Hilti NURON BX 3-22 User manual

BX 3-22
BX 3-L-22
BX 3-ME-22 English 1
Français 17
Español 35
Português 53

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BX 3-22
BX 3-L-22
BX 3-ME-22
en Originaloperatinginstructions....................................... 1
fr Noticed'utilisationoriginale ....................................... 17
es Manualdeinstruccionesoriginal .................................... 35
pt Manualdeinstruçõesoriginal ...................................... 53

*2268214* 2268214 English 1
Original operating instructions
1 Information about the documentation
1.1 About this documentation
• Read this documentation before initial operation or use. This is a prerequisite for safe, trouble-free
handling and use of the product.
• Observe the safety instructions and warnings in this documentation and on the product.
• Always keep the operating instructions with the product and make sure that the operating instructions
are with the product when it is given to other persons.
1.2 Explanation of symbols
1.2.1 Warnings
Warnings alert persons to hazards that occur when handling or using the product. The following signal words
are used:
DANGER
DANGER !
▶Draws attention to imminent danger that will lead to serious personal injury or fatality.
WARNING
WARNING !
▶Draws attention to a potential threat of danger that can lead to serious injury or fatality.
CAUTION
CAUTION !
▶Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the
equipment or other property.
1.2.2 Symbols in the operating instructions
The following symbols are used in these operating instructions:
Comply with the operating instructions
Instructions for use and other useful information
Dealing with recyclable materials
Do not dispose of electric equipment and batteries as household waste
Hilti Liion battery
Hilti charger
1.2.3 Symbols in illustrations
The following symbols are used in illustrations:
These numbers refer to the illustrations at the beginning of these operating instructions.
The numbering reflects the sequence of operations shown in the illustrations and may deviate
from the steps described in the text.
Item reference numbers are used in the overview illustration and refer to the numbers used in
the key in the product overview section.
These characters are intended to specifically draw your attention to certain points when handling
the product.

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1.3 Product-dependent symbols
1.3.1 Symbols on the product
The following symbols can be used on the product:
General symbol for "must do"
Wear eye protection
Wear hearing protection
Wear a hard hat
The product supports near-field communication (NFC) technology compatible with iOS and
Android platforms.
Li-ion battery
Never use the battery as a striking tool.
Do not drop the battery. Never use a battery that has suffered an impact or is damaged in any
other way.
Hilti Li-ion battery type series used. Observe the information given in the section headed In-
tended use.
If applied on the product, the product has been certified by this certification body for the US and
Canadian markets according to the applicable standards.
1.4 Product information
products are designed for professional users and only trained, authorized personnel are
permitted to operate, service and maintain the products. This personnel must be specifically informed about
the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by
untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.
▶Write down the serial number in the table below. You will be required to state the product details when
contacting Hilti Service or your local Hilti organization to inquire about the product.
Product information
Fastening tool BX 3-22 | BX 3-L-22 | BX 3-ME-22
Generation 03
Serial no.
2 Safety
2.1 General power tool safety warnings
WARNING 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.
Work area safety
▶Keep 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.

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Electrical safety
▶Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of
electric shock.
▶Avoid body contact with earthed or grounded surfaces, 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, use an extension 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 residual current device (RCD)
protected supply. Use of an RCD 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 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 a
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 energising 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 part of the power tool may result in personal injury.
▶Do not overreach. Keep proper footing and balance at all times. This enables better control of the
power tool in unexpected situations.
▶Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from
moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
▶If devices are provided for the connection of dust extraction and collection facilities, ensure these
are connected and properly used. Use of dust collection can reduce dust-related hazards.
▶Do not let familiarity gained from frequent 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, clean and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

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Battery tool use and care
▶Recharge only with 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 away from other metal objects, like 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 liquid contacts eyes, additionally seek medical help. Liquid
ejected from the battery may cause irritation or burns.
▶Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may
exhibit unpredictable 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 130° C (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 the battery and increase the risk of fire.
Service
▶Have your power tool serviced by a qualified repair person 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 performed by the
manufacturer or authorized service providers.
2.2 Tacker safety warnings
▶Always assume that the tool contains fasteners. Careless handling of the fastening tool can result in
unexpected firing of nails causing personal injury.
▶Do not point the tool towards yourself or anyone nearby. A nail will be ejected by the tool if it is
triggered unexpectedly, possibly leading to injury.
▶Do not actuate the tool unless the tool is placed firmly against the workpiece. If the tool is not in
contact with the workpiece, the fastener may be deflected away from your target.
▶Disconnect the tool from the power source when the fastener jams in the tool. While removing a
jammed fastener, the fastening tool may be accidentally activated if it is plugged in.
▶Use caution while removing a jammed fastener. The mechanism may be under tension and the nail
may be forcefully ejected while attempting to free a jam.
▶When fastening electrical cables, make sure the cables are not energized. Hold the fastening tool
only by insulated gripping surfaces. Use only fasteners designed for electrical cable installations.
Check that the fastener has not damaged the insulation of the electrical cable. A nail that damages
the insulation of electric cables can lead to electric shock and fire hazards.
2.3 Safety instructions
Requirements to be met by users
▶Only authorized, appropriately trained persons may operate or service this product.
Personal protective equipment
▶You and all other persons in the vicinity must wear suitable eye protection, ear protection and a hard hat
while the tool is in use.
Personal safety
▶Observe the information printed in the operating instructions concerning operation, care and maintenance.
▶Stay alert, watch what you are doing and use common sense when operating a fastening tool. Do not
use the product when you are tired or under the influence of drugs, alcohol or medication. Take a break if
you experience pain or feel unwell. A moment of inattention while operating the fastening tool can result
in serious injury.
▶Avoid awkward postures. Make sure you work from a safe stance and stay in balance at all times.
▶Wear non-skid shoes.

*2268214* 2268214 English 5
▶Never pull the fastener guide or fastener back with your hand.
▶Under certain circumstances, the product could be made ready to fire by pulling the fastener guide
or the fastener back by hand. When the tool is ready to fire, fasteners or the piston could accidentally
be driven into parts of the body.
▶Keep your arms slightly bent while operating the product (do not straighten your arms).
▶Keep other people away from the working area, especially children.
▶Risk of injury by falling tools and/or accessories. Before starting work, check that the battery and installed
accessories are secure.
▶Keep the air vents clear at all times. Risk of burn injuries due to blocked air vents!
▶Do not look directly into the light source (LEDs) of the power tool and do not aim the beam at other
persons’ faces. Risk of dazzling or eye damage.
Fastening tool use and care
▶Danger of fasteners penetrating right through! Before driving fasteners, check to make sure that no one
is present behind or below the object into which the fastener is to be driven.
▶Use the right product for the job. Do not use the product for purposes for which it was not intended. Use
it only as directed and when in faultless condition.
▶Never leave a loaded product unattended.
▶Always unload the product (remove fasteners) before cleaning, maintenance, changing the fastener
guide, before work breaks and before storing the product.
▶When not in use, the product must be unloaded and stored in a locked, dry place where it is inaccessible
to children.
▶Check the product and its accessories for damage. Check that moving parts function faultlessly, without
sticking, and that no parts are damaged.
▶All parts must be fitted correctly and fulfill all conditions necessary for correct operation of the
product. Damaged parts must be properly repaired or replaced by Hilti Service unless otherwise
stated in the operating instructions.
▶Before beginning work, check the working area for concealed electric cables or gas and water pipes.
External metal parts of the product could give you an electric shock or cause an explosion if you
accidentally damage an electric cable or a gas or water pipe.
▶Do not attempt to drive fasteners into unsuitable materials.
▶Unsuitable materials include welded steel and cast steel, cast iron, glass, marble, plastic, bronze,
brass, copper, insulating material, hollow brick, ceramic brick, thin sheet metal (< 4 mm) and cellular
concrete. Driving a fastener into these materials may cause the fastener to break, shatter or to be
driven right through.
▶Pull the trigger only when the product is fully pressed against the working surface at right angles.
▶When driving fasteners, always hold the product at right angles to the working surface in order to prevent
the fastener from being deflected by the material.
▶Keep the grips dry, clean and free from oil and grease.
▶Never drop the product.
▶Do not use the magazine as a grip.
▶Do not use the product in places where there is a risk of fire or explosion, unless the product is specially
approved for this type of use.
▶Never drive fasteners into existing holes unless this is recommended by Hilti (e.g. DX-Kwik).
Mechanical safety rules
▶Do not tamper with or modify the product or accessories, especially the piston.
▶Use only fasteners of a type approved for use with the product.
Thermal safety rules
▶Do not exceed the recommended maximum fastener driving rate.
▶If the product has overheated, allow it to cool down.
▶Do not dismantle the product while it is hot. Allow the product to cool down.
2.4 Battery use and care
▶Comply with the following safety instructions for the safe handling and use of Li-ion batteries.
Failure to comply can lead to skin irritation, severe corrosive injury, chemical burns, fire and/or explosion.
▶Use only batteries that are in perfect working order.
▶Treat batteries with care in order to avoid damage and prevent leakage of fluids that are extremely
harmful to health!

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▶Do not under any circumstances modify or tamper with batteries!
▶Do not disassemble, crush or incinerate batteries and do not subject them to temperatures over 80 °C
(176 °F).
▶Never use or charge a battery that has suffered an impact or been damaged in any other way. Check
your batteries regularly for signs of damage.
▶Never use recycled or repaired batteries.
▶Never use the battery or a battery-operated power tool as a striking tool.
▶Never expose batteries to the direct rays of the sun, elevated temperature, sparking, or open flame. This
can lead to explosions.
▶Do not touch the battery poles with your fingers, tools, jewelry, or other electrically conductive objects.
This can damage the battery and also cause material damage and personal injury.
▶Keep batteries away from rain, moisture and liquids. Penetrating moisture can cause short circuits,
electric shock, burns, fire and explosions.
▶Use only chargers and power tools approved for the specific battery type. Read and follow the relevant
operating instructions.
▶Do not use or store the battery in explosive environments.
▶If the battery is too hot to touch, it may be defective. Put the battery in a place where it is clearly visible
and where there is no risk of fire, at an adequate distance from flammable materials. Allow the battery to
cool down. If it is still too hot to touch after an hour, the battery is faulty. Consult Hilti Service or read the
document entitled "Instructions on safety and use for Hilti Li-ion batteries".
Observe the special guidelines applicable to the transport, storage and use of lithium-ion batteries.
Read the instructions on safety and use of Hilti Li-ion batteries that you can access by scanning
the QR code at the end of these operating instructions.
3 Description
3.1 Product overview 1
@Nosepiece
;Fastener guide
=Fastener guide locking catch
%Single-fastener head (BX 3-ME-22)
&Air vents
(Eye for tool tether
)Belt hook
+Safety trigger
§Grip
/Belt hook/scaffold hook
:Battery release button
∙Battery status indicator
$Liion battery
£Installation opening for accessories
|Nail pusher
¡Nail pusher release mechanism
QSupport leg
WMagazine
EStatus indicator, fastening tool
RWork-area light
3.1.1 Equipment
The fastener guide and the support leg are product-dependent. The support legs and fastener guides with
which the product is equipped are listed in the table below.
Further information can be found in the case lid, in your Hilti Store or at: www.hilti.group
Product BX 3-22 BX 3-L-22 BX 3-ME-22
Fastener guide X-FG B3 IF 02 X-FG B3 IF 02 X-FG B3 ME

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Product BX 3-22 BX 3-L-22 BX 3-ME-22
Support leg X-SL B3 03 X-SL B3 03 X-SL B3 ME 03
3.2 Intended use
The product is a hand-held, cordless fastening tool. It is designed to drive specially manufactured fasteners
into concrete, steel, masonry, sand-lime block and other materials suitable for use of the direct fastening
technique. The product is also designed to fasten electrical cables with clips if the appropriate fasteners are
used. Use only approved fasteners in combination with their corresponding fastener guide (see the section
headed "Technical data").
The fastening tool, battery and fasteners together form a technical entity. This means that trouble-free
fastening with this fastening tool can be ensured only when the fasteners specially manufactured for the
purpose by Hilti and the chargers and batteries recommended by Hilti are used. The fastening and
application recommendations made by Hilti apply only when these conditions are observed.
▶The fastening tool is for hand-held use only.
▶Misuse must be ruled out. Misuse is understood to include driving fasteners into very soft materials (e.g.
wood) or into excessively hard materials (e.g. high-strength steel or very hard natural stone).
• For this product, use only Hilti Nuron lithium-ion batteries of the B 22 series. For optimum performance,
Hilti recommends the batteries stated in the table at the end of these operating instructions for this
product.
• For these batteries, use only Hilti chargers of the type series stated in the table at the end of these
operating instructions.
3.3 Safety devices
When using the nail magazine, the nail detector prevents triggering without a nail loaded, which could
damage the fastening tool.
The contact pressure safety device is intended to prevent the free flighting of nails (i.e. actuation and driving
a nail when the nosepiece is not in contact with the workpiece). When using a nail magazine, the fastening
tool can be pressed against the surface and triggered only when a nail is loaded in the tool.
3.4 Features
The fastening tool is equipped with an ergonomic, non-slip and vibration-absorbing grip, a belt and scaffold
hook and a support leg. The fastening tool is protected against overload by electronic overload protection
and from overheating by temperature monitoring.
3.5 Status indicator, fastening tool
The status indicator of the fastening tool provides information about the status of the fastening tool.
Status Meaning
LED is off The fastening tool is switched off
The LED shows green. The fastening tool is switched on and ready for use
The LED flashes green. Battery too hot or battery too weak
The LED flashes green every 3 seconds. The fastening tool is in stand-by mode. Press the
nose of the tool against the working surface to
switch it on
The LED lights blue. The fastening tool is switched on, nail strips require
to be loaded
LED flashes blue. The fastening tool is switched on, the magazine is
completely empty
The LED flashes yellow. Fastening tool is too hot, see Troubleshooting
The LED flashes red. Malfunction; see “Troubleshooting”
The LED shows red. Malfunction; see “Troubleshooting”
3.6 Status indicators of the Liion battery
Hilti Nuron Li-ion batteries can indicate state of charge, fault messages and the battery's state of health.

8 English 2268214 *2268214*
3.6.1 Indicators for state of charge and fault messages
WARNING
Risk of injury by a falling battery!
▶If the release button is pressed with a battery inserted in the product, subsequently check that the battery
is correctly re-engaged and secure.
Short-press the release button of the battery to get whichever of the following status indications is applicable
at the time.
State of charge and, if applicable, faults are indicated constantly as long as the connected product is
switched on.
Status Meaning
Four (4) LEDs show constantly green State of charge: 100 % to 71 %
Three (3) LEDs show constantly green State of charge: 70 % to 51 %
Two (2) LEDs show constantly green State of charge: 50 % to 26 %
One (1) LED shows constantly green State of charge: 25 % to 10 %
One (1) LED slow-flashes green State of charge: < 10 %
One (1) LED quick-flashes green The Li-ion battery is completely discharged.
Recharge the battery.
If the LED again starts quick-flashing after the bat-
tery has been charged, consult Hilti Service.
One (1) LED quick-flashes yellow The Li-ion battery or the product in which it is in-
serted is overloaded, too hot or too cold, or experi-
encing some other fault.
Bring the product and the battery to the recom-
mended working temperature and do not overload
the product when it is in use.
If the message persists, consult Hilti Service.
One (1) LED shows yellow The Li-ion battery and the product in which it is
inserted are not compatible. Consult Hilti Service.
One (1) LED quick-flashes red The Li-ion battery is locked and cannot be used.
Consult Hilti Service.
3.6.2 Indicators showing the battery's state of health
To check the battery's state of health, press the release button and hold it down for longer than three
seconds. The system does not detect a potential malfunction of the battery due to misuse, for example
battery dropped or pierced, external heat damage, etc.
Status Meaning
All LEDs show in sequence, followed by one (1)
LED showing constantly green.
The battery can remain in use.
All LEDs show in sequence, followed by one (1)
LED quick-flashing yellow.
The check to ascertain the battery's state of health
did not complete. Repeat the procedure, or consult
Hilti Service.
All LEDs show in sequence, followed by one (1)
LED showing constantly red.
If a connected product can still be used, the re-
maining battery capacity is below 50 %.
If a connected product can no longer be used, the
battery has reached the end of its useful life and
has to be replaced. Consult Hilti Service.
3.7 Bluetooth®(optional)
The Bluetooth ®word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use
of such marks by Hilti Corporation is under license.
3.7.1 Intended use
This product is equipped with a Bluetooth ®Low Energy Module which enables the status checking of a
power tool and the transfer of settings and data based on Bluetooth ®wireless technology, a data transfer

*2268214* 2268214 English 9
system by which the two Bluetooth-enabled products can communicate with each other over a short
distance. This product is designed to enable communication and data transfers between smart phones and
Hilti gateway. The product can submit data attributes such as location of the receiving device, runtime,
total application count, application count during interval and timestamp of transfer. Information about the
connectivity functions offered can be found in the respective Hilti application (app) or in the operating
instructions of the power tool you are using.
3.7.2 Data transmission via Bluetooth ®
The transmission interval can vary, depending on the available power source of the product. The signal range
may vary greatly depending on external conditions, including the receiving device used. The Bluetooth ®
range may be significantly weaker inside closed rooms and through metallic barriers (e g. walls, shelving
units, cases, etc.). Depending on ambient conditions, several transmission intervals may be required before
the tool is detected.
If the tool is not detected, check the following:
• Is the distance to the mobile terminal device too great?
→ Reduce the distance between the mobile terminal device and the tool
3.7.3 Installing and setting up the app
In order to be able to use the connectivity functions, you first have to install the respective Hilti app.
(1.) Download the app from an appropriate app store.
You will require a user account on the corresponding app store to do this.
(2.) After starting the app for the first time, please either log in with your account or register.
(3.) The display of your mobile terminal device will show you all the subsequent steps required to connect
the power tool to the mobile terminal device.
First, fully complete the tutorial for the app. This will give you a better overview of how the connection
is made and how the connectivity functions are used.
3.8 Deep discharge protection
The product has a hibernation mode to protect the Li-ion battery from deep discharge. This prevents deep
discharge of the battery.
• Deep discharge protection is activated after 360 minutes.
• To deactivate deep discharge protection, remove and then reinsert the battery.
3.9 Items supplied
fastening tool, operating instructions.
Other system products approved for use with this product can be found at your local Hilti Store or at:
www.hilti.group
4 Technical data
BX 3-22 BX 3-L-22 BX 3-ME-22
Weight without battery 3.5 kg
(7.7 lb)
3.5 kg
(7.7 lb)
3.4 kg
(7.5 lb)
Nail length (collated nails) 14 mm … 30 mm
(0.6 in … 1.2 in)
14 mm … 36 mm
(0.6 in … 1.4 in)
14 mm … 24 mm
(0.6 in … 0.9 in)
Nail length (single nails) •/• •/• 30 mm … 36 mm
(1.2 in … 1.4 in)
Nail diameter 3 mm
(0.1 in)
2.75 mm … 3.0 mm
(0.108 in … 0.12 in)
3 mm
(0.1 in)
Magazine capacity 30 nails 30 nails 20 nails

10 English 2268214 *2268214*
BX 3-22 BX 3-L-22 BX 3-ME-22
Compression stroke 12 mm
(0.5 in)
12 mm
(0.5 in)
12 mm
(0.5 in)
Contact pressure 50 N … 70 N
(11 lbf… 16 lbf)
50 N … 70 N
(11 lbf… 16 lbf)
50 N … 70 N
(11 lbf… 16 lbf)
Recommended maximum
fastener driving rate at
room temperature
700/h 700/h 700/h
Rated voltage 21.6 V 21.6 V 21.6 V
Maximum emitted trans-
mission power, Blue-
tooth®
8 dBm 8 dBm 8 dBm
Bluetooth frequency
range
2,402 MHz …
2,480 MHz
2,402 MHz …
2,480 MHz
2,402 MHz …
2,480 MHz
Storage temperature −20 ℃ … 70 ℃
(−4 ℉ … 158 ℉)
−20 ℃ … 70 ℃
(−4 ℉ … 158 ℉)
−20 ℃ … 70 ℃
(−4 ℉ … 158 ℉)
Ambient temperature for
operation
−17 ℃ … 60 ℃
(1 ℉ … 140 ℉)
−17 ℃ … 60 ℃
(1 ℉ … 140 ℉)
−17 ℃ … 60 ℃
(1 ℉ … 140 ℉)
4.1 Battery
Battery operating voltage 21.6 V
Weight, battery See the end of these
operating instructions
Ambient temperature for operation −17 ℃ … 60 ℃
(1 ℉ … 140 ℉)
Storage temperature −20 ℃ … 40 ℃
(−4 ℉ … 104 ℉)
Battery charging starting temperature −10 ℃ … 45 ℃
(14 ℉ … 113 ℉)
5 Preparations at the workplace
WARNING
Risk of injury by inadvertent starting!
▶Before inserting the battery, make sure that the product is switched off.
▶Remove the battery before making any adjustments to the power tool or before changing accessories.
Observe the safety instructions and warnings in this documentation and on the product.
5.1 Charging the battery
1. Before charging the battery, read the operating instructions for the charger.
2. Make sure that the contacts on the battery and the contacts on the charger are clean and dry.
3. Use an approved charger to charge the battery. → page 7
5.2 Inserting the battery
WARNING
Risk of injury by short circuit or falling battery!
▶Before inserting the battery, make sure that the contacts on the battery and the contacts on the product
are free of foreign matter.
▶Make sure that the battery always engages correctly.
1. Charge the battery fully before using it for the first time.
2. Push the battery into the product until it engages with an audible click.

*2268214* 2268214 English 11
3. Check that the battery is seated securely.
5.3 Removing the battery
1. Press the battery release button.
2. Remove the battery from the product.
5.4 Removing the fastener guide
1. Pull the nail pusher down until it engages.
2. Unload the magazine. → page 14
3. Slide the fastener guide locking catch as far as it will go in the direction of the arrow.
▶The fastener guide will be released.
4. Remove the fastener guide.
5.5 Inserting the fastener guide
1. Pull the nail pusher down until it engages.
2. Unload the magazine. → page 14
3. Slide the fastener guide locking catch as far as it will go in the direction of the arrow and hold it in this
position.
4. Slide the fastener guide into the nosepiece until it is heard to engage.
5. Release the fastener guide locking catch.
▶The fastener guide jumps to the middle position.
6. Grip and pull the fastener guide to check that it is securely seated.
5.6 Working safely with the belt and scaffold hook 2
▶Before beginning work, make sure that the belt hook / scaffold hook is securely attached to the product.
▶Use the belt hook / scaffold hook only when necessary. Put the product safely aside if it is to remain
unused for a lengthy period of time.
5.7 Fall arrest 3
WARNING
Risk of injury by falling tool and/or accessory!
▶Use only the Hilti tool tether recommended for your product.
▶Prior to each use, always check the attachment point of the tool tether for possible damage.
▶Do not secure a tool tether to the belt hook. Do not use a belt hook to lift the product.
Comply with the national regulations for working at heights.
As drop arrester for this product, use only the Hilti tool tether #2261970.
▶Use one carabiner to secure the tool tether to the product as shown in the illustration. Check that the
carabiner holds securely.
▶Secure the second carabiner to a load-bearing structure. Check that the carabiner holds securely.
Comply with the operating instructions of the Hilti tool tether.
5.8 Loading for magazine operation 4
CAUTION
Crush hazard! If it is allowed to snap back, the nail pusher can cause injuries and damage the fastening tool.
▶When you pull down the nail pusher make sure it engages securely. Do not allow the nail pusher to snap
back.
1. Pull the nail pusher down until it engages.
2. Slide the nail strips into the magazine (a maximum of 3 strips of 10 nails).

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3. Hold the nail pusher securely and press the nail pusher release button.
4. Guide the nail pusher back until it contacts a nail.
5.9 Loading for single-fastener mode
BX 3-ME-22
CAUTION
Crush hazard! If it is allowed to snap back, the nail pusher can cause injuries and damage the fastening tool.
▶When you pull down the nail pusher make sure it engages securely. Do not allow the nail pusher to snap
back.
1. Pull the nail pusher down until it engages.
2. Slide the nail strip(s) out of the magazine and check that the magazine is empty.
Damage to the fastening tool can result if you do not remove all the nails from the magazine before
using the tool in single-fastener mode.
3. Hold the nail pusher securely and press the nail pusher release mechanism.
4. Guide the nail pusher back.
5. Insert the nail into the recess in the fastener guide. Optionally, you can then also fit an approved fastening
element on to the nose of the fastener guide.
Attempting to drive a fastener with more than one nail in the fastener guide can cause damage
to the fastening tool. When operating the tool in single-fastener mode, load only one nail into the
fastener guide.
6. Activate the single-fastener selector switch.
▶The single-fastener switch engages with an audible click.
Pulling the nail pusher down a few centimeters will disengage the single-fastener switch.
6 Operation
Observe the safety instructions and warnings in this documentation and on the product.
6.1 Using the support leg 5
On an even working surface, the support leg makes it easier to hold the fastening tool perpendicular as
attention then only has to be paid to lateral alignment. On uneven surfaces it might be necessary to retract
the support leg in order to ensure that the fastener guide is perpendicular to the working surface.
6.1.1 Retracting the support leg
1. Push against the support leg to release it from its engaged position.
2. Swing the support leg back.
6.1.2 Extending the support leg
CAUTION
Risk of pinching the fingers! When folding the support leg back there is a risk of trapping and pinching the
fingers between the support leg and the casing of the tool.
▶Hold the fastening tool by the grip when extending/retracting the support leg.
1. Swing the support leg forward.
2. Push against the support leg from below until it engages in the extended position.
6.2 Switching Bluetooth (optional) off
▶Press the fastening tool against the base material for 10 seconds.
▶After 6 seconds the spring element audibly relieves its tension (keep the fastening tool pressed
against the base material for another 4 seconds).
▶Status indicator flashes blue 3 times.

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▶Motor noise sounds 3 times.
▶No further data transfer is possible.
Bluetooth can be deactivated if you are in a sensitive environment (e.g. a hospital) where use of
Bluetooth is prohibited.
To switch Bluetooth back on, remove and then re-insert the battery.
6.3 Switching the fastening tool on/off
6.3.1 Switching on the fastening tool
WARNING
Risk of injury! Pressing the nosepiece of the fastening tool against a part of the body may lead to serious
injury due to inadvertent firing and release of a fastener.
▶Never press the nosepiece of the fastening tool against your hand or any other part of the body.
1. For magazine operation, load the magazine. → page 11
2. Insert the battery. → page 10
▶Status indicator slow-flashes green.
If you continue to operate the fastening tool after battery performance drops, the fastening tool
will switch itself off automatically before damage to the battery cells occurs.
3. To switch the fastening tool on, press it against a suitable surface.
▶Fastening tool is tensioned.
▶The status indicator shows green.
6.3.2 Switching off the fastening tool
▶Remove the battery. → page 11
▶The spring mechanism audibly relieves its tension and the status indicator goes out.
After 6 minutes the fastening tool generates a motor sound as an alert indicating that the fastening
tool is about to switch off. After issuing this alert, the fastening tool switches off automatically.
6.4 Driving a fastener 6
WARNING
Risk of injury by fasteners penetrating right through!
▶Before driving fasteners, check to make sure that no one is present behind or below the object into which
the fastener is to be driven.
WARNING
Risk of injury by flying parts! When driving a fastener, there is a risk of injury to the body and eyes caused
by splintered fragments of the workpiece and by flying parts of the nail strip.
▶Wear personal protective equipment and always wear eye protection and protective gloves. Other
persons in the vicinity must also wear eye protection and a hard hat.
WARNING
Risk of injury! Pressing the nosepiece of the fastening tool against a part of the body may lead to serious
injury due to inadvertent firing and release of a fastener.
▶Never press the nosepiece of the fastening tool against your hand or any other part of the body.
1. Before beginning the work, carry out a test by driving 2 fasteners into the material you are working on.
2. Hold the fastening tool perpendicular to the working surface and press it against the surface, pushing
the fastener guide in as far as it will go.
▶The fastening tool is switched on.
3. Drive the fastener by pressing the safety trigger.
4. Lift the fastening tool completely clear of the working surface after driving a fastener.
The fastening tool changes automatically to standby mode if the fastener guide is pressed against
the working surface for longer than 6 seconds without a fastener being driven. Again pressing the
nosepiece against the base material reloads the fastening tool for firing.

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6.5 Removing a nail when in magazine mode
1. Pull the nail pusher down until it engages.
2. Slide the nail downwards out of the magazine.
3. Hold the nail pusher securely and press the nail pusher release button.
4. Guide the nail pusher back to its original position.
6.6 Releasing a jammed nail
WARNING
There is a risk of injury and damage to the fastening tool. Use of unsuitable items instead of the
recommended genuine Hilti accessories may result in injury or damage to the fastening tool.
▶To release a jammed nail, use only the recommended drift punch set.
WARNING
Risk of injury by flying parts! Triggering the tool (attempting to drive a fastener) when foreign objects are
present in the area around the fastener guide, or when a fastener is jammed in the fastener guide, may lead
to injury caused by flying objects or fragments.
▶Never attempt to clear malfunctions of the fastening tool by continuing to trigger the tool!
Individual nails may get stuck in the fastener guide. You can remove jammed nails from the fastener
guide with the aid of the X-NP drift punch set. Accessories are available from your Hilti Store or can
be ordered online at www.hilti.group.
1. Remove the fastener guide (see → page 11).
2. Fit the fastener guide into the supporting sleeve from the drift punch set.
3. Use the drift punch and a hammer to drive the jammed nail out of the fastener guide.
4. Fit the fastener guide (see → page 11).
7 Care and maintenance
WARNING
Risk of injury with battery inserted !
▶Always remove the battery before carrying out care and maintenance tasks!
Care of the product
• Carefully remove stubborn dirt.
• Carefully clean the air vents, if present, with a dry, soft brush.
• Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as
these can attack the plastic parts.
• Use a dry, clean cloth to clean the contacts of the product.
Care of the Liion batteries
• Never use a battery with clogged air vents. Clean the air vents carefully using a dry, soft brush.
• Avoid unnecessary exposure of the battery to dust and dirt. Never expose the battery to high levels of
moisture (e.g. by being dipped in water or left in the rain).
If a battery has been soaked by moisture, treat it as a damaged battery. Isolate it in a non-flammable
container and consult Hilti Service.
• Keep the battery free of extraneous oil and grease. Do not permit dust or dirt to accumulate unnecessarily
on the battery. Clean the battery with a dry, soft brush or a clean, dry cloth. Do not use cleaning agents
containing silicone as these can attack the plastic parts.
Do not touch the contacts of the battery and do not remove the factory-applied grease from the contacts.
• Use only a slightly damp cloth to clean the housing. Do not use cleaning agents containing silicone as
these can attack the plastic parts.
Maintenance
• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.