Bosch IWHT180, HTH181, HTH182 User Manual

1-877-BOSCH99 (1-877-267-2499) www.boschtools.com

Operating/Safety Instructions
Consignes d’utilisation/de sécurité
Instrucciones de funcionamiento y seguridad

IMPORTANT

Read Before Using

●

IMPORTANT

Lire avant usage

●

IMPORTANTE

Leer antes de usar

For English Version

See page 2

●

Version française

Voir page 13

●

Versión en español

Ver la página 24

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IWHT180

HTH181

HTH182

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▶ Work area safety

Ke ep work area clean and well lit.

Cluttered or dark areas invite accidents.

Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power

tools create sparks which may ignite the
dust or fumes.

Keep children and bystanders away while
operating a power tool. Distractions can

cause you to lose control.

▶ Electrical safety

Power tool plugs must match the outlet.
Never modify the plug in any way. Do not
use any a dapter plugs with earthed
(grounded) power tools. Unmodified

plugs and matching outlets will reduce
risk of electric shock.

Avoid body contact with earthed or
grounded su r faces, such as pipes,
radiators, ranges and refrigerators. There

is an increased risk of electric shock if
your body is earthed or grounded.

Do not expose power tools to rain or wet
conditions. Water entering a power tool

will increase the risk of electric shock.

Do not abuse the cord. Never use the
cord for carrying, pulling or unplugging the
power tool. Keep cord away from heat,
oil, sharp edges or moving parts. Damaged

or entangled cords increase the risk of
electric shock.

When operating a power tool outdoors,
us e an exten sion cord suitable for
outdoor use. Use of a cord suitable for

outdoor use reduces the risk of electric
shock.

If operating a power tool in a damp
location is unavoidable, use a Ground
Fa u lt Circuit In terrupter ( G FCI)
protected supply. Use of an GFCI reduces

the risk of electric shock.

▶ Personal safety

Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use a power tool
while you are tired or under the influence

Read all safety warnings, instructions, illustrations and specifications
provided with this power tool. Failure to follow all instructions listed

below may result in electric shock, fire and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE

The term “power tool” in the warnings refers to your mains-operated (corded) power
tool or battery-operated (cordless) power tool.

General Power Tool Safety Warnings

Safety Symbols

The definitions below describe the level of severity for each signal word. Please read the

manual and pay attention to these symbols.

!

This is the safety alert symbol. It is used to alert you to
potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.

DANGER indicat es a ha zardous situation which, if not
avoided, will result in death or serious injury.

WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.

CAUTION indicates a hazardou s situ ation which, if not
avoided, could result in minor or moderate injury.

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General Power Tool Safety Warnings

of drugs, alcohol or medication. A moment
of inattention while operating power tools
may result in serious personal injury.

Use personal protective equipment.
Always wear eye protection. Protective

equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing
protection used for appropriate conditions
will reduce personal injuries.

Prevent unintentional starting. Ensure the
switch is in the off-position before
connecting to power source and / or
battery pack, picking up or carrying the
tool. Carrying power tools with your finger

on the switch or energizing power tools
that have the switch on invites accidents.

Remove any adjusting key or wrench
before turning the power tool on. A

wrench or a key left attached to a rotating
pa rt o f the power t ool may result in
personal injury.

Do not overreach. Keep proper footing
and balance at all times. This enables

be t ter control of the po wer tool in
unexpected situations.

Dr e ss proper l y. Do not wear loose
clothing or jewelry. Keep your hair,
clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair

can be caught in moving parts.

If devic es ar e prov ided for the
co n nection of dust extractio n and
collection facilities, ensure these are
connected and properly used. Use of dust

co l lection can red uce dust-re lated
hazards.

Do not let familiar ity gain ed from
fr e quent use of tools allow you to
become complacent and ignore tool
safety principles. A careless action can

cause severe injury within a fraction of a
second.

▶ Power tool use and care

Do not force the power tool. Use the
correct power tool for your application.

The correct power tool will do the job
better and safer at the rate for which it
was designed.

Do not use the power tool if the switch
does not turn it on and off. Any power

tool that cannot be controlled with the
switch is dangerous and must be repaired.

Disconnect the plug from the power
source and/or remove the battery pack, if
detachable, from the power tool before
making any adjustments, changing
accessories, or storing power tools. Such

preventive safety measures reduce the risk
of starting the power tool accidentally.

Store idle power tools out of the reach of
children and do not allow persons
unfamiliar with the power tool or these
instructions to operate the power tool.

Power tools are dangerous in the hands of
untrained users.

Maintain power tools and accessories.
Check for misalignment or binding of
moving parts, breakage of parts and any
other condition that may affect the power
tool’s operation. If damaged, have the
power tool repaired before use. Many

accidents are caused by poorly maintained
power tools.

Keep cutting tools sharp and clean.

Properly maintained cutting tools with
sharp cutting edges are less likely to bind
and are easier to control.

Use the power tool, accessories and
tool bits etc. in accordance with these
instructions, taking into account the
working conditions and the work to be
performed. Use of the power tool for

operations different from those intended
could result in a hazardous situation.

Keep handles and grasping surfaces dry,
cl ean and f ree from oil and g rease.

Slippery handles and grasping surfaces do
not allow for safe handling and control of
the tool in unexpected situations.

▶ Battery tool use and care

Recharge only wi t h the charger
specified by the manufacturer. A charger

that is suitable for one type of battery
pack may create a risk of fire when used
with another battery pack.

Use power tools only with specifically
designated battery packs. Use of any

other battery packs may create a risk of
injury and fire.

When battery pack is not in use, keep it

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Hold the power tool by insulated gripping
surfaces, when performing an operation
where the fastener may contact hidden
wiring. Fasteners contacting a “live” wire

may make exposed metal parts of the
power tool “live” and cou ld give the
operator an electric shock.

Brace the tool properly before use. This
tool produces a high output torque and
without properly bracing the tool during
operation, loss of control may o ccur
resulting in personal injury.

Use clamps or another practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand or

against your body leaves it unstable and may
lead to loss of control.

Do not drill, fasten or break into existing
walls or other blind areas where electrical
wi ring ma y exist . If th is situ atio n is

unavoidable, disconnect all fuses or circuit
breakers feeding this worksite.

Alwa y s w e ar safety g o g g l es or ey e
protection when using this tool.

Wear ear protectors when using the tool for
extended periods. Prolonged exposure to

high intensity noise can cause hearing loss.

Use thick cushioned gloves and limit the
expo sure time by takin g frequ ent rest
periods. Vibration caused by hammer-drill

action may be harmful to your hands and
arms.

Secure the material being fastened. Never
hold it in your hand or across your legs.

Unstable support can cause loss of control
and injury.

Avoid accide nt al starting. Be sur e the
forw a r d / r e v erse switch is in th e of f
position before inserting battery pack.

Carrying appliances with your finger on the
switch or inserting the battery pack into an
appl i a n c e with th e switch o n invit e s
accidents.

Remove batte ry pack befor e changing
accessories. Accidental starting may occur

because battery appliances with a battery
inserted are in the operative condition.

Be prepared for a reaction torque when
“seati ng” or removing a fa stener. Th e

screwdriver housing may tend to twist in the
oppo s i t e direct i o n of b i t rotation when
“seating” or removing a fastener depending
on the torque setting of the tool.

Do not use dull or damaged impact

Safety Rules for Cordless Impact Wrenches

General Power Tool Safety Warnings

aw ay from other metal obje cts lik e
paper clips, coins, keys, nails, screws,
or other small metal objects that can
make a connection from one terminal to
another. Shorting the battery terminals

together may cause burns or a fire.

Under abusive conditions, liquid may be
ejected from the battery, avoid contact.
If contact accidentally occurs, flush with
water. If l i q u i d contacts ey e s ,
additionally seek medical help. Liquid

eject e d from the battery may cause
irritation or burns.

Do not use a battery pack or tool that is
damaged or modified. Damaged or modified

batte r i e s may e x h i bit unpred i c t a b l e
behaviour resulting in fire, explosion or risk
of injury.

Do not expose a battery pack or tool to
fire or excessive temperature. Exposure

to fire or temperature above 265 °F may
cause explosion.

Follow all charging instructions and do
not charge the battery pack or tool
outside the temperature range specified
in the instructions. Charging improperly

or at temperatures outside the specified
range may damage th e battery and
increase the risk of fire.

▶ Service

Have your power tool serviced by a
qualified re pair p erson using only
identical replacement parts. This will

ensure that the safety of the power tool is
maintained.

Never service damaged battery packs.

Service of battery packs should only be
pe r formed by the manufac t urer or
authorized service providers.

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sockets and accessories. When installing
an accessory, insert the impact socket well
onto the output drive. Be sure the output
drive has locked onto the socket correctly.

Do not run the tool while carrying it at
your side . A sp inning bit co uld b ecome

entangled with clothing and injury may result.

Pl ace the to ol onto th e f aste ner onl y
when the sc rewdriver is s witch ed off.

Rota t i n g dr i v e r tools can slide off th e
fastener.

Do not use this tool as a dr i l l. Tool s

eq uipp ed w ith shu t-of f c lutc hes are not
designed for drilling applications. The output
drive can shut off automatically and without
warning.

Be careful when driving long screws –
there is a risk of sliding off the fastener
head depending on type of socket or bit
used. First test the run-down of a fastener

and pay attention during the screw driving
process to ensure you do not injure yourself
if th e tool bi t o r s ock et slides off o f t he
fastener.

Additional Safety Warnings

GFCI and personal protection devices like
electrician’s rubber gloves and footwear will
further enhance your personal safety.

Do not use AC only rated tools with a DC
power supply. While the tool may appear to

work, the electrical components of the AC
rated tool are likely to fail and create a hazard
to the operator.

Keep handles dry, clean and free from oil
and grease. Slippery hands cannot safely

control the power tool.

Develop a periodic maintenance schedule
for your tool . When cleaning a tool be
careful not to disassemble any portion of
th e tool since inter nal wi res ma y be
misplaced or pinched or safety guard return
sp rin gs may be imp roperly mou nte d.

Certain cleaning agents such as gasoline,
carb on tetrac hlori de, ammonia, etc . may
damage plastic parts.

Ensure the switch is in the off position
before inserting battery pack. Inserting the

battery pack into power tools that have the
switch on invites accidents.

Some dust c reated by

power sanding, sawing,
grinding, drilling, and other construction
activities contains chemicals known to
ca use canc er, bi rth def e cts or othe r
reproductive harm. Some examples of
these chemicals are:

• Lead from lead-based paints,

• Crystalline silica from bricks and cement and

other masonry products, and

• Arsen ic a nd c hromium from chemically-

treated lumber.

Yo u r ri sk f r om t hese expo s ures var i es,
depending on how often you do this type of
work . To reduce your exposur e to th ese
chemicals: work in a well ventilated area, and
work with approved safety equipment, such as
those dust masks that are specially designed
to filter out microscopic particles.

Safety Rules for Cordless Impact Wrenches

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Symbols

Important: Some of the following symbols may be used on your tool. Please study them
and learn their meaning. Proper interpretation of these symbols will allow you to operate
the tool better and safer.

Symbol Designation / Explanation

V Volts (voltage)

Ah Amp hour (measurement of battery capacity)

A Amperes (current)

Hz Hertz (frequency, cycles per second)

W Watt (power)

kg Kilograms (weight)

min Minutes (time)

s Seconds (time)

⌀

Diameter (size of drill bits, grinding wheels, etc.)

n

0

No load speed (rotational speed at no load)

n Rated speed (maximum attainable speed)

.../min

Revolutions or reciprocation per minute (revolutions, strokes, surface
speed, orbits etc. per minute)

0 Off position (zero speed, zero torque...)

1, 2, 3, ...

I, II, III,

Selector settings (speed, torque or position settings. Higher number
means greater speed)

0

Infinitely variable selector with off (speed is increasing from 0 setting)

Arrow (action in the direction of arrow)

Alternating current (type or a characteristic of current)

Direct current (type or a characteristic of current)

Alternating or direct current (type or a characteristic of current)

Class II construction (designates double insulated construction tools)

Earthing terminal (grounding terminal)

2610051968_IWHT180 HTH181 HTH182 1/15/19 10:20 AM Page 6

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Important: Some of the following symbols may be used on your tool. Please study them
and learn their meaning. Proper interpretation of these symbols will allow you to operate
the tool better and safer.

Symbols

Symbol Designation / Explanation

Designates Li-ion battery recycling program

Designates Ni-Cad battery recycling program

Alerts user to read manual

Alerts user to wear eye protection

This symbol designates that this tool is listed by Underwriters
Laboratories.

This symbol designates that this component is recognized by
Underwriters Laboratories.

This symbol designates that this tool is listed by Underwriters
Laboratories, to United States and Canadian Standards.

This symbol designates that this tool is listed by the Canadian
Standards Association.

This symbol designates that this tool is listed by the Canadian
Standards Association, to United States and Canadian Standards.

This symbol designates that this tool is listed by the Intertek Testing
Services, to United States and Canadian Standards.

This symbol designates that this tool complies to NOM Mexican
Standards.

2610051968_IWHT180 HTH181 HTH182 1/15/19 10:20 AM Page 7

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Functional Description and Specifications

Disconnect battery pack from tool before making any assembly,

adjustments or changing accessories. Such preventive safety measures

reduce the risk of starting the tool accidentally.

Cordless Impact Wrench IWHT180, HTH181, HTH182

FIG. 1

Model number IWHT180 HTH181 HTH182

Voltage rating 18 V 18 V 18 V
No load speed n00-1,900/min n00-1,900/min n00-1,900/min
Impact rate 0-2,100 0-2,100 0-2,100

Maximum Capacities

Output drive 1/2" Square drive 1/2" Square drive 7/16" Hex-shank

with friction ring with detent pin with power groove

Model

HTH182 only

Model

IWHT180 only

VENTILATION

OPENINGS

FORWARD/

REVERSING LEVER

& TRIGGER LOCK

BUILT IN

WORK LIGHT

VARIABLE SPEED

TRIGGER SWITCH

BATTERY PACK

RELEASE

BUTTON

BATTERY

PACK

RUBBERIZED

GRIP

OUTPUT

DRIVE

LOCKING

SLEEVE

OUTPUT

DRIVE

Model

HTH181 only

Battery Packs/Chargers

Please refer to the battery/charger list, included with your tool.

Allowed ambient temperature

– during charging

– during operation/storage

32...113 °F (0...+45 °C)
–4...122 °F (–20...+50 °C)

2610051968_IWHT180 HTH181 HTH182 1/15/19 10:20 AM Page 8

Disconnect battery pack

from tool before making
any assembly, adjustments or changing
ac c essor i es. S uch p reven t ive s afet y

measures reduce the risk of starting the tool
accidentally.

Attach o nly high qu ality

ac cess orie s w ith th e
proper size square drive designed for use with
impact wrenches.

-9-

Assembly

(Models HTH181 only)

Your impact wrench is equipped with a 1/2"
square drive with detent pin.

To install a socket, depress detent pin and
push socket completely onto output drive.

To remove, depress detent pin with a nail
through hole in socket and pull socket off
output drive (Fig. 3).

(Model HTH182 only)

To avoid loss of control,

en s ure bit is locked in
chuck by pulling on bit af ter i t has been
inserted.

The chuck accepts only standard 7/16"
hexagonal shank accessories with power
groove.

Your tool is equipped with a quick release
chuck. To insert an accessory, simply pull
lo c king sleev e for w ard, inser t d e sired
accessory into chuck and release locking
sleeve (Fig. 4).

To remove an accessory, pull locking sleeve

(Model IWHT180 only)

Your impact wrench is equipped with a 1/2"
square drive with friction ring.

To ins tall a s ocke t , si mply pus h so c ket
completely onto output drive.

To remove, pull socket off output drive (Fig. 2).

SOCKET

FIG. 2

INSERTING AND REMOVING ACCESSORIES

OUTPUT

DRIVE

CHUCK

LOCKING SLEEVE

BIT

FIG. 4

FIG. 3

SOCKET

DETENT

PIN

OUTPUT

DRIVE

2610051968_IWHT180 HTH181 HTH182 1/15/19 10:20 AM Page 9

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Operating Instructions

forward and simply remove it from the chuck.

VARIABLE SPEED CONTROLLED

TRIGGER SWITCH

Your tool is equipped with a variable speed
trigger switch. The tool can be turned "ON" or
"OFF" by squeezing or releasing the trigger.
The speed can be adjusted from the minimum
to maximum nameplate RPM by the pressure
you apply to the trigger. Apply more pressure
to increase the speed and release pressure to
decrease speed (Fig. 1).

FORWARD/REVERSING

LEVER & TRIGGER LOCK

Af ter tool use , loc k

trigger in “OFF” position
to he lp preven t a cci den tal starts an d
accidental discharge.

Yo u r tool is equ i pped w ith a f o rwar d /
reversing lever and trigger lock located above
the trigger (Fig. 5). This lever was designed
for changing rotation of the bit, and for locking
the trigger in an “OFF” position.

For forward rotation, (with tool pointed away
from you) move the lever to the far left.

For reverse rotation move the lever to the far
right. To activate trigger lock move lever to
the center off position.

Do no t c h a n g e

di r ectio n of rot a tion
until the tool comes to a complete stop.

Shifting during rotation of the tool can
cause damage to the tool.

BUILT IN WORK LIGHT

Your tool is also equipped with a light that
turns on automatically when the switch is
activated, for better visibility when driving
(Fig. 1).

FIG. 5

FORWARD/REVERSING

LEVER & TRIGGER LOCK

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Set Forward/Reversing lever to the center (off
position). Slide charged battery pack into the
housing unti l the b att ery pack locks in to
position (Fig. 6)

Your tool is equipped with a secondary locking
la tch to preve nt th e ba tter y pa ck 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).

INSERTING AND RELEASING BATTERY PACK

FIG. 6

Operating Tips

INSTALLING FASTENERS

To fasten: Start the fastener by hand on to or
i

n 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
mounte d to the wren ch, sli de 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
fast ene r enc ounte rs re sistance . See the
following chart to estimate the amount of
impact time requir ed to o btain a desire d
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.

Th e torqu e build - up depe n ds on th e
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.
Therefo re, a long er im pacting/ tig htening
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.

Operating Instructions

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