torque is achieved after approx. 6 to
10 Sec. impacting/tightening action.
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.
Press the battery pack release button again
and slide the battery pack completely out of
tool housing (Fig. 6).
Operating Instructions

Operating Tips

INSERTING AND RELEASING BATTERY PACK
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.
COLD WEATHER USE (32°F)
Due to the lubrication used in the impacting
mechanism, the tool should be run for three
minutes at no load prior to actual usage. This
will warm the lubricant and provide better
performance.
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FIG. 6