HILTI DGH 150 Concrete Grinder User Guide

HILTI DGH 150 Concrete Grinder User Guide

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

DANGER
Draws attention to imminent danger that will lead to serious personal injury or fatality.

WARNING
Draws attention to a potential threat of danger that can lead to serious injury or fatality.

CAUTION
Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the equipment or other property.

Symbols in the operating instructions

The following symbols are used in these operating instructions:

| 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:

2

| These numbers refer to the illustrations at the beginning of these operating instructions.
---|---

3

| The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text.

11

| Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
| These characters are intended to specifically draw your attention to certain points when handling the product.

Product-dependent symbols

Symbols on the product

The following symbols can be used on the product:

| Wear eye protection
---|---
| Wear a hard hat
| Wear ear protection
| Wear protective gloves
| Wear light respiratory protection
| Wear protective clothing
| Risk of electric shock.
| Risk of crushing parts of the body.
| Warning: Hot surface

RPM

| Revolutions per minute

n

| Rated speed
| Diameter
| Alternating current
| Protection class II (double-insulated)
| The power tool supports near-field communication (NFC) technology, which is compatible with iOS and Android platforms.
| Use the side handle
| If applied on the product, the product has been certified by this certification body for the US and Canadian markets according to the applicable standards.

Product information

 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.

Declaration of conformity

The manufacturer declares, on his sole responsibility, that the product described here complies with the applicable legislation and standards. A copy of the declaration of conformity can be found at the end of this documentation.

The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | D-86916 Kaufering, Germany

Safety

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 ahazardous 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.

Safety warnings for all operations

Safety warnings common for grinding or sanding operations:

• This power tool is intended to function as a grinder or sander. 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.
• Operations such as wire brushing, polishing, hole cutting or cutting-off are not to be performed with this power tool. Operations for which the power tool was not designed may create a hazard and cause personal injury.
• Do not convert this power tool to operate in a way which is not specifically designed and specified by the tool manufacturer. Such a conversion may result in a loss of control and cause serious personal injury.
• Do not use accessories which are not specifically designed and specified by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation.
• The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
• The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be adequately guarded or controlled.
• The dimensions of the accessory mounting must fit the dimensions of the mounting hardware of the power tool. Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.
• Do not use a damaged accessory. Before each use inspect the accessory such as abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during this test time.
• Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various applications. The dust mask or respirator must be capable of filtrating particles generated by the particular application. Prolonged exposure to high intensity noise may cause hearing loss.
• Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment. Fragments of workpiece or of a broken accessory may fly away and cause injury beyond immediate area of operation.
• Hold the power tool by insulated gripping surfaces only, 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.
• Position the cord clear of the spinning accessory. If you lose control, the cord may be cut or snagged and your hand or arm may be pulled into the spinning accessory.
• Never lay the power tool down until the accessory has come to a complete stop. The spinning accessory may grab the surface and pull the power tool out of your control.
• Do not run the power tool while carrying it at your side. Accidental contact with the spinning accessory could snag your clothing, pulling the accessory into your body.
• Regularly clean the power tool’s air vents. The motor’s fan will draw the dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.
• Do not operate the power tool near flammable materials. Sparks could ignite these materials.
• Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.

Kickback and related warnings

Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding.
For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the wheel that is entering into the pinch point can dig into the surface of the material causing the wheel to climb out or kick out. The wheel may either jump toward or away from the operator, depending on direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and / or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.

• Maintain a firm grip with both hands on the power tool and position your body and arms to allow you to resist kickback forces. Always use auxiliary handle, if provided, for maximum control over kickback or torque reaction during start-up. The operator can control torque reactions or kickback forces, if proper precautions are taken.
• Never place your hand near the rotating accessory. Accessory may kickback over your hand.
• Do not position your body in the area where power tool will move if kickback occurs. Kickback will propel the tool in direction opposite to the wheel’s movement at the point of snagging.
• Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.
• Do not attach a saw chain woodcarving blade, segmented diamond wheel with a peripheral gap greater than 10 mm or toothed saw blade. Such blades create frequent kickback and loss of control.

Safety warnings specific for sanding operations:

Use proper sized sanding disc paper. Follow manufacturers recommendations, when selecting sanding paper. Larger sanding paper extending too far beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc or kickback.

Additional safety instructions

Personal safety

• Do not tamper with or attempt to make alterations to the device.
• Keep the grips dry, clean and free from oil and grease.
• Make sure that the side handle is fitted correctly and tightened securely. Always hold the tool firmly with both hands on the grips provided.
• Take breaks between working and do relaxation and finger exercises to improve the blood circulation in your fingers.
• The power tool is not intended for use by debilitated persons who have received no special training.
• Keep the power tool out of reach of children.
• Do not touch rotating parts. Switch the power tool on only after it is in position at the workpiece. Touching rotating parts, especially rotating accessory tools, can result in injury.
• Grinding can produce hazardous grinding dust. Before starting work, check the hazard class of the dust that will be produced by grinding operations. When working with the power tool, whenever possible use a dust extractor 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. 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 a dust extractor whenever possible. To achieve a high level of dust collection, use a suitable dust extractor. If necessary, wear a respirator appropriate for the type of dust generated. Make sure that the workplace is well ventilated. Comply with national regulations applicable to the materials you will be working with.
• Before starting grinding work, carefully remove all protruding parts such as nails, screws, etc.
• Grinding can produce flying sparks. Make sure that no-one is endangered.

Power tool use and care

Always before starting work, and this also applies after each break, check that the accessory tool is secure.

Electrical safety

• 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 on the power tool can become live, for example if you inadvertently damage electric wiring. This presents a serious risk of electric shock.
• 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.
• Have dirtied or dusty power tools that are used frequently for working on conductive materials checked at regular intervals by Hilti Service. Dust (especially dust from conductive materials) or dampness on the surface of the power tool can, under unfavorable conditions, lead to electric shock.

Personal safety

• Make sure that the workplace is well ventilated. It is advisable to wear a filter class P2 dust mask.
• The diamond cup wheel, parts of the guard or the power tool (gear head) can become hot in use. To avoid burns, do not touch these parts unless you are wearing gloves.

Description

Product overview

1. Side handle
2. Clamping lever, side handle
3. Supply cord
4. Release buttons, bow grip
5. Height adjustment of the guard
6. Adjusting lever for segment opening
7. Segment opening
8. Guard with lamellar seal
9. Mounting flange
10. Diamond cup wheel
11. Keyless quick-action clamping screw
12. On/off button
13. Locking button for continuous operation
14. LED status indicator
15. Buttons for gear selection
16. Gear indicator
17. Connector for dust extraction

Intended use

The product described is an electrically powered diamond grinder for dry- grinding and fine-grinding mineral materials. Use the diamond grinder only in combination with a dust extractor.
The grinder is designed exclusively for dry abrasive removal of uncoated mineral materials and thin coatings on concrete and similar mineral materials, with a maximum layer thickness of 3 mm (0.12 in).

Inadmissible misuse

Do not use accessory tools that are not approved for this product. This includes cut-off wheels, diamond cut-off wheels and rotary wire brushes.
Do not use the product for wet grinding, do not grind projecting objects such as nails or screws.
Do not use the product with if slats on the dust hood are worn; never use the product without a dust extractor.
Never use the grinding pad at a speed for which it is not approved.
Static electricity can disable the product’s electronics. Use an anti static suction hose in order to avoid electrostatic effects.

Items supplied

Grinder, operating instructions, mounting flange, Keyless quick-action clamping screw.
Other system products approved for use with this product can be found at your local Hilti Store or at:
www.hilti.group

Technical data

For rated voltage, rated current, frequency and/or input power, refer to the country-specific type identification plate.

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

Noise information and vibration values in accordance with EN 62841

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 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

Vibration information

Preparations at the workplace

Risk of injury! Inadvertent starting of the product.
Unplug the supply cord before making adjustments to the power tool or before changing accessories.

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

Installing an accessory tool

Risk of damage and risk of injury due to damaged Keyless quick action clamping screw. The Keyless quick-action clamping screw can snap off if it is overtightened.
Never use a tool to tighten the Keyless quick-action clamping screw. Tighten it by hand only.

1. Clean the chuck.
2. Slip the mounting flange on to the arbor and turn the mounting flange until it engages.
3. Position the accessory tool on the centering collar of the mounting flange.
4. Screw the quick-action clamping screw into the arbor and tighten the screw by hand.

Removing the accessory tool

1. Slacken the clamping nut.
2. Remove the accessory tool.

Adjusting the side handle

1. To release the side handle, open the clamping lever.
2. Adjust the side handle to the desired position.
3. Close the clamping lever.

Adjusting the guard

Situation: The grinder is switched off.

1. Set the grinder on the grinding wheel.
2. Use the height adjuster to adjust the height.
   • Optimum height: approximately 1 mm clearance between slats and surface.
3. If you are working along a corner, turn the segment opening of the guard to the desired position.
4. Be sure to close the segment opening when you finish working along the corner.

Selecting the gear

1. Use the gear selector switch to select a gear to suit the accessory tool you are going to use and the hardness of the material to be worked.
   You can select a gear only when the power tool is connected to the electricity supply.

2. Use 1st gear for better dust control when grinding off soft mineral materials, such as paint from cement rendering, and to make the power tool easier to guide when grinding off coatings from soft materials.

3. Use 5th gear to apply the full power of the tools when grinding hard mineral materials such as concrete, floor screeding or natural stone.

Types of work

Switching on

Risk of injury. Inadequately secured accessory tools can work loose.
Before each use, always check that the accessory tool is secure.

1. Connect the grinder to an industrial vacuum cleaner.
2. Lift the power tool clear of the work surface.
3. Press and hold down the on / off switch.
   • The status LED of the locking button flashes.
4. Press the locking button to switch on the grinder in continuous operation mode.

The locking button has to be pressed within one second.

Trying out after fitting a new diamond cup wheel

Risk of injury! Damaged grinding wheels can work loose.

• Protect the grinding wheels from blows, impacts and grease.
• Do not use vibrating grinding wheels
• Allow the grinder to run for at least 1 minute without load.

Sanding

1. Select a gear. → page 21
2. Switch the grinder on. → page 21
3. Bring the power tool with the accessory tool into contact with the work surface and keep the tool moving with a steady back-and-forth action.
4. Apply moderate pressure and do not dig the tool into the material.
5. The diamond cup wheel can overheat and suffer damage when used to grind very hard mineral materials such as concrete with a high gravel content. Under these circumstances take frequent breaks from grinding and, with the power tool idling, allow the diamond cup wheel to cool down briefly.

Switching off

To switch off the power tool, press the locking button or the on/off switch.

Care and maintenance

Electric shock hazard! Attempting care and maintenance with the supply cord connected to a power outlet can lead to severe injury and burns.
Always unplug the supply cord before carrying out care and maintenance tasks.

Care

• Carefully remove stubborn dirt from the tool.
• 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 they can attack the plastic parts.

Maintenance

Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including burns.
Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical specialists.

• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all function correctly.
• Do not 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: www.hilti.group.

Cleaning the guard and the suction channel

1. Remove the accessory tool. → page 21
2. Remove the mounting flange from the arbor.
3. Set the lever for height adjustment to the midway position.
4. Press both release buttons and work the bow-shaped retainer forward to remove.
5. Pull the guard down and clear of the power tool.
6. Remove the suction channel from the connector.
7. Clean the guard, the suction channel and the connector.
8. Connect the suction channel to the connector. Make sure that the O-ring is correctly seated.
9. Connect the guard to the suction channel. Make sure that the O-ring is correctly seated. Slip the guard over the arbor and into the power tool.
10. Secure the guard with the bow-shaped retainer. Make sure that the bow-shaped retainer engages correctly.
11. Install the accessory tool.

Changing the grinding slats

Change the grinding slats when they are worn.

1. Remove the accessory tool. → page 21
2. Pull the grinding slats out of the guard. Use pliers if necessary.
3. Press the new grinding slats into the groove in the guard until they engage.
4. Install the accessory tool.

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.

Further information

For more information on operation, technology, environment and recycling, follow this link:
qr.hilti.com/manual/?id=2240961
This link is also to be found at the end of the documentation, in the form of a QR code.

Disposal

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.

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.

EC Declaration of Conformity UK Declaration of Conformity

Manufacturer:
Hilti Corporation FeldkircherstraBe 100 9494 Schaan I Liechtenstein

UK Importer:
Hilti (Gt. Britain) Limited 1 Trafford Wharf Road, Old Trafford Manchester, M17 1BY

Serial Numbers: 1-99999999999

2006/42/EC I Supply of Machinery (Safety) Regulations 2008 2011/65/EU I The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 2014/30/EU I Electromagnetic Compatibility Regulations 2016

EN 60745-1:2009 +A11:2010
EN 55014-1:2017 +A11:2020
EN 61000-3-2:2019
EN 60745:-2-3:2011 +A2:2013 +A11:2014 +Al2:2014 +A13:2015
EN 55014-2:2015
EN 61000-3-3:2013 +A1:2019

Dr. Tahar Zrilli Head of Quality and Process Management Business Area Electric Tools & Accessories

Schaan, 29.09.2021

Johannes Wilfried Huber Senior Vice President Business Unit Diamond

Hilti Corporation
LI-9494 Schaan
Tel.:+423 234 21 11
Fax:+423 234 29 65
www.hilti.group

References

• HILTI Country selector
• HILTI Country selector
• Главная страница - Hilti Россия

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