UD 4 (01)

About these operating instructions

• Warning! Read and understand all accompanying documentation, including but not limited to instructions, safety warnings, illustrations, and specifications provided with this product. Familiarize yourself with all the instructions, safety warnings, illustrations, specifications, components, and functions of the product before use. Failure to do so may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.
  
• 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 accompanying documentation corresponds to the current state of the art at the time of printing. Please always check for the latest version on the product’s page on Hilti’s website. To do this, follow the link or scan the QR code in this documentation, marked with the symbol .
  
• Ensure that these operating instructions are with the product when it 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

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.

Symbols on the product

Symbols on the product

The following symbols are used on the product:

Protection class II (double-insulated)

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.
  

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.
  

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.
  

Drill safety warnings

Safety instructions for all operations

• Hold the power tool by insulated gripping surfaces, when performing an operation where the cutting accessory or fasteners may contact hidden wiring or its own cord. Cutting accessory or fasteners contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.
  

Safety instructions when using long drill bits

• Never operate at higher speed than the maximum speed rating of the drill bit. At higher speeds, the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal injury.
  
• Always start drilling at low speed and with the bit tip in contact with the workpiece. At higher speeds, the bit is likely to bend if allowed to rotate freely without contacting the workpiece, resulting in personal injury.
  
• Apply pressure only in direct line with the bit and do not apply excessive pressure. Bits can bend causing breakage or loss of control, resulting in personal injury.
  

Additional safety instructions for torquing threaded fasteners

Personal safety

• Use the product only when it is in perfect working order.
  
• Never tamper with or modify the tool in any way.
  
• Always hold the tool firmly with both hands on the grips provided. Keep the grips clean and dry.
  
• Do not touch rotating parts – risk of injury!
  
• Wear suitable protective glasses, a hard hat, ear protection, protective gloves and light respiratory protection while using the power tool.
  
• Wear protective gloves also when changing the tool. Touching the accessory tool can result in cuts and burns.
  
• Wear eye protection. Flying fragments can injure the body and eyes.
  
• Before starting work, check the hazard class of the dust that will be produced when working. Use an industrial vacuum cleaner with an officially approved protection class in compliance with the locally applicable dust protection regulations. Dust from materials such as lead-based paint, certain types of wood and concrete/masonry/stone containing quartz, minerals or metal can be harmful to health.
  
• Make sure that the workplace is well ventilated and, where necessary, wear a respirator appropriate for the type of dust generated. Contact with or inhalation of the dust may cause allergic reactions and/or respiratory or other diseases among operators or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust, especially in conjunction with additives for wood conditioning (chromate, wood preservative). Only specialists are permitted to handle material containing asbestos.
  
• Take breaks and do physical exercises to improve the blood circulation in your fingers. Exposure to vibration during long periods of work can lead to disorders of the blood vessels and nervous system in the fingers, hands and wrists.
  

Electrical safety

• Before beginning work, check the working area for concealed electric cables or gas and water pipes. External metal parts of the power tool may give you an electric shock if you damage an electric cable accidentally.
  
• Have the supply cord and plug checked by a trained electrical specialist and replaced if necessary.
  
• If the power tool’s supply cord is damaged it must be replaced with a specially-prepared and approved supply cord available from Hilti Customer Service.
  

Power tool use and care

• Immediately switch off the power tool if the accessory tool jams. The power tool might twist off-line.
  
• Wait until the power tool stops completely before you lay it down.
  

Product overview

1. Key chuck
   
2. Quick-release chuck
   (alternatively)
   
3. Belt hook
   
4. Grip
   
5. Lockbutton for sustained operation
   
6. Supply cord
   
7. Control switch
   
8. Forward/reverse switch
   

Intended use

The product described is an electric drill. It is designed for drilling in steel, wood and plastic.

Items supplied

Electric drill, operating instructions.
Other system products approved for use with this product can be found at your local Hilti Store or at: www.hilti.group | USA: www.hilti.com

Drill

When powered by a generator or transformer, the generator or transformer’s power output must be twice the rated power shown on the rating plate of the power tool. The operating voltage of the transformer or generator must always be within +5% and -15% of the rated voltage of the power tool.

	UD 4
Product generation	01
Weight	1.4 kg
Protection class	II

Noise information and vibration values

The sound pressure and vibration values given in these instructions were measured in accordance with a standardized test and can be used to compare one power tool with another. They can also be used for a preliminary assessment of exposure.
The data given represent the main applications of the power tool. However, if the power tool is used for different applications, with different accessory tools, or is poorly maintained, the data can vary. This can significantly increase exposure over the total working period.
An accurate estimation of exposure should also take into account the times when the power tool is switched off, or when it is running but not actually being used for a job. This can significantly reduce exposure over the total working period.
Identify additional safety measures to protect the operator from the effects of noise and/or vibration, for example: maintaining the power tool and accessory tools, keeping the hands warm, organization of work patterns.
Noise information

	UD 4
Sound power level (LWA)	94 dB(A)
Emission sound pressure level (LpA)	86 dB
Uncertainty	5 dB

Vibration information

	UD 4
Drilling (ah)	4 m/s²
Uncertainty (K)	1.5 m/s²

Using extension cords

• Use only extension cords of a type approved for the application and with conductors of adequate gauge (cross section). The power tool may otherwise suffer a drop in performance and the extension cord may overheat.
  
• Check the extension cord for damage at regular intervals.
  
• Replace damaged extension cords.
  
• When working outdoors, use only extension cords that are approved and correspondingly marked for this application.
  

Fitting an accessory tool

1. Use the chuck key to open the key chuck.
   
   • alternatively: Open the keyless chuck.
     
2. Check that the connection end of the accessory tool is clean and then insert it in the key chuck or, respectively, pull the accessory tool out of the keyless chuck.
   
3. Use the chuck key to close the key chuck.
   
   • alternatively: Close the keyless chuck.
     
4. Remove the key from the chuck and insert it in the chuck key holder.
   

Removing the accessory tool

1. Use the chuck key to open the key chuck.
   
   • alternatively: Open the keyless chuck.
     
2. Remove the accessory tool.
   
3. Remove the chuck key and secure the chuck key to the key strap.
   

Switching on

• Press the control switch.
  
  Speed is controlled steplessly up to maximum speed by varying how far the control switch is pressed in.
  

Switching off

• Release the control switch.
  

Activating / deactivating continuous operation

1. Press the control switch.
   
2. Press the lockbutton for continuous operation.
   
   • The product is now in continuous operation mode.
     
3. To switch off continuous operation, press the control switch.
   
4. Release the control switch.
   
   • The product switches off.
     

Direction of rotation

• Set the direction of rotation.
  
  • The selector switch engages in this position.
    

Replacing the tool holder

1. You require the following items:
   

   Materials
   Chuck 2179576
   Open-ended wrench
   Chuck key 2167774
   Quick-release chuck 2234183

2. Disconnect the electric drill from the electric supply.
   
3. Use the chuck key to open the chuck.
   
4. To release the screw in the tool holder, insert a hexagon steel rod in the head of the screw in the tool holder.
   
5. Use the chuck key to close the chuck.
   
6. Grip the drive spindle under the tool holder with an open-end wrench and hold the wrench securely.
   
7. Grip the hexagon steel rod with a correctly-sized open-end wrench and turn the wrench in a counterclockwise direction.
   
   • The tool holder is released.
     
8. Use the chuck key to open the chuck.
   
9. Remove the hexagon rod from the tool holder and insert it in the head of the screw in the new tool holder.
   
10. Use the chuck key to close the chuck.
    
11. Grip the drive spindle under the tool holder with an open-end wrench and hold the wrench securely.
    
12. Grip the hexagon steel rod with a correctly-sized open-end wrench and turn the wrench in a clockwise direction.
    

    Technical data
    Torque (Spindle)	11 Nm … 18 Nm (8 ftlbf … 13 ftlbf)

13. Use the chuck key to open the chuck.
    
14. Tighten the screw in the tool holder.
    

    Technical data
    Torque (Chuck screw)	8 Nm … 13 Nm (6 ftlbf … 10 ftlbf)

Replacing the supply cord

1. You will need the following items:
   

   Materials
   Supply cord 2167712 (110 V GB) 2167713 (230 V GB) 2167714 (230 V CH) 2167715 (120 V US) 2167717 (230 V CN) 2188143 (230 V EU)
   Screwdriver (combi Torx)

2. Disconnect the electric drill from the electricity supply.
   
3. Unscrew the casing screws and remove the casing.
   
4. Unscrew the clamp screws and remove the clamp.
   
5. Release the two screws on the switch unit, so that the two conductors can be pulled out of the switch unit.
   
   Depending on the version, the switch unit has a capacitor connected.
   
6. Remove the supply cord.
   
7. Push the new supply cord through the protective sleeve.
   
8. Insert the ends of the flexible conductors in the switch unit and tighten both screws on the switch unit.
   
   • Both flexible conductors should be firmly secured in the switch unit.
     
9. Place the supply cord in the clamp.
   
10. Fit the upper part of the clamp over the supply cord and tighten the clamp screws.
    

    Technical data
    Torque (Clamp)	1.35 Nm … 1.75 Nm (1.00 ftlbf … 1.29 ftlbf)

    Take care to ensure that the insulation on the supply cord still extends 5 mm beyond the clamp.
    
11. Fit the protective sleeve into the retaining groove provided in the casing.
    
12. Place the casing in position and insert and tighten the casing screws.
    

    Technical data
    Torque (Casing)	1.35 Nm … 1.75 Nm (1.00 ftlbf … 1.29 ftlbf)

Replacing the carbon brushes

1. You will need the following items:
   

   Materials
   Carbon brushes 2167718
   Long-nose pliers
   Screwdriver (flat)
   Screwdriver (combi Torx)

2. Disconnect the electric drill from the electricity supply.
   
3. Unscrew the casing screws and remove the casing.
   
4. Note how the wires and the carbon brushes are fitted.
   
5. Remove the top carbon brush from the cage.
   
6. Disconnect the top carbon brush from the socket.
   
7. Straighten the connector.
   
8. Grip the connector of the bottom carbon brush with long-nose pliers.
   
9. Insert the tip of a flat screwdriver between the long-nose pliers and the connector socket.
   
10. Ease the connector out of the connector socket by turning the flat screwdriver.
    
11. Remove the bottom carbon brush.
    
12. Straighten the connector.
    
13. Connect the top connector to the connector socket of the top carbon brush.
    
14. Push the top carbon brush into the socket.
    
15. Place the top carbon brush in the top cage.
    
16. Connect the bottom connector to the connector socket of the bottom carbon brush.
    
17. Place the bottom carbon brush in the bottom cage.
    
    Make sure that no wires are trapped. The carbon brushes and the wires have to be fitted exactly as they were before replacement.
    
18. Place the casing in position and insert and tighten the casing screws.
    

    Technical data
    Torque (Casing)	1.35 Nm … 1.75 Nm (1.00 ftlbf … 1.29 ftlbf)

Replacing the control switch

1. You will need the following items:
   

   Materials
   Control switch 2167705 (230 V) 2173716 (110 V) 2197122 (120~127 V)
   Screwdriver (flat)
   Screwdriver (combi Torx)

2. Disconnect the electric drill from the electricity supply.
   
3. Unscrew the casing screws and remove the casing.
   
4. Make a note of the positions of the plug connections.
   
5. Remove the supply cord.
   
6. Remove the carbon brushes.
   
7. Lift the motor out of the casing.
   
8. Use long-nose pliers to disconnect the 4 connectors from the stator.
   
9. Connect the 4 connectors of the new control switch to the stator.
   
10. Connect the cable from the capacitor to the stator (see illustration).
    
11. Position the motor and the control switch in the casing.
    
12. Insert the carbon brushes.
    
13. Fit the supply cord.
    
14. Position the wires as shown in the illustration.
    
15. Place the casing in position and insert and tighten the casing screws.
    

    Technical data
    Torque (Casing)	1.35 Nm … 1.75 Nm (1.00 ftlbf … 1.29 ftlbf)

Exchange rotor

1. You will need the following items:
   

   Materials
   Rotor 2197108 (110 V) 2197109 (120-127 V) 2197120 (220-230 V) 2197121 (240 V)
   Screwdriver (flat)
   Screwdriver (combi Torx)

2. Disconnect the electric drill from the electricity supply.
   
3. Unscrew the casing screws and remove the casing.
   
4. Remove the carbon brushes.
   
5. Remove the chuck from the casing.
   
6. Remove the motor from the casing.
   
7. Remove the rotor from the motor and replace it with a new rotor.
   
8. Insert the motor in the casing.
   
9. Insert the chuck in the casing.
   
10. Insert the carbon brushes.
    
11. Place the casing in position and insert and tighten the casing screws.
    

    Technical data
    Torque (Casing)	1.35 Nm … 1.75 Nm (1.00 ftlbf … 1.29 ftlbf)