GX 2

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

Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:

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

Symbols in illustrations

The following symbols are used in illustrations:

	These numbers refer to the illustrations at the beginning of these operating instructions.
	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) .
	Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
	This symbol is intended to draw your special attention to certain points for handling the product.

Product-dependent symbols

Symbols on the product

The following symbols are used on the product:

	General mandatory sign
	Wear eye protection
	Wear ear protection
	Wear a hard hat
	Return waste material for recycling
	The power tool supports near-field communication (NFC) technology, which is compatible with iOS and Android platforms.
	Li-Ion battery
	Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use .

Highlighting of designations and markings

Designations and markings are indicated as follows:

‚ ‛	Description of marked operating controls on the fastening tool
« »	Markings on the fastening tool

Product information

Hilti products are designed for professional use and may be operated, serviced and maintained only by trained, authorized personnel. 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, gas-actuated	GX 2
  Generation:	01
  Serial number:

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 of conformity can be found at the end of this documentation.
The technical documentation is filed and stored here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistraße 6 | 86916 Kaufering, DE

Safety instructions

These safety instructions apply for fastening tools with and without magazine.
General instructions concerning personal safety

• Stay alert, watch what you are doing and use common sense when working. Do not use the tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating the tool may result in serious personal injury.
  
• Wear your personal protective equipment and always wear protective glasses. Depending on the application and type of tool in use, wearing personal protective equipment such as a dust mask, non-slip safety footwear, hard hat and ear protection reduces the risk of injury.
  
• Always wear gloves if cleaning or maintenance has to be carried out before the tool has been allowed to cool down.
  
• Wear suitable ear protection (see noise information in the technical data section). Fasteners are driven through ignition of a gas/air mixture. The resulting noise exposure may cause damage to the hearing. Other persons in the vicinity should also wear suitable hearing protection.
  
• Adopt the correct posture when working. Maintain proper footing and balance at all times. This will give you better control of the product in unexpected situations.
  
• Use fastening tool, accessories, accessory tools, etc. in accordance with these instructions. Take the working conditions and the work to be performed into account. Use of equipment for applications other than those intended can result in hazardous situations.
  
• Keep other people away from the working area, especially children.
  

Working safely with the fastening tool

• Pressing the nosepiece of the fastening tool against a part of the body may lead to serious injury due to inadvertent actuation and release of a fastener. Never press the nosepiece of the tool against your hand or any other part of the body.
  
• When you are positioning a fastener ready for driving, take your finger off the trigger and do not apply too much pressure to the fastener guide. When inserting/loading application-specific fasteners (e.g. washers, clips or clamps, etc.) in/on the fastener guide there is a risk of serious injury due to inadvertent actuation of the tool resulting in discharge of a fastener.
  
• Never point the fastening tool towards yourself or any other person.
  
• Keep your arms flexed when operating the tool (do not straighten the arms).
  
• Always keep the fastening tool firmly under control every time you drive a fastener and hold it vertical to and steadily against the working surface. This will help to prevent the fastener being deflected by the base material.
  
• When pulling back the nail pusher, always take care to ensure that it engages.
  
• Before you drive a fastener, check that when the tool is fired there is no risk to persons or objects in front of, behind or below the working area. It is not permissible for persons or parts of the body to be behind the work surface into which a fastener is going to be driven.
  
• Do not attempt to drive fasteners into materials that are too hard , such as welded steel or cast steel. Attempting to drive fasteners into these materials may lead to malfunctions, incorrectly driven fasteners or breakage of fasteners.
  
• Do not attempt to drive fasteners into materials that are too soft , such as wood or drywall/gypsum board without the adequate support of carrier material. Attempting to drive fasteners into these materials may lead to malfunctions and fasteners being driven incorrectly or driven right through the material.
  
• Do not attempt to drive fasteners into materials that are too brittle , such as glass or tiles. Attempting to drive fasteners into these materials may lead to malfunctions, fasteners being driven incorrectly and may cause the material to shatter.
  
• Before driving fasteners, check that there is no risk of injuring persons or of damaging objects present behind or below the working surface.
  
• Pull the trigger only when the fastening tool is at right angles to and pressed fully against the work surface.
  
• If fasteners are driven at a high rate or if the tool used for a long period, surfaces of the tool beyond the grip areas may get hot. Wear protective gloves to avoid burning injuries.
  
• If the fastening tool overheats, remove the gas can and allow the tool to cool down. Do not exceed the specified maximum fastener driving rate.
  
• Driving fasteners can cause forcible ejection of fragments, for example from the material, fasteners or magazine strip. Flying fragments present a risk of injury to the body and eyes. Wear eye protection, ear protection and a hard hat. Depending on the application and type of fastening tool in use, wearing personal protective equipment such as a dust mask, non-slip safety footwear, hard hat and ear protection reduces the risk of injury. Other persons in the vicinity must also wear eye protection and a hard hat.
  
• Never drive a second fastener at the same location. This may lead to breakage or jamming of fasteners.
  
• Always remove the gas can (instructions), battery (instructions) and magazine contents before you change the magazine or carry out cleaning and maintenance work. Remove the gas can, battery and magazine contents whenever you are going to leave the fastening tool unattended, transport it or put it into storage.
  
• Risk of bursting due to exposure to heat! Protect fastening tool, accessories and consumables against exposure to strong heat from heat sources such as naked flames, heating elements, soldering and welding equipment.
  
• To ensure that the fastening tool functions faultlessly and as intended, always check the tool and accessories for possible damage before use. Check that moving parts function faultlessly, without sticking, and that no parts are damaged. In order to ensure faultless operation of the fastening tool, all parts must be fitted correctly and must meet the necessary requirements. Damaged protective devices or other parts must be properly repaired or replaced by Hilti Service unless otherwise stated in the operating instructions.
  
• Have the fastening tool repaired only by trained and qualified specialists using genuine Hilti spare parts. This will ensure that the safety of the fastening tool is maintained.
  
• Tampering with or modification of the fastening tool is not permissible.
  
• Do not use the fastening tool where there is a risk of fire or explosion.
  
• Take influences of the surrounding area into account. Do not expose the fastening tool to rain or snow and do not use it in damp or wet conditions.
  
• Use the fastening tool only in well-ventilated working areas.
  
• Select the correct combination of fastener guide and fastener. The wrong combination may result in damage to the tool and in reduced fastening quality.
  
• Do not overload the tool. Use the correct tool for the job. The correct tool will do the job better and more safely within the performance range for which it is designed.
  
• Always observe the application guidelines.
  

Hazards presented by electricity

• Before beginning work, check the working area (e.g. using a metal detector) to ensure that no concealed electric cables or gas and water pipes are present.
  
• Hold the fastening tool only by the insulated grip when working in areas where fasteners may be driven inadvertently into concealed electric cables. Contact with a live electric cable may cause metal parts of the fastening tool also to become live, leading to a risk of electric shock.
  
• Avoid body contact with earthed or grounded surfaces such as pipes, radiators, cookers, stoves and refrigerators. There is an increased risk of electric shock if your body is grounded.
  

Use and care of battery-powered tools

• Avoid accidental starting. Carrying power tools with your finger on the switch or plugging in power tools that are already switched on invites accidents.
  
• Do not expose batteries to high temperatures, the direct heat of the sun, and keep them away from fire. There is a risk of explosion.
  
• Do not disassemble, squash or incinerate batteries and do not subject them to temperatures over 80°C. This presents a risk of fire, explosion or injury through contact with caustic substances.
  
• Avoid ingress of moisture. Ingress of moisture may cause a short circuit, resulting in burning injuries or fire.
  
• Use only batteries of the type approved for use with the applicable tool. Use of other batteries or use of the batteries for purposes for which they are not intended presents a risk of fire and explosion.
  
• Observe the special guidelines applicable to the transport, storage and use of Li-ion batteries.
  
• Remove the battery from the tool before transport or storage.
  
• When the battery is not in use, keep it away from paper clips, coins, keys, nails, screws and other small metal objects that could cause bridging between the terminals. A short circuit between the battery terminals may cause burns or a fire.
  
• Do not attempt to charge or continue to use damaged batteries (e.g. batteries with cracks, broken parts, bent or pushed-in and/or pulled-out contacts).
  
• A battery that is too hot to touch may be defective. Allow the battery to cool down in a place where there is no risk of causing a fire. Check that there are no flammable materials nearby. Contact Hilti Service.
  
• Misuse can result in liquid escaping from the battery. Avoid contact with the liquid. If contact accidentally occurs, rinse with water. Seek medical attention if the liquid comes into contact with the eyes. Liquid ejected from the battery may cause skin irritation or burns.
  

Instructions for handling the propellant gas

• Observe the safety instructions printed on the gas can and in the accompanying information.
  
• The gas is highly flammable. Keep the gas can away from open flames and other sources of ignition.
  
• Escaping gas is harmful to the lungs, skin and eyes and can cause cold injuries and burns. Keep your face and eyes away from the metering valve and the gas can compartment for up to approximately 10 seconds after removing the gas can.
  
• Never attempt to remove or manually operate the metering valve of a gas can that has been prepared for use or is in use. Considerable quantities of pressurized liquefied gas could escape, endangering you and other persons.
  
• If a person has inhaled gas, take the person into the open air or into a well-ventilated area and place the person in a comfortable position. Consult a physician if necessary.
  
• Call a doctor if the person is unconscious. Bring the person into a well-ventilated area and place the person in the stable recovery position (i.e. lying on the side). If the person is not breathing, administer artificial respiration and, if necessary, supply oxygen.
  
• After eye contact with gas, rinse the open eyes thoroughly under running water for several minutes.
  
• After skin contact with gas, wash the contact area carefully with soap and warm water. Subsequently apply a skin cream.
  

Overview of the product

1. Fastener guide
   
2. Slider for fastener driving depth adjustment and for releasing the fastener guide
   
3. Belt hook
   
4. Safety trigger
   
5. Magazine lockbutton
   
6. Support leg
   
7. Magazine
   
8. Nail pusher
   
9. Cooling air slots
   
10. Gas can compartment
    
11. Battery release button
    
12. Battery charge status display
    
13. Gas can status indicator button
    
14. Gas can status indicator
    

Intended use

The product described is a gas-actuated fastening tool. It is designed to drive suitable fasteners (nails) into concrete, steel, concrete-block masonry, sand-lime block, rendered masonry and other materials suitable for use of the direct fastening technique.

The fastening tool, gas can, battery and fasteners form a technical unit. This means that trouble-free fastening with this fastening tool can be ensured only when it is used together with the fasteners, gas cans and batteries specially manufactured for it by Hilti . The fastening and application recommendations made by Hilti apply only when these conditions are observed.
The fastening tool is for hand-held use only.

• Use only the Hilti B12/2.6 and respectively the B 12‑30 Li ion battery for this product.
  
• Use only Hilti battery chargers of the C 4/12-50 series for charging these batteries.
  

Items supplied

Gas-actuated fastening tool with fastener guide, 2 batteries, charger, toolbox and operating instructions.

Fastener guide

The fastener guide holds the studs or, respectively, guides the nails and, when the tool is actuated, thus directs the fasteners into the supporting material at the desired position.

Slider for fastener driving depth adjustment and for releasing the fastener guide

The slider can be used to reduce the depth to which the fastener is driven. In the EJECT position, it releases the fastener guide for removal.

Status	Meaning
+	Standard fastener driving depth
‑	Reduced fastener driving depth
EJECT	Fastener guide release

Support leg

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 an uneven or undulating surface it may be necessary to remove the support leg in order to allow the fastener guide to be held perpendicular to the working surface.

Belt hook

The belt hook can be extended in three stages.

Status	Meaning
Position 1	Position for attaching to a waist belt
Position 2	Position for attaching to ladders, scaffolds, platforms, etc.
Position 3	Belt hook removed

Gas can

In order to operate the fastening tool, the gas can must be inserted in the gas can compartment.
The gas can status can be read from the LED display after pressing the GAS button.
The gas can must be removed before breaks between working, before maintenance and before transporting or storing the fastening tool.

Indication of gas can status

After pressing the GAS button, the LED display indicates the status of the gas can.

Status	Meaning
All four LEDs light green.	The level is between 100 % and 75 %.
Three LEDs light green.	The level is between 75 % and 50 %.
Two LEDs light green.	The level is between 50 % and 25 %.
One LED lights green.	The level is between 25 % and 10 %.
One LED blinks green.	Level is below 10 %. Replacement of the gas can is recommended. The gas can is empty or is malfunctioning. Replacement of the gas can is recommended. Even when the level is indicated as “empty”, the gas can, for technical reasons, still contains a little gas.
One LED blinks red.	No gas can or the wrong type of gas can is present in the fastening tool.

Indication of battery charge status

After pressing a battery release button, the display shows the status of the battery and the fastening tool.

Status	Meaning
All four LEDs light green.	Charge status is 75 % to 100 %.
Three LEDs light green.	Charge status is 50 % to 75 %.
Two LEDs light green.	Charge status is 25 % to 50 %.
One LED lights green.	Charge status is 10 % to 25 %.
One LED blinks green.	Charge status is below 10 %. The fastening tool is ready for operation.
One LED blinks green.	The fastening tool is overloaded or overheated and thus not ready for operation.

Fastening tool

Weight (empty)	3.9 kg
Application temperature, ambient temperature	−10 ℃ … 45 ℃
Maximum fastener length	39 mm
Fastener diameter	2.6 mm 3.0 mm
Compression stroke	20 mm
Magazine capacity in strips of 10 nails (Magazine capacity)	1 … 4
Maximum magnetic field strength	−7.6 dBµA/m
Frequency	13,553 MHz … 13,567 MHz

Noise information and vibration values

The sound pressure and vibration values given in these instructions have been measured in accordance with a standardized test and may be used to compare one fastening tool with another. They may be used for a preliminary assessment of exposure. The data given represents the main applications of the fastening tool. However, if the fastening tool is used for different applications, with different accessories or is poorly maintained, the data may vary. This may significantly increase exposure over the total working period. An estimation of the level of exposure should also take into account the periods of time when the tool is not actually in use. This may significantly reduce exposure over the total working period. Prescribe additional safety measures to protect the operator from the effects of noise and/or vibration, such as: maintenance of the direct fastening tool and its additional equipment or accessories, keeping the hands warm, organization of work patterns.
Noise emission values determined in accordance with EN 15895

	GX 2
Emission sound pressure level at the workplace (LpA, 1s)	96 dB(A)
Peak sound pressure level at the workplace (LpC, peak)	130 dB(C)
Sound (power) level (LWA, 1s)	100 dB(A)
Uncertainty (sound level)	2 dB(A) / 2 dB(C)

Recoil

	GX 2
Energy-equivalent acceleration, for 1 mm sheet metal onto concrete C40: (ahw, RMS(3))	3.69 m/s²
Uncertainty	0.22 m/s²

Equipment required for driving nails

Nails are fed through the magazine in strip form (ready-to-use strips of nails).

Loading the magazine

1. Pull the nail pusher back until it engages.
   
2. Slide the nail strips into the magazine as far as they will go.
   
   Strips of short nails could be inadvertently inserted the wrong way round. With short nails, take care to ensure that the tips of the nails point towards the nose of the tool.
   

3. Release the nail pusher and guide it forward as far as it will go.
   

Inserting the gas can

Every new gas can has a transport lock. Before inserting a new gas can, remove the transport lock.

1. Open the gas can compartment cover.
   
2. Push the gas can (with metering valve fitted) into the red adapter in the gas can compartment.
   
3. Close the gas can compartment cover.
   

Inserting the battery

1. Check that the contacts on the battery and on the fastening tool are undamaged and free from foreign objects.
   
2. Fit the battery and make sure that it is heard to engage.
   
   • Once the battery has been fitted, the charge status LEDs light for a short time.
     

3. Check that the battery is securely seated in the fastening tool.
   

Removing the battery

• Press the release button and pull the battery out of the fastening tool.
  

Removing the gas can

1. Open the gas can compartment.
   
2. Remove the gas can.
   
3. Close the gas can compartment.
   

Unloading the magazine

1. Pull the nail pusher back until it engages.
   
2. Remove all nail strips from the magazine.
   

3. Release the nail pusher and guide it forward as far as it will go.
   

Removing the transport safety device from a new gas can

1. Lift the transport safety device, containing the metering valve, away from the gas can.
   
2. Remove the metering valve from the transport safety device.
   
3. Fit the metering valve onto the gas can, with the foremost of the two grooves on the lip of the can.
   
4. Press the metering valve firmly onto the gas can, bringing the rearmost groove towards the lip of the can, until the metering valve is heard to snap into place over the lip and it then lies flush with the can.
   

Checking the status of the gas can

1. After inserting the battery, press the GAS button without pressing the fastening tool against the working surface.
   
2. Read the gas can status from the display.
   

Removing the magazine

1. Pull the nail pusher back until it engages.
   
   The magazine cannot be removed if the nail pusher has not been pulled back until it engages in the rearmost position.
   
2. Remove the loose nail strips from the magazine.
   
3. Release the magazine locking catch.
   
4. Pivot the magazine about the pivot point towards the front.
   
5. Detach the magazine.
   

6. Release the nail pusher and guide it forward as far as it will go.
   

Fitting the magazine

1. Pull the nail pusher back until it engages.
   
   The magazine cannot be fitted if the nail pusher has not been pulled back until it engages in the rearmost position.
   
2. Engage the front end of the magazine with the fastening tool.
   
3. Pivot the magazine towards the fastening tool as far as it will go.
   
4. Close the magazine locking catch.
   

5. Release the nail pusher and guide it forward as far as it will go.
   

Removing the fastener guide

1. Remove the battery.
   
2. Remove the gas can.
   
3. Unload the magazine.
   
4. Move the fastener guide release slider to the EJECT position.
   
5. Remove the fastener guide.
   

Inserting the fastener guide

1. Remove the gas can.
   
2. Remove the battery.
   
3. Unload the magazine.
   
4. Push the fastener guide release slider in the direction of the arrow into the EJECT position and hold it there.
   
   The fastener guide can be inserted only when the slider is held in the EJECT position.
   
5. Slide the fastener guide into the slot in the nose of the fastening tool until it is heard to engage.
   
6. Check that the fastener guide is seated correctly.
   

Removing the support leg

1. Release the support leg engaging mechanism by pressing lightly.
   
2. Pivot the support leg until it can be withdrawn from the locating groove.
   

Fitting the support leg

1. Insert the support leg in the locating groove.
   
2. Pivot the support leg downwards until it engages.
   

Removing foreign objects from the area of the fastener guide

1. Remove the battery.
   
2. Remove the gas can.
   
3. Unload the magazine.
   
4. Remove the magazine.
   
5. Remove the fastener guide.
   
6. Remove all foreign objects from the area of the fastener guide.
   
7. Insert the fastener guide.
   
8. Fit the magazine.
   

Caring for the fastening tool

• Clean the fastening tool regularly with a cloth.
  
• Keep the grip areas free from oil and grease.
  
• Do not use spray equipment, pressure jet washers or running water for cleaning.
  
• Do not use cleaning agents containing silicone.
  
• Do not use sprays or similar lubricating and cleaning agents.
  
• Never operate the fastening tool if the cooling air slots are blocked.
  

Cleaning the fastening tool

• Clean the fastening tool, or have it cleaned, if malfunctions such as misfiring occur increasingly.
  
• For cleaning, use the cleaning set (available as an accessory) and observe the illustrated cleaning instructions enclosed with it.
  

Maintenance

• 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 Center or online at: www.hilti.group .
  
• Check all external parts of the fastening tool for signs of damage at regular intervals and make sure that all the controls function correctly.
  
• Do not use the fastening tool if parts are damaged or if the controls do not function correctly.
  
• Have a defective fastening tool repaired by Hilti Service.
  

Checks after care and maintenance work

• After maintenance, check that the fastener guide is fitted.