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SIW 10‑22

Original operating instructions

Information about the operating instructions

About these operating instructions

  • Read these operating instructions before the product is used or operated for the first time. This is a prerequisite for safe, trouble-free handling and use of the product.
  • Observe the safety instructions and warnings in these operating instructions and on the product.
  • Always keep the operating instructions with the product and make sure that the product is accompanied by these operating instructions only, when the product is given to other persons.

Explanation of symbols


Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:
  • Draws attention to imminent danger that will lead to serious personal injury or fatality.
  • Draws attention to a potential threat of danger that can lead to serious injury or fatality.
  • Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the equipment or other property.

Symbols in the operating instructions

The following symbols are used in these operating instructions:
Image alternative Comply with the operating instructions
Image alternative Instructions for use and other useful information
Image alternative Dealing with recyclable materials
Image alternative Do not dispose of electric equipment and batteries as household waste
Image alternative Hilti Li‑ion battery
Image alternative Hilti charger

Symbols in illustrations

The following symbols are used in illustrations:
Image alternative These numbers refer to the illustrations at the beginning of these operating instructions.
Image alternative The numbers in illustrations refer to important work steps or to components important for the work steps. In the text, the corresponding numbers draw attention to these work steps or components, e.g. (3) .
Image alternative Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
Image alternative This symbol is intended to draw your special attention to certain points for handling the product.

Product-dependent symbols

General symbols

Symbols used in relation to the product.
Image alternative The product supports near-field communication (NFC) technology compatible with iOS and Android platforms.
Image alternative Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use .
Image alternative Rated speed under no load
Image alternative Direct current (DC)
Image alternative Revolutions per minute
Image alternative Forward / reverse
Image alternative Li-ion battery
Image alternative Never use the battery as a striking tool.
Image alternative Do not drop the battery. Never use a battery that has suffered an impact or is damaged in any other way.
Image alternative 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.

Product information

Image alternative 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
    Impact wrench
    SIW 10-22
    Serial no.


General power tool safety warnings

Image alternative 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.
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.
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.
  • 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.

Safety warnings for screwdrivers and impact wrenches

  • 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 could give the operator an electric shock.

Additional safety instructions

  • Use the product and accessories only when they are in perfect working order.
  • Never tamper with or modify the product or accessories in any way.
  • 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.
  • Keep the air vents clear at all times. Risk of burn injuries due to blocked air vents!
  • Avoid touching rotating parts – risk of injury!
  • Wear eye protection, a hard hat and ear protection while the product is in use.
  • Wear protective gloves when changing the accessory tool. Touching the accessory tool can result in cuts and burns.
  • Wear eye protection. Flying fragments present a risk of injury to the body and eyes.
  • Dust produced by grinding, sanding, cutting and drilling can contain dangerous chemicals. Some examples are: lead or lead-based paints; brick, concrete and other masonry products, natural stone and other products containing silicates; certain types of wood, such as oak, beech and chemically treated wood; asbestos or materials that contain asbestos. Determine the exposure of the operator and bystanders by means of the hazard classification of the materials to be worked. Implement the necessary measures to restrict exposure to a safe level, for example by the use of a dust collection system or by the wearing of suitable respiratory protection. The general measures for reducing exposure include:
  • working in an area that is well ventilated,
  • avoidance of prolonged contact with dust,
  • directing dust away from the face and body,
  • wearing protective clothing and washing exposed areas of the skin with water and soap.
  • Take frequent breaks and do physical exercises to improve the blood circulation in your fingers. High vibration during long periods of work can lead to disorders of the blood vessels and nervous system in the fingers, hands and wrists.
  • Do not look directly into the light source (LED) of the product and do not aim the beam at other persons’ faces. Risk of dazzling or eye damage.
  • Switch the product on only after you have brought it to the working position.
  • Wait until the product has come to a complete stop before you lay it down.
  • Risk of injury by falling tools and/or accessories. Before starting work, check that the battery and installed accessories are secure.

Careful handling and use of batteries

  • 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!
  • 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.


Product overview

Image alternative
  1. Tool mount (3/4" square drive)
  2. Forward/reverse switch with switch-on interlock
  3. Control switch (with electronic speed control)
  4. Grip
  5. Installation opening for accessories
  6. Battery
  7. Mode indicator
  8. Mode selector
  9. Work-area light (LED)
  10. Battery release button
  11. Battery status indicator

Intended use

The product described is a hand-held cordless impact wrench. It is designed for driving and removing screws and for tightening and releasing nuts and bolts in wood, metal, masonry and concrete.

Use the impact wrench only for applications that do not require a precise/specified torque. Failure to observe this point presents a risk of over-tightening and damage to the bolt, screw or workpiece.
Image alternative
  • 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.

Items supplied

Impact wrench, operating instructions
Other system products approved for use with this product can be found at your local Hilti Store or at:

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.

Indicators for state of charge and fault messages

Short-press the release button of the battery to get whichever of the following status indications is applicable at the time.
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.
State of charge and, if applicable, faults are indicated constantly as long as the connected product is switched on.
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 battery has been charged, consult Hilti Service.
One (1) LED quick-flashes yellow
The Li-ion battery or the product in which it is inserted is overloaded, too hot or too cold, or experiencing some other fault.
Bring the product and the battery to the recommended 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.

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.
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 remaining 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.

Technical data

SIW 10‑22
Rated voltage
21.6 V
Weight without battery
2.86 kg
(6.31 lb)
Speed settings
2 settings
Rated speed under no load
Mode I
0 /min … 1,000 /min
(0 Hz … 16.7 Hz)
Mode II
0 /min … 1,250 /min
(0 Hz … 20.8 Hz)
Impact speed
Mode I
0 /min … 2,000 /min
(0 Hz … 33.3 Hz)
Mode II
0 /min … 2,500 /min
(0 Hz … 41.7 Hz)
Tool holder
³⁄₄" square drive with through hole and locking ring
Storage temperature
−20 ℃ … 70 ℃
(−4 ℉ … 158 ℉)
Ambient temperature for operation
−17 ℃ … 60 ℃
(1 ℉ … 140 ℉)


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 ℉)

Preparations at the workplace

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.

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.

Inserting the battery

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.
  3. Check that the battery is seated securely.

Removing the battery

  1. Press the battery release button.
  2. Remove the battery from the product.

Fall arrest

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 a combination of the Hilti retaining strap and the Hilti tool tether #2261970.
  • Secure the retaining strap to the installation openings for accessories. Check that it holds securely.
  • Secure one carabiner of the tool tether to the retaining strap and secure the second carabiner to a load-bearing structure. Check that both carabiners hold securely.
    Comply with the operating instructions of the Hilti retaining strap and those of the Hilti tool tether.

Installing an accessory tool

Risk of injury through use of the wrong type of accessory tool!
  • Do not use worn or damaged accessory tools.
Image alternative
  1. Clean the connection end of the accessory tool.
  2. Push the accessory tool fully on to the tool holder.
  3. Check that the accessory tool is held correctly.

Removing the accessory tool

Risk of injury by the accessory tool! The accessory tool might be hot or have sharp edges.
  • Wear protective gloves when changing the accessory tool.
  • Pull the accessory tool off the tool holder.

Installing/removing friction ring and O-ring

Image alternative
  1. Using suitable pliers, remove the worn/damaged friction ring and the O-ring.
  2. Seat the new O-ring in the groove in the tool holder.
  3. Seat the friction ring in the groove in the tool holder.
  4. Make sure that the accessory tool is securely installed in the tool holder.

Selecting mode

Image alternative
  1. Repeatedly press the mode selector until the mode indicator shows the mode you want to use (see Technical data ).
  2. To switch the light on for 2 minutes, simultaneously press the mode selector and the control switch for at least 0.5 seconds.
    • The LEDs for the mode indicator go out.


Observe the safety instructions and warnings in this documentation and on the product.

Setting forward or reverse rotation

Image alternative
  • Set the forward/reverse switch to the desired direction of rotation.
    • An interlock prevents switching while the motor is running.
    • The control switch is locked when the forward/reverse switch is in the middle position (switch-on interlock).

Switching on and off

  1. To switch the product on, press the control switch.
    Speed of rotation is regulated by the travel of the control switch.
  2. To switch the product off, release the control switch.

Care and maintenance

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.
Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including burns.
  • Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical specialists.
  • Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  • Do not use the product if signs of damage are found or if parts malfunction. Immediately have the product repaired by Hilti Service.
  • After cleaning and maintenance, install all guards and protective devices and check that they are in full working order.
To help ensure safe and reliable operation, use only genuine Hilti spare parts, consumables and accessories. Spare parts, consumables and accessories approved by Hilti for use with your product can be found at your Hilti Store or online at:

Transport and storage

Transport of cordless power tools and batteries
    Accidental starting during transport !
  • Always transport your products with the batteries removed!
  • Remove the battery/batteries.
  • Never transport batteries loose and unprotected. During transport, batteries should be protected from excessive shock and vibration and isolated from any conductive materials or other batteries that may come in contact with the terminals and cause a short circuit. Comply with the locally applicable regulations for transporting batteries.
  • Do not send batteries through the mail. Consult your shipper for instructions on how to ship undamaged batteries.
  • Prior to each use and before and after prolonged transport, check the product and the batteries for damage.
Storage of cordless power tools and batteries
    Accidental damage caused by defective or leaking batteries !
  • Always store your products with the batteries removed!
  • Store the product and the batteries in a cool and dry place. Comply with the temperature limits stated in the technical data.
  • Do not store batteries on the charger. Always remove the battery from the charger when the charging operation has completed.
  • Never leave batteries in direct sunlight, on sources of heat, or behind glass.
  • Store the product and batteries where they cannot be accessed by children or unauthorized persons.
  • Prior to each use and before and after prolonged storage, check the product and the batteries for damage.


If a problem occurs, always observe the status indicator of the battery. See the section headed Status indicators of the Li‑ion battery .
If the trouble you are experiencing is not listed in this table or you are unable to rectify the problem by yourself, contact Hilti Service.
Trouble or fault
Possible cause
Action to be taken
Product does not work.
The battery is not fully inserted.
  • Push the battery in until it engages with an audible click.
Running speed suddenly drops considerably.
Battery is discharged.
  • Change the battery and charge the empty battery.
The battery runs down more quickly than usual.
Very low ambient temperature.
  • Allow the battery to warm up slowly to room temperature.
The battery does not engage with an audible click.
The retaining lugs on the battery are dirty.
  • Clean the retaining lugs and engage the battery in the working position.
Product or battery gets very hot.
Electrical fault.
  • Switch the product off immediately, remove the battery, keep it under observation, allow it to cool down and contact Hilti Service.
LEDs of the battery show nothing
Battery defective.
  • Contact Hilti Service.


Risk of injury due to incorrect disposal! Health hazards due to escaping gases or liquids.
  • DO NOT send batteries through the mail!
  • Cover the terminals with a non-conductive material (such as electrical tape) to prevent short circuiting.
  • Dispose of your battery out of the reach of children.
  • Dispose of the battery at your Hilti Store , or consult your local governmental garbage disposal or public health and safety resources for disposal instructions.
Image alternative Most of the materials from which Hilti products are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, your old tools, machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti sales representative for further information.
Image alternative
  • Do not dispose of power tools, electronic equipment or batteries as household waste!

Manufacturer’s warranty

  • Please contact your local Hilti representative if you have questions about the warranty conditions.

Further information

Image alternative
For more information on operation, technology, environment and recycling, follow this link:
This link is also to be found at the end of the documentation, in the form of a QR code.