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NPU 100 IP-A22

Original operating instructions

Information about the documentation

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.

Explanation of symbols used


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 slight personal injury or damage to the equipment or other property.

Symbols in the documentation

The following symbols are used in this document:
Image alternative Read the operating instructions before use.
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

Symbols in the illustrations

The following symbols are used in illustrations:
Image alternative These numbers refer to the corresponding illustrations found at the beginning of these operating instructions
Image alternative The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text
Image alternative Item reference numbers are used in the overview illustrations and refer to the numbers used in the product overview section
Image alternative This symbol is intended to draw special attention to certain points when handling the product.

Symbols on the power tool


The following symbols are used:
Image alternative Risk of cutting injury!
Image alternative Wear protective glasses!
Image alternative Wireless data transfer
Image alternative Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use .

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
    Hole punch
    NPU 100 IP-A22
    Serial no.

Declaration of conformity

We declare, on our sole responsibility, that the product described here complies with the applicable directives and standards. A copy of the declaration issued by the certification department can be found at the end of this documentation.
The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | 86916 Kaufering, Germany


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, clothing and gloves 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.

Additional safety instructions applicable to hole punches

Personal safety
  • Use the product only if it is in perfect working order.
  • Never tamper with or modify the tool in any way.
Electrical safety
  • Before use of the power tool, all live cables or other items carrying electric voltage within the area in which the user is working are to be switched off. If this is not possible, the corresponding safety precautions for working in the proximity of live cables or equipment must be implemented and observed.
  • Do not punch live parts.
Power tool use and care
  • After punching approx. 30 to 40 consecutive holes, switch the power tool off and allow it to cool down for about 15 minutes. Overheating can lead to damage to the power tool.

Battery use and care

  • Observe the special regulations and instructions applicable to the transport, storage and use of Li-ion batteries.
  • Do not expose batteries to high temperatures, direct sunlight or fire.
  • Do not disassemble, crush or incinerate batteries and do not subject them to temperatures over 80 °C.
  • Do not use or charge batteries that have suffered mechanical impact, have been dropped from a height or show signs of damage. In this case, always contact your Hilti  Service .
  • If the battery is too hot to touch it may be defective. In this case, place the product in a non-flammable location, well away from flammable materials, where it can be kept under observation and allowed to cool down. In this case, always contact your Hilti  Service .


Product overview

Image alternative
  1. Punching head
  2. Manual piston return switch
  3. Casing
  4. Servicing and fault indicator (red LED)
  5. Battery release button
  6. Battery
  7. Slot on both sides to fasten the Hilti retaining leash
  8. White LED to illuminate the working area
  9. Control switch

Intended use

The product described is a cordless electro-hydraulic punching tool. It is designed for punching round, square and rectangular holes in steel, aluminum, plastic or fiberglass parts.

Use only the punching dies available through the manufacturer.
Before starting work, check that the sheets to be punched and everything in the work zone (e.g. distribution box/switch cabinet) are not electrically live.
  • Use only Hilti lithium‑ion batteries of the B 22 series with this product.

  • Use only Hilti battery chargers of the C4/36 series for charging these batteries.

Possible misuse

  • Do not use this hand-held power tool clamped in a fixed position or as a stationary device.
  • Do not punch electrically live parts.

Lithium‑ion battery status display

The state of charge of the Li-ion battery and malfunctions of the power tool are indicated by the display on the Li‑ion battery. The state of charge of the Li‑ion battery is displayed after pressing one of the two battery release buttons.
4 LEDs light.
State of charge: 75 % to 100 %
3 LEDs light.
State of charge: 50 % to 75 %
2 LEDs light.
State of charge: 25 % to 50 %
1 LED lights.
State of charge: 10 % to 25 %
1 LED blinks.
State of charge: < 10 %
Battery state of charge cannot be displayed while the control switch is pressed and for up to 5 seconds after releasing the control switch. If the battery display LEDs blink, please observe the instructions given in the “Troubleshooting” section.

Items supplied

Hole punch, operating instructions.
Other system products approved for use with this product can be found at your local Hilti Store or online at: | USA: .

Technical data

NPU 100 IP-A22
Rated voltage
21.6 V
3.02 kg
(6.66 lb)
Max. punching capacity in 10 ga steel
Max. punching capacity in 10 ga stainless steel
Storage temperature
−20 ℃ … 70 ℃
(−4 ℉ … 158 ℉)
Ambient temperature for operation
−17 ℃ … 60 ℃
(1 ℉ … 140 ℉)


Battery operating voltage
21.6 V
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 battery holder until it engages with an audible click.
  3. Check that the battery is seated securely.

Removing the battery

  1. Press the release buttons on the battery.
  2. Pull the battery out of its holder in the device.

Assemble Hilti retaining leash (optional)

Damage to the tool and/or the retaining leash. Incorrect handling may lead to damage to the tool and/or retaining leash.
  • Do not use a metal chain as a retaining leash. Do not use retaining leashes longer than 6 ft (2 m).
To avoid damage and injury, when working at a height it is advisable to use the Hilti retaining strap.
The retaining strap allows a securing cord or leash to be attached.
National regulations applicable to working in high positions must be observed when working with the tool.
Image alternative
  1. Remove the battery.
  2. Insert the two tabs on the retaining leash into the slots on each side of the base.
  3. Secure the retaining leash with the screws supplied.
  4. Refit the battery.

Dismantle the Hilti retaining leash (optional)

Image alternative
  1. Remove the battery.
  2. Remove the two retaining strap securing screws.
  3. Pull the two retaining strap tabs out of the slots in the base and remove the retaining strap.
  4. Refit the battery.

Observing the safety instructions

Risk of injury! Unintentional starting.
  • Remove the battery before inserting, changing or removing the punch, die or other parts.
Risk of injury Risk of eye injuries when drilling and punching.
  • Wear eye protection when drilling and punching.
Risk of injury! Risk of injury caused by flying fragments.
  • When punching holes, take care to ensure that no persons are within the immediate vicinity of the punch, as these persons could be injured by flying fragments in the event of material failure.
  • After punching, when the tool has switched itself off, do not switch the tool on again as this could result in the punch coming into contact with the die. This could cause breakage of parts, resulting in injuries to persons caused by flying fragments.
Risk of injury! Risk of injury caused by flying fragments.
  • Do not use the punch when threaded parts are not fully screwed on.
Risk of injury! Risk of serious injury during the punching operation.
  • Keep your hands and fingers well away from moving parts while punching. Reaching into the punching area could result in crushing injuries or severed fingers.
  • It is essential that the safety instructions are observed.

Punching holes up to 4"

Image alternative
  1. Determine the exact position of the hole. To predrill the hole, use a drill bit of a diameter slightly larger than that of the draw stud.
  2. Select the required punch.
  3. Select the corresponding die.
  4. Select the required draw stud.
  5. Check that the piston in the tool is fully retracted. Assemble the complete punching set, making sure that the cutting side of the punch is facing the sheet metal. Screw the punch in so that it makes light contact with the sheet metal.
  6. Insert the battery.
  7. Press and hold the control switch until the punching operation is automatically completed.
    Disassemble the punch and die and remove any remaining scraps of sheet metal.

Care and maintenance

Risk of injury with battery inserted !
  • Always remove the battery before carrying out care and maintenance tasks!
Care and maintenance of the tool
  • Carefully remove stubborn dirt.
  • Clean the air vents carefully with a dry brush.
  • Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as these can attack the plastic parts.
Care of the Li‑ion batteries
  • Keep the battery free from oil and grease.
  • Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as these may attack the plastic parts.
  • Avoid ingress of moisture.
  • Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  • Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired immediately by Hilti Service.
  • After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare parts, consumables and accessories approved by Hilti for use with the product can be found at your local Hilti Store or online at: .

Transport and storage of cordless tools

    Accidental starting during transport !
  • Always transport your products with the batteries removed!
  • Remove the battery.
  • Never transport batteries in bulk form (loose, unprotected).
  • Check the tool and batteries for damage before use after long periods of transport.
    Accidental damage caused by defective or leaking batteries !
  • Always store your products with the batteries removed!
  • Store the tool and batteries in a place that is as cool and dry as possible.
  • Never store batteries in direct sunlight, on heating units or behind a window pane.
  • Store the tool and batteries in a place where they cannot be accessed by children or unauthorized persons.
  • Check the tool and batteries for damage before use after long periods of storage.


If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by yourself, please contact Hilti Service.

The punching tool is not in working order.

Possible cause
Action to be taken
The LEDs on the battery indicate nothing.
The battery is not correctly inserted.
  • Push the battery in until it engages with a double click.
The battery is discharged.
  • Change the battery and charge the empty battery.
The battery is too hot or too cold.
  • Allow the battery to cool down or to warm up to room temperature.
1 LED on the battery blinks.
The battery is discharged.
  • Change the battery and charge the empty battery.
The battery is too hot or too cold.
  • Allow the battery to cool down or to warm up to room temperature.
4 LEDs on the battery blink.
Product momentarily overloaded.
  • Allow the product to cool down.
Red LED => lights continuously and a warning tone is emitted.
Technical problem.
  • Incorrect operation is possible! Contact Hilti Service.
Red LED => blinks at short intervals and a warning tone is emitted.
The state of charge of the battery is too low to allow a complete operating cycle.
  • Change the battery and charge the empty battery.
Red LED => lights briefly and no warning tone is emitted.
Product overheated.
  • Allow the product to cool down.

The punching tool is in working order.

Trouble or fault
Possible cause
Action to be taken
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 double click.
The retaining lugs on the battery are dirty.
  • Clean the retaining lugs and refit the battery.
Red LED => lights continuously and a warning tone is emitted.
Technical problem.
  • Incorrect operation is possible! Contact Hilti Service.


Image alternative Most of the materials from which Hilti tools and appliances 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 representative for further information.
Battery disposalImproper disposal of batteries can result in health hazards from leaking gases or fluids.
  • 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
  • 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.
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