DD 160

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

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

Symbols in the documentation

The following symbols are used in this document:

	Read the operating instructions before use.
	Instructions for use and other useful information
	Dealing with recyclable materials
	Do not dispose of electric equipment and batteries as household waste

Symbols in the illustrations

The following symbols are used in illustrations:

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

Symbols on the product

"Must do" symbols

The following "must do" symbols are used on the product:

	Wear eye protection
	Wear a hard hat
	Wear ear protection
	Wear protective gloves
	Wear protective footwear
	Wear light respiratory protection

Status indicator

The following symbols are used on the product:

	Theft protection indicator
	Drilling performance indicator
	Service indicator

Product-dependent symbols

The following symbols can be used on the product:

	Do not transport by crane
	Equipped with theft protection system
	Amps
	Volts
	Alternating current
	Watts
	Hertz
	Rated speed under no load
	Diameter
	Millimeters
	Revolutions per minute
	Wireless data transfer

Information notices

On the drill stand, base plate and diamond core drilling machine

	→ On the drill stand and the vacuum base plate Top : An additional means of securing the drill stand must be employed when the machine is used for horizontal drilling with the vacuum securing method. Bottom : Use of the vacuum securing method for overhead drilling with the drill stand is not permissible.
	→ On the diamond core drilling machine Use of the water collection system in combination with a wet-type industrial vacuum extractor is mandatory for upward wet drilling.
	→ On the diamond core drilling machine Operate the system only with a fully functional PRCD.

Product information

products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.

• Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.
  Product information

  Diamond core drilling machine	DD 160
  Generation:	02
  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

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.
  

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.
  

Diamond drill safety warnings

• When performing drilling that requires the use of water, route the water away from the operator’s work area or use a liquid collection device. Such precautionary measures keep the operator’s work area dry and reduce the risk of electrical shock.
  
• Operate power tool by insulated grasping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
  
• Wear hearing protection when diamond drilling. Exposure to noise can cause hearing loss.
  
• When the bit is jammed, stop applying downward pressure and turn off the tool. Investigate and take corrective actions to eliminate the cause of the bit jamming.
  
• When restarting a diamond drill in the workpiece check that the bit rotates freely before starting. If the bit is jammed, it may not start, may overload the tool, or may cause the diamond drill to release from the workpiece.
  
• When securing the drill stand with anchors and fasteners to the workpiece, ensure that the anchoring used is capable of holding and restraining the machine during use. If the workpiece is weak or porous, the anchor may pull out causing the drill stand to release from the workpiece.
  
• When drilling through walls or ceilings, ensure to protect persons and the work area on the other side. The bit may extend through the hole or the core may fall out on the other side.
  
• Do not use this tool for overhead drilling with water supply. Water entering the power tool will increase the risk of electric shock.
  

Additional safety instructions

Personal safety

• Do not tamper with or attempt to make alterations to the machine.
  
• The machine is not intended for use by debilitated persons who have received no special training.
  
• Keep the machine out of reach of children.
  
• Do not touch rotating parts. Switch the machine on only after it is in position at the workpiece. Touching rotating parts, especially rotating accessory tools, can result in injury.
  
• Avoid skin contact with drilling slurry.
  
• 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. Contact with or inhalation of the dust can cause allergic reactions and/or respiratory or other diseases among operators or bystanders. Certain kinds of dust such as oakwood and beechwood dust are classified as carcinogenic, especially in conjunction with additives for wood conditioning (chromate, wood preservative). Only specialists are permitted to handle material containing asbestos. Use as effective a dust removal system as possible. To achieve a high level of dust collection, use a suitable vacuum extractor of the type recommended by Hilti for wood dust and/or mineral dust and which is designed for use with this power tool. Make sure that the workplace is well ventilated. It is advisable to wear a respirator appropriate for the type of dust generated. Comply with national regulations applicable to the materials you will be working with.
  
• The diamond core drilling machine and the diamond core bit are heavy. There is a risk of crushing parts of the body. The user and persons in the vicinity must wear suitable protective goggles, a hard hat, ear defenders, protective gloves and protective footwear while the machine is in use.
  

Power tool use and care

• Make sure that the machine is correctly secured to the drill stand.
  
• Always make sure that an end stop is installed on the drill stand as otherwise the safety-relevant end-stop function is not implemented.
  
• Check that accessory tools are compatible with the machine’s chuck/drive system and that they are installed and secured correctly.
  

Electrical safety

• Do not use extension cords with multiple power outlets powering two or more devices in operation at the same time.
  
• Operate the machine only when it is connected to an adequately rated power supply with a ground conductor.
  
• 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. External metal parts of the machine can become live, for example if you inadvertently damage electric wiring. This constitutes a serious risk of electric shock.
  
• Make sure that the supply cord cannot be damaged as the carriage advances.
  
• Never operate the machine without the accompanying PRCD (machines without PRCD: Never operate the machine without an isolating transformer). Test the PRCD each time before use.
  
• Check the machine’s supply cord at regular intervals and have it replaced by a qualified specialist if found to be damaged. If the machine’s supply cord is damaged it must be replaced with a specially prepared and approved supply cord available from Hilti Customer Service. Check extension cords at regular intervals and replace them if found to be damaged. Do not touch the supply cord or extension cord if it is damaged while working. Disconnect the supply cord plug from the power outlet. Damaged supply cords or extension cords present a risk of electric shock.
  
• Never operate the machine when it is dirty or wet. Dust (especially dust from conductive materials) or dampness adhering to the surface of the machine may, under unfavorable conditions, lead to electric shock. Dirty or dusty machines should thus be checked by Hilti Service at regular intervals, especially if used frequently for working on conductive materials.
  

Workplace

• Approval must be obtained from the site engineer or architect prior to beginning drilling work. Drilling work on buildings and other structures may influence the static equilibrium of the structure, especially when steel reinforcing bars or load-bearing components are cut through.
  
• If the drill stand has not been fastened correctly, always move the machine mounted on the drill stand all the way down in order to prevent the stand from falling over.
  
• Keep the supply cord, extension cord, water hose and vacuum hose away from rotating parts of the machine.
  
• Use of the water collection system in conjunction with a wet-type industrial vacuum extractor is a mandatory requirement for wet drilling overhead.
  
• Use of the vacuum securing method without an additional means of fastening is prohibited for drilling in an upward direction.
  
• An additional means of securing the drill stand must be employed when the machine is secured with the vacuum securing method (accessory) for horizontal drilling.
  

Diamond core drilling machine DD 160-U

1. On/Off switch
   
2. Theft protection indicator
   
3. Service indicator
   
4. Drilling performance indicator
   
5. Gear selector
   
6. Gearing section
   
7. Motor
   
8. Carbon brush cover
   
9. Water swivel
   
10. Chuck
    
11. Supply cord with PRCD
    
12. Carriage lock
    
13. Carriage play adjusting screw
    
14. Carriage
    
15. Hand wheel shaft
    
16. Supply cord holder
    
17. Drill stand
    
18. End stop screw
    
19. End stop screw
    

Drill stand

1. End stop screw
   
2. Rail
   
3. Vacuum relief valve
   
4. Pressure gage
   
5. Leveling indicator
   
6. Vacuum hose connector
   
7. Combination base plate
   
8. Grip
   
9. Adjusting lever
   
10. Hole center indicator
    
11. Leveling screw
    
12. Vacuum seal
    

1. End stop screw
   
2. Rail
   
3. Base plate (anchors, small)
   
4. Leveling screw
   

Accessories (optional)

1. Star handle
   
2. Lever
   
3. Depth gage
   
4. Threaded spindle
   
5. Column swivel
   
6. Wheel assembly
   
7. Vacuum base plate
   

1. Holder
   
2. Water collector
   
3. Seal
   

Intended use

The product described is an electrically powered diamond core drilling machine. It is designed for drilling through-holes and blind holes in (reinforced) mineral base materials using a drill stand and the wet drilling technique. Hand-held use of the diamond core drilling machine is not permitted.

The product described is designed for professional use and only trained, authorized personnel are permitted to operate, service and maintain the product. This personnel must be specifically informed about the possible hazards. The product described and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.

• Always use a drill stand when using the diamond core drilling machine. The drill stand must be sufficiently anchored in the base material by an anchor base plate or vacuum base plate.
  
• Do not use a hammer or other heavy object to adjustment the base plate.
  
• Operate the machine only when it is connected to a power supply providing a voltage and frequency in compliance with the information given on its type identification plate.
  
• Comply with national health and safety requirements.
  
• Comply with the safety rules and operating instructions for the accessories used.
  
• To reduce the risk of injury, use only genuine Hilti core bits and accessories.
  

Items supplied

Diamond core drilling machine, hand wheel, operating instructions.
The drill stand is supplied as a separate unit. Other system products approved for use with this product can be found at your local Hilti Store or at: www.hilti.group .

Drilling performance indicator

The diamond core drilling machine has an LED drilling performance indicator.

Symbol	Status	Meaning
	Orange light	Contact pressure too low
	Green light	Contact pressure ideal
	Red light	Contact pressure too high

Service indicator

The diamond core drilling machine has an LED service indicator.

Symbol	Status	Meaning
	Red light Product running	The carbon brushes are badly worn. End of service interval – servicing is due. You can continue working for a number of hours after the indicator first shows, before automatic cut-out is activated. Bring the product to Hilti Service in good time.
	Red light Product not running	The carbon brushes must be replaced.
	Flashing red light	The diamond core drilling machine has overheard or is damaged. See Troubleshooting.

Product properties

Weight	Anchor base plate	35.9 lb (16.3 kg)
	Combination base plate	42.5 lb (19.3 kg)
Dimensions (L×W×H)	Anchor base plate	15.7 in x 37.2 in x 6.5 in (400 mm x 945 mm x 165 mm)
	Combination base plate	24.0 in x 37.5 in x 9.8 in (610 mm x 952 mm x 250 mm)
Rated speed under no load	1st gear	460 /min
	2nd gear	760 /min
	3rd gear	1,690 /min
Protection class		Protection class I (earthed)
Rated power (at 230 V)		2,200 W
Max. permissible water supply pressure		70 psi (5 bar)

Rated voltage

Rated voltage	100 V	110 V GB	110 V TW	120 V	127 V	220 V	230 V	240 V
Rated current input	15 A	16 A	15 A	19.5 A	18.5 A	10 A	10.3 A	9.9 A
AC frequency	50/60 Hz	50/60 Hz	50/60 Hz	60 Hz	50/60 Hz	50/60 Hz	50/60 Hz	50/60 Hz

Using extension cords

Use only extension cords of a type approved for the application and with conductors of adequate gauge.
Recommended minimum conductor cross-sections and maximum power cord lengths:

Conductor cross-section → ↓ Mains (AC) voltage	1.5 mm²	2.5 mm²	3.5 mm²	4.0 mm²
100 V	Not recommended	Not recommended	25 m	Not recommended
110 V	Not recommended	15 m	Not recommended	30 m
127 V	Not recommended	20 m	Not recommended	35 m
220 V	35 m	65 m	Not recommended	105 m
230 V	40 m	70 m	Not recommended	Not recommended
240 V	40 m	70 m	Not recommended	110 m

Use of the machine with various items of equipment

Equipment	Core bit diameter	Drilling direction
Without water collection system without dust removal system	1.0 in … 8.0 in (25 mm … 202 mm)	Not upwards
With water collection system without dust removal system	1.0 in … 6.4 in (25 mm … 162 mm)	Not upwards
With water collection system With dust removal system	1.0 in … 6.4 in (25 mm … 162 mm)	All directions

Gears and corresponding core bit diameters

Gear	Core bit diameter	Idling speed
1	6.0 in … 8.0 in (152 mm … 202 mm)	460 /min
2	2.8 in … 5.6 in (72 mm … 142 mm)	760 /min
3	1.0 in … 2.6 in (25 mm … 67 mm)	1,690 /min

Securing the diamond core drilling machine to the drill stand

1. Remove the end stop screw from the end of the rail.
   
2. Using the opening provided for the purpose, set the diamond core drilling machine on the rail.
   
3. Lock the diamond core drilling machine by fully tightening the carriage lock.
   
4. Check that the diamond core drilling machine is locked by lightly turning the hand wheel.
   
5. Install the end stop on the rail and check that it is secure.
   
   Check carriage play; adjust if necessary.
   

Fitting the hand wheel on the drill stand

1. Pull the black ring back to fit the hand wheel.
   
2. Fit the hand wheel onto the axle.
   

Securing the drill stand with an anchor

1. Set an anchor that is suitable for the base material. Select the distance to suit the base plate used.
   

   Technical data
   Anchor base plate	10.6 in (270 mm)
   Combination base plate	11.4 in (290 mm)

2. Screw the anchor spindle into the anchor.
   
3. Slip the base plate of the diamond core drilling machine over the spindle and align it.
   
4. Screw the clamping nut on to the spindle but do not tighten it.
   
5. Use the leveling screws to level the base plate. Make sure that the leveling screws are firmly seated against the surface.
   
6. Use a suitable open-end wrench to tighten the clamping nut on the clamping spindle.
   
7. Make sure that the diamond core drilling machine is secure.
   

Securing the drill stand by vacuum

1. Turn all the leveling screws until they project approx. 5 mm underneath the base plate.
   
2. Connect the vacuum connector on the vacuum base plate to the vacuum pump.
   
3. Locate the center point of the hole to be drilled. Draw a line from the center of the hole to be drilled in the direction in which the machine is to be positioned.
   
4. Make a mark on the line at the specified distance from the center of the hole to be drilled.
   

   Technical data
   Combination base plate	11.4 in (290 mm)
   Vacuum base plate	11.4 in (290 mm)

5. Switch on the vacuum pump and press and hold down the vacuum release valve.
   
6. Line up the mark on the base plate with the line.
   
7. When the diamond core drilling machine is correctly positioned, release the vacuum release valve and press the base plate against the work surface.
   
8. Use the leveling screws to level the base plate.
   
9. Make sure that the diamond core drilling machine is secure.
   

Fastening the drill stand with the threaded spindle

1. Secure the threaded spindle at the top end of the column.
   
2. Position the drill stand on the work surface.
   
3. Use the leveling screws to level the base plate.
   
4. Secure the drill stand with the threaded spindle and tighten the threaded spindle.
   
5. Check that the drill stand is secure.
   

Adjusting the drilling angle when using the drill stand with combination base plate

1. At the foot of the drill stand, release the adjusting lever until the sliding nuts are disengaged.
   
2. Adjust the column to the desired angle.
   
3. Tighten the adjusting lever until the sliding nuts are fully engaged and the column is again secured in position.
   

Fitting the water connection (accessory)

1. Connect the water flow regulator to the diamond core drilling machine.
   
2. Connect the water supply (hose connection).
   

installing the water collection system (accessory)

1. Remove the screw from the drill stand.
   
2. Install the water collector holder on the drill stand with the screw.
   
3. Position the water collector, with seal and water collector sealing disc installed, between the two movable arms of the water collector holder.
   
4. Press the water collector against the work surface by turning the two screws on the water collector holder.
   
5. Connect a wet-type industrial vacuum extractor to the water collector or establish a hose connection through which the water can drain away.
   

Fitting a diamond core bit in a BI+ chuck

1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
   
2. Open the chuck by turning it in the direction of the "Open brackets" symbol.
   
3. From below, push the diamond core bit into the chuck on the diamond core drilling machine, turning it until the teeth engage.
   
4. Close the chuck by turning it in the direction of the "Closed brackets" symbol.
   
5. Check that the diamond core bit is seated securely in the chuck.
   

Selecting the speed

• While using one hand to turn the core bit, set the switch to the recommended setting.
  

Removing a diamond core bit from a BI+ chuck

1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
   
2. Open the chuck by turning it in the direction of the "Open brackets" symbol.
   
3. Pull the sleeve on the chuck in the direction of the arrow towards the machine. This releases the core bit.
   
4. Remove the core bit.
   

Enabling a diamond core drilling machine with (optional) theft protection system (TPS)

The "Theft Protection System" function (TPS) is an option for the DD 160 diamond core drilling machine. If equipped with this feature, the diamond core drilling machine can be unlocked and readied for operation only through use of the corresponding TPS key.

1. Plug the supply cord of the diamond core drilling machine into the power outlet.
   
2. Press the "I " or "RESET " button on the portable residual current device (PRCD).
   
   • The yellow theft protection indicator LED flashes.
     
3. Hold the TPS key directly against the lock symbol.
   
   • The yellow theft protection indicator LED goes out and the machine is enabled.
     
   If the power supply is interrupted, the diamond core drilling machine remains ready for operation for approximately 20 minutes. If the interruption is longer, the theft protection system has to be deactivated again with the TPS key.
   

Operating portable residual current device (PRCD)

1. Plug the diamond core drilling machine’s mains plug into an earthed/grounded power outlet.
   
2. Press "I" or "RESET" on the portable residual current device (PRCD).
   
   • The drilling performance indicator shows orange.
     
3. Press "0" or "TEST" on the portable residual current device (PRCD).
   
   • The drilling performance indicator goes out.
     

4. Press "I" or "RESET" on the portable residual current device (PRCD).
   
   • The drilling performance indicator shows orange.
     

Operating diamond core drilling machine without a wet-type industrial vacuum extractor

1. Slowly open the water flow regulator until the water flows at the desired rate.
   
   The diamond core drilling machine can be operated with or without water collection system. With the water collection system, the cooling water is drained away through a hose, without the water collection system the water runs off in an uncontrolled manner. For operation with water collection system, first install the water collection system.
   In both applications, upward drilling is not allowed.
   
2. Push the ON/OFF switch to the "I " position.
   
3. Release the carriage lock.
   
4. Turn the hand wheel until the diamond core bit is in contact with the work surface.
   
5. When you start drilling apply only light pressure until the core bit has centered itself and only then, increase the pressure against the working surface.
   
6. Observe the drilling performance indicator.
   
   Initially, the drilling performance indicator shows orange. Optimum drilling performance is achieved when the drilling performance indicator shows green. Reduce the pressure against the work surface if the drilling performance indicator shows red.
   

Operating diamond core drilling machine with a wet-type industrial vacuum extractor

1. Install the water collection system and connect the wet-type industrial vacuum extractor.
   
2. Switch on the wet-type industrial vacuum extractor; do not use automatic mode.
   
3. Slowly open the water flow regulator until the water flows at the desired rate.
   
4. Push the ON/OFF switch to the "I " position.
   
5. Release the carriage lock.
   
6. Turn the hand wheel until the diamond core bit is in contact with the work surface.
   
7. When you start drilling apply only light pressure until the core bit has centered itself and only then, increase the pressure against the working surface.
   
8. Observe the drilling performance indicator.
   
   Initially, the drilling performance indicator shows orange. Optimum drilling performance is achieved when the drilling performance indicator shows green. Reduce the pressure against the work surface if the drilling performance indicator shows red.
   

Using the Rota-Rail (column swivel)

The Rota-Rail allows quick and easy access to the hole or core being drilled, with no need to partly or fully dismantle the system.

1. Lock the carriage with the carriage lock. Check to ensure that it is securely fastened.
   
2. Remove the end stop screw from the rear section of the column.
   
3. Secure the Rota-Rail so that the toothed racks are facing the same direction.
   
4. Tighten the screw on the Rota-Rail.
   
5. Release the carriage lock and run the carriage on to the Rota-Rail.
   
6. Slacken the securing screws of the Rota-Rail and pivot the machine with the Rota-Rail to the left or right. This will give you access to the drill hole.
   
7. Remove the core or change the core bit.
   
8. With the Rota-Rail, pivot the machine back to its original position and tighten the securing screws of the Rota-Rail.
   
9. After removing the Rota-Rail, refit the end stop screw to the end of the rail.
   

Switching off the diamond core drilling machine

1. Connect the water flow regulator to the diamond core drilling machine.
   
2. Remove the diamond core bit from the hole.
   
3. Lock the diamond core drilling machine with the carriage lock.
   
4. Switch off the diamond core drilling machine.
   
5. Switch off the wet-type industrial vacuum extractor, if used.
   

Procedure in the event of the core bit jamming

If the bit jams the safety clutch disengages. The electronic control system then switches the motor off and subsequently on again; this is done twice without manual intervention by the user. If this does not free the core bit, the electronic control system switches the motor off for 90 seconds. You can free a jammed bit manually, as follows:

Using an open-end wrench to free the core bit

1. Unplug the supply cord from the power outlet.
   
2. Grip the diamond core bit with a suitable open-end wrench close to the connection end and turn the diamond core bit to free it.
   
3. Plug the supply cord into the power outlet.
   
4. Resume the drilling operation.
   

Using the hand wheel to free the core bit

1. Unplug the supply cord from the power outlet.
   
2. Free the core bit from the base material by turning the hand wheel.
   
3. Plug the supply cord into the power outlet.
   
4. Resume the drilling operation.
   

Removal of the diamond core drilling machine

1. Unplug the supply cord from the power outlet.
   
2. Remove the diamond core bit from the BI+ chuck.
   
3. Remove the core, if necessary.
   
4. Remove the diamond core drilling machine from the working surface.
   
   If you remove the system as a complete unit, after setting it down it is advisable to run the machine all the way down the rail until the core bit is in contact with the floor. This will help prevent the diamond core drilling machine from toppling over.
   

Care and maintenance

Care

• Carefully remove any dirt that may be adhering to parts.
  
• 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 may attack the plastic parts.
  

Maintenance

• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
  
• 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.
  

Care of diamond core drilling machine

• Do not use a spray, pressure jet washer or running water for cleaning.
  
• Prevent unnecessary exposure of the battery to dust or debris and never subject the battery to soaking moisture (e.g., submerged in water or left out in the rain).
  
• Clean the chuck and the clamping segments with a cloth at regular intervals and lubricate the parts with Hilti lubricant spray.
  
• Remove all particles of foreign matter from the chuck.
  
• Occasionally remove the filter from the water inlet in the side handle and flush the filter mesh with water in the direction opposite to the normal water flow.
  
• Remove and clean the water flow rate indicator as soon as it is dirty.
  
• Do not use abrasive cleaning agents or sharp objects to clean the sight glass.
  

Transport and storage

Transport

• Do not transport this product with an accessory tool installed.
  
• Make sure that the equipment is held securely throughout all transport operations.
  
• After transporting, always check all visible parts and controls for signs of damage and make sure that they all function correctly.
  

Storage

• Always store this product with the electric supply cable unplugged from the electricity supply.
  
• Store this product in a dry place, where it cannot be accessed by children or unauthorized persons.
  
• After a long period of storage, always check all visible parts and controls for signs of damage and make sure that they all function correctly.
  

Troubleshooting table