DENZEL AG115-750 Angle Grinder User Manual

DENZEL AG115-750 Angle Grinder

PROPER USAGE AND GENERAL INFORMATION

• Angle grinder (hereinafter «machine», «tool») is designed to perform cutting, grinding, stripping operations with metal structures or blanks using special abrasive discs and brushes. Subject to certain conditions an application for processing of a stone, concrete, a brick is possible.
• The tool is designed for usage at an environment temperature from 0 °С to 40 °С, relative humidity not more than 80% and absence of direct exposure of atmospheric condensation and excessive air dustiness.
• The machine is suitable only for private use and must be used in intermittent duty not more than 20 hours per month. It is recommended to use on-loading not more than a nominal, during 10-15 minutes and then to have a break for 20-30 minutes. This usage mode enables to complete domestic tasks effectively and prevents the tool from a premature coming out of order.
• This manual contains the information and the requirements necessary and sufficient for a sure, effective and secure use of the tool.
• Due to ongoing activities in order to improve the tool the manufacture reserves the right to make minor changes in its construction, not mentioned in this manual and not worsening its consumer and operational properties, effective and secure use.

ACCESSORIES

Contents of delivery:

1. Angl grine der
2. Side hand le
3. Special key
4. Set of spare carbon brushes
5. Instruction manual
6. Warranty card

SPECIFICATIONS

Parameter

| Value
---|---
AG-115- 750| AG-125- 1100
Maximum disc diameter, mm| 115| 125
No load speed, min-1| 11000| 3000-11000
Rated input power, W| 750| 1100
Voltage, V| 230| 230
Frequency, Hz| 50/60| 50/60
Electronical speed control| No| Yes
Spindle thread| М14| М14
Constant speed control| No| Yes
Soft start| No| Yes
Protection against accidental switch on| Yes| Yes
Lock on switch| Yes| Yes

Parameter

| Value
---|---
AG-115- 750| AG-125- 1100
Degree of protection against penetration of objects and liquids| IP20| IP20
Sound pressure level (LpA), dB| 85| 84
Vibration level (ah), м/с2| 5,4| 5,3
Degree of protection against electric shock| II| II
Net weight, kg| 1,75| 2,0
Gross weight, kg| 2,0| 2,2

SAFETY WARNINGS

The following definitions indicate the degree of importance of each keyword. Read through the instructions and pay attention to these symbols.

• WARNING! Indicates a potentially hazardous situation which, if not avoided, could result in injury or equipment damage.
• Electric Shock Risk!
• Flammability!
• ATTENTION: Read the manual attentively in order to reduce the risk of injury.

GENERAL SAFETY INSTRUCTIONS FOR ELECTRIC TOOLS

WARNING!
Before starting work read all safety information and instructions. Non- observance to the safety rules and instructions may lead to electric shock, fire and/or severe injury.

Keep all safety instructions for subsequent use
The term «power tool» refers to your electric (with cable) or battery power (wireless) tool in all the instructions below.

Workplace safety

• a) Keep the workplace clean and provide it with good light. Poor light or mess at workplace may lead to an accident.
• b) Do not use power tools if there is a danger of fire or explosion, for example, near flammable liquids, gas or dust. During work electric tools give up sparks, which can ignite dust or flammable vapors.
• c) While working with power tools do not keep close children or other people. A distraction may cause loss of control over the work.

Electrical safety

• a) A cable plug of an electric tool must match a power outlet. Never modify an electrical cable plug. Do not use connecting adapter plugs, if there is a ground wire in the power cable of the electric tool. Usage of the original cable plug and a corresponding power outlet reduces the risk of electric shock.
• b) While working with electric tool avoid physical contact with grounded objects such as pipelines, radiators, electric stoves and refrigerators. The risk of electric shock increases if your body is grounded.
• c) Do not use electric tool in the rain or in a humid environment. Water entering into the electric tool increases the risk of electric shock.
• d) Handle electrical cable with care. Never use the cable for carrying electric tool or pulling its plug out of the receptacle. Do not expose electrical cable to high temperatures and lubricants; keep it away from sharp edges and moving parts of the tool. Damaged or entangled cable increases the risk of electric shock.
• e) While working with electric tool outdoors use an extension cable intended for outdoor use. Using the cable suitable for working outdoors reduces the risk of electric shock.
• f) While working with electric tool in a humid environment use a power supply equipped with a safety protective shutdown device. The usage of this device reduces the risk of electric shock.

Personal safety

• a) While working with electric tools be careful, watch what you do and use common sense. Do not use electric tool if you are tired, as well as being under the influence of alcohol or drugs lowering the reaction and other remedies. The slightest negligence may cause serious injury while working with electric tools.
• b) While working use personal protective equipment. Always wear safety glasses. Timely using of protective equipment such as: dust mask, boots with non-slip sole, safety hat or noise protection headphones, significantly reduces the risk of injury.
• c) Do not allow unintended start. Before plugging in electric tool and/or connecting it to the battery lift or move it, be sure the switch is in the «off» position. Do not carry electric tool with the trigger switch pressed and do not plug the electric tool into a power outlet if the switch is set to «on». This may lead to an accident.
• d) Before turning on the electric tool remove from it all adjusting keys or spanners. An adjusting key or spanner left fixed on the rotating part of the electric tool can cause severe injury.
• e) Work in a steady posture. Always keep your balance and a steady posture. This will allow you not to lose control when working with electric tool in an unexpected situation.
• f) Dress properly. Do not wear loose clothes or jewelry while working. Make sure your hair, clothing or gloves are at a constant distance from the rotating parts of the tool. Loose clothes, jewelry or long hair can get into the rotating parts of the tool.
• g) I f the electric tool is equipped with a dust collection and removal device, make sure this device is properly connected and used. The use of a dust removal device significantly reduces the risk of an accident due to a dusty working space.

Use of electric tools and technical care

• a) Do not overload the electric tool. Use your tool for its intended purpose. The electric tool works safe and secure only if you keep to the parameters specified in its technical specifications.
• b) Do not use the electric tool if its switch cannot be set to the «on» or «off» position. Electric tool with a broken switch is dangerous and must be repaired.
• c) Unplug the electric tool from the power outlet and/or remove battery before adjusting, replacement of accessories or when storing electric tool. Such precautions reduce the risk of an accidentally turning on of the electric tool.
• d) Store unused electric tools out of the reach of children and do not let persons who are not familiar with electric tool or these instructions work with electric tools. Electric tools are dangerous in the hands of inexperienced users.
• e) Check an electric tool regularly. Check alignment accuracy and ease of movement of moving parts, integrity of parts and any other elements of the electric tool affecting its work. Do not use a broken electric tool until it is completely repaired. Most accidents are the result of insufficient maintenance of the electric tool.
• f) Watch out for sharpness and cleanness of cutting accessories. Sharp-edged accessories allow avoiding jamming and make work less tiring.
• g) Use electric tool and accessories in accordance with this manual and taking into account the working conditions and nature of future work. Misuse of the electric tool can create a hazardous situation.

Maintenance

• a) Your electric tool must be repaired only by qualified specialists using original spare parts. This will ensure safety and reliability of your electric tool in further use.

Additional Security Rules when working with Angle Grinder General warning instructions for grinding

• a) Angle grinders are designed for grinding with abrasive wheels, sandpaper, for works with wire brushes and as a detachable grinder. Observe all warnings and instructions that you get with a power tool. Failure to follow directions may result in electric shock, fire and / or serious injury.
• b) Do not use tooling or accessories which are not provided by the manufacturer specifically for this type of tool and not recommended by the manufacturer. Only physical ability to attach a tooling on your power tool does not guarantee its safe and reliable use.
• c) Allowable tooling speed must be at least the maximum number of rotation speed specified on the electric machine. Tooling, rotating with greater than acceptable speed, may tear off and cause serious injury.
• d) The outer diameter and thickness of the tooling must match the size of your electric machine. Tooling of the wrong size cannot be safe to operate and properly monitored.
• e) Grinding wheels, flanges, grinding plates or other accessories must fit tightly on the spindle of your electric machine. Tooling, mounted on the spindle with backlash, leads to strong vibration and loss of control over the machine.
• f) Do not use damaged tooling to avoid serious injury. Each time before use check grinding wheels for chips and cracks, grinding plates for cracks, risks or heavy wear, wire brushes on loose or broken elements.
• g) Use personal protective equipment. Depending on the work performed use a face shield, eye protection or protective glasses. If necessary, use a dust respirator, hearing protection, protective gloves or a special apron, which protects against sparks, abrasive particles and material particles.
• h) Ensure that unauthorized persons are at a safe distance from the work area. Shards of parts or tooling, in case of its rupture, can fly to the side and cause injury even at a considerable distance from the work site.
• i) Hold the electric machine only on the insulated surface of the handles if you are doing work, in which the equipment can get on the hidden wiring or own power cord. Contact with a current-carrying wire puts under voltage all metal parts of the electric tool and leads to electric shock.
• j) Keep the power cord away from the rotating tooling. If you lose control of your electric machine, the power cord may be cut or grabbed by the rotating tooling.
• k) Never let an electric machine out of your hands, until the tooling stops completely. Rotating tooling can catch on supporting surface or other object and, as a result, you may lose control of the electric machine.
• l) Regularly clean the vents of the electric machine. The engine fan draws dust into the case and large amounts of metallic dust can cause the tool to fail.
• m) Do not use accessories that require the use of coolants. The use of water or other coolants can cause damage to the electric machine and electric shock.
• n) Hold the electric machine tight and take a position in which you can counteract the reverse forces. Always use the extra handle to best counteract reverse forces or the reactionary moment of recruitment.
• o) Be especially careful on corners, sharp edges, etc. Prevent a tooling bounce from the workpiece and its jamming. A possible rebound and jamming of the tooling causes loss of control or kickback.
• p) When processing stone, use dust suction. The vacuum cleaner must be adapted to work with stone dust. Using these devices reduces the risk of exposure to dust.

Special warnings for grinding and cutting

• a) Use abrasive tools recommended exclusively for your electric machine and protective covers provided for them. Abrasive tools not provided for this electric machine may not be safe enough.
• b) The protective cover must be securely fastened to the electrical machine and configured to achieve the highest degree of security, it means, in the direction of the operator should be open as little as possible part of tooling. The protective cover should protect the operator from splintering and accidental contact with the tooling.
• c) Abrasive tools may only be used for their intended purpose. Never sand by the side of the cutting disc. Cutting discs are designed for cutting material by edge. Other use of the circle may lead to its destruction and injury.

Additional special warnings instructions for grinding and cutting

• a) Prevent blocking of the cutting wheel, do not exceed the pressing force. Do not perform too deep cuts. Overload of the cutting wheel increases the probable tilting or blocking and this increases the risk of a kickback or a tooling break.
• b) Be especially careful when cutting with a cutting wheel in the direction away from you. In case of a back kick power tools with a spinning circle can bounce right at you.
• c) When jamming the cutting wheel turn off the electric tool and hold it until the wheel stops. Never try to remove the rotating cutting wheel from the cut, as this may cause a back kick. Establish and eliminate the cause of jamming.
• d) Do not turn the electric tool on again, if the tooling is in the workpiece. Let the cutting wheel develop the full speed, before you continue cutting carefully. Otherwise, the disc may jam which will cause a kickback.
• e) Plates or large workpieces must lie securely on the support to reduce the risk of jamming of the cutting disc. Consider that large workpieces can sag under their own weight.

Special warnings when sanding
Do not use oversized sanding sheets, and follow the manufacturer’s specifications for sanding sheets. Sanding sheets protruding over the edge of the sanding pad can cause injury and blockage, tear or cause kickback.

Special warnings for working with wire brushes

• a) Keep in mind that wire brushes lose elements during normal operation. Do not overload the brushes with excessive pressing force. Flying pieces of wire can easily penetrate clothing and injure the operator.
• b) I f for work it is recommended to use a wheel protective cover, then exclude the contact of the wire brush with the casing. Consider that dish and cup brushes can increase its diameter while rotation under the action of centrifugal forces.

Residual risks
In spite of the compliance with relevant security means instructions and use of safety devices, some residual risks cannot be completely eliminated. They are:

• Injuries caused by touching hot or rotating tool parts or workpiece.
• The possibility of ignition of some materials under the influence of sparks when grinding.
• Impairment of hearing.
• Risk of pinching fingers when changing working tool.
• Damage to health due to vibration appearing at.
• Damage to health due to inhalation of dust when working with stone, concrete and bricks.
• Damage to health due to long observation of sparks generated by grinding.

HANDLING INSTRUCTIONS

General view of the tool is shown on picture 1.

1. Gear housing.
2. Spindle lock button.
3. Engine housing.
4. Switch.
5. Speed control (for model AG-125-1100).
6. Power cable.
7. Side handle.
8. Protective cover.
9. Protective cover fastening lever.
10. Tooling (not included).

Description

Angle grinding machine represents rotary action machine consisting of electric drive and angular gear, on the output shaft of which the possibility of fixing the tooling is provided. The electric drive is the collector AC motor, housed in a plastic case.
The machine is designed to work with grinding or cutting wheels, as well as a stripping tool (metal/ nylon cup and disk brushes, petal grinding heads, etc.) with a working speed of at least 80 m/s.
The machine is equipped with a protective cover that protects the operator from sparks flying out of the treatment area of wear products of equipment and injuries at destruction of equipment. Work without the use of a protective casing is strictly prohibited for safety reasons.

OPERATION

ATTENTION! Always unplug the power cord from the power supply before preparing for the operation, setting up, and maintenance of the power tool.

Installing a protective cover

ATTENTION!
The disc guard must be installed on the instrument in this way so that the closed side of the cover is always towards the operator.

To install the cover is necessary:

• move the cover locking lever 9 (pic. 1) to the side loosening the clamp
• install a protective cover on the seat of the gearbox cover so that no sparks are ejected towards the operator
• to rotate adjusting nut of the cover clamp to adjust the size of the clamp according to the size of the seat, so that to ensure the possibility of free rotation of the cover on the seat.
• tighten the protective cover with the locking lever. At the same time the cover must be securely fixed in its seat excluding its turn during work. Avoid applying excessive force to the lock lever, if necessary correct the tension with the adjusting nut of the yoke.

Installing the side handle

ATTENTION!

• You should always use the side handle supplied with the tool. Losing control of the tool while working may cause injury.
• Always check that the side handle is secure before work.
  • Screw the handle 7 into the threaded hole in the gear housing in a comfortable position.

Installation / removal of tooling

At installation / removal of the tooling a spindle lock is carried out by the key 2 located on the gearbox housing. The spindle can also be locked with a wrench S17.
Fastening the tooling onto the spindle is carried out with the help of a flange and a nut tightened with a special key supplied in the set. The tooling with a threaded bore М14 fastens directly onto the threaded end of the spindle.

ATTENTION!
In order to avoid machine breakdown and injury it is not allowed to press the lock button of the spindle 2 during the operation of the grinding machine, as well as till the full stop the spindle after turning off the engine.

Main connection

ATTENTION! Power tools should only be connected to single-phase AC power, the voltage of which corresponds to the voltage indicated on the rating plate located on the tool housing. If the rating plate indicates a voltage of 230V, then the power tool can also be switched on to a main with a voltage of 220 V.

• When working outdoors use industrial extension cords intended for outdoor use. Do not use homemade extensions. When working outdoors connect power tools to the power circuit equipped with a differential automatic with a response current of not more than 30 мА, this will reduce the risk of electric shock.
• When connecting ensure that the insulation of the electrical cable and the power plug of the machine is intact. Make sure the machine’s power switch is in the «off» position.This power tool can be connected to power outlets that do not have a protective ground, since it has double insulation (protection class II).

Spindle speed adjustment (for model AG-125-1100)

Depending on the type of tooling used, the type of material being processed and the nature of processing you can choose the optimal spindle speed of the machine. The selection is made using the controller 5 (pic. 1). The numbers on the regulator ring correspond to the ring positions and do not indicate a specific speed, expressed in rotations per minute. A higher number corresponds to a higher spindle speed and tooling.

ATTENTION!
The machine is not intended for polishing work.

ATTENTION!
Do not overload the machine operating at reduced speeds. When the engine rotor speed decreases, the cooling of the machine deteriorates.

Before using you must:

• inspect and verify its completeness and no external damage;
• make sure the power switch works correctly;
• after transportation in winter conditions before turning on, leave at room temperature until complete drying of water condensate.

Before getting started, you must:

• set the handles and protective cover in a convenient for work position;
• check the tightness of the threaded connection of fixing the tooling;
• turn the spindle with a tooling by hand: his move must be free without jams;
• try the machine at idle (also after replacing the grinding wheel);
• make sure that the power switch is in the «off» position, then connect the machine to the mains.

To turn on the machine, it is necessary to turn the switch 4 into the On / 1 position. If necessary, the power switch 4 can be locked in the «on» position, to do this, move the key to the «on» position and click on the front edge of the key, the protrusion on which will engage with the groove in the housing and the key will be fixed. To turn off the machine, press the back edge of the key.
Recommendation: Try the switch key lock mechanism before connecting the machine to the mains.

ATTENTION!
The protective cover should always be installed during operation. Always use safety glasses.

While working:

• after turning on the engine, let the machine develop the set speed of the tooling and only after that you enter the tooling and the workpiece into contact.
• always use the machine only for the types of work for which it is intended. When processing wood, use only the designated tooling, safety of use of which on an angle grinder, no doubt.

ATTENTION!
Never use saw blades designed for circular saws on angle grinders. It is extremely dangerous!

• do not allow mechanical damage, shock, falling of the tool on hard surfaces, etc.;
• protect the machine from exposure to intense heat sources or chemically active substances, as well as from the ingress of liquids and foreign solid objects inside the machine;
• ensure effective removal of processing products from the cutting zone;
• do not block or obstruct the ventilation openings in the machine case;
• turn the machine off using the power switch before connecting / disconnecting power;
• monitor the condition of the tooling and the heating of the electric motor;
• do not allow pressing the spindle lock button 2 during operation – this will instantly lead to machine breakdown and operator’s injury.

At the end of the work:

• disconnect the tool from the mains, making sure the switch is in the «off»;
• clean the Angle Grinder and accessories from dirt.

Recommendations for use

• Before you start processing a part, you must secure it, if it has a light weight.
• For maximum grinding performance angle formed by the abrasive wheel and the surface to be treated should be between 30 – 40 degrees. Move the machine smoothly along the surface to be treated. Thus, the overheat and change of color of the processed surface is excluded, processing quality is improved.

ATTENTION!
Never use a cutting wheel for grinding.

When cutting with a cutting wheel do not put pressure on the handles of a power tool, tilt power tool. Avoid vibration and tilting disc. It is necessary to work carefully, taking into account the characteristics of the material being processed. It is very important to consider the direction of movement of the power tool. Power tools must be moved against the rotation of the disc; otherwise, there is a risk of losing control of the power tool.
When cutting profiles and rectangular pipes it is recommended to start cutting from the narrower end.
Do not overheat the exterior of the machine during prolonged use. If overheated, stop working, let the machine work without load for 1 … 2 minutes to cool the engine, turn off the engine and take a break to cool down the gear housing.
Do not allow the machine to work when there is unwanted or unusual noise in the engine or mechanism. If noise appears, turn off the machine and contact an authorized service.

NOISE AND VIBRATION

Noise and vibration characteristics are given in the table №1.
However, if the Angle Grinder will be used for other work with the use of working tools, not provided by the manufacturer, or maintenance will not meet the requirements, then the vibration level may be different.

ATTENTION!
Always use personal ear protection.

MAINTENANCE

ATTENTION!
Before starting maintenance and adjustment of the Angle Grinder unplug the power cord from the power outlet. To ensure quality and safe functioning keep your tool and vents clean at all times.

• I f you notice a decrease in the frequency of rotation of equipment or extraneous noise during operation, it is necessary to hand over the device to the service center for its diagnosis and repair.
• Working tool maintenance. The use of the worn working tool reduces the effectiveness of the work and may result in motor or gearbox failure, it is therefore necessary to periodically replace worn out tooling as soon as this becomes necessary.
• Electric motor care. You must be especially careful with the electric motor, avoid getting liquids and foreign objects inside the case. Keep your ventilation holes clean, blow them regularly with compressed air or clean them with a brush. When noticeable sparks appear, contact an authorized service center for diagnostics and possibly replacement of carbon brushes.

To prevent dust and grease leakage this machine has a hermetic design. Therefore, the tool can be used for a long time and you have no need to replace or add grease. After initial commissioning change lubrication every 6 months of operation. To replace the lubricant, contact the service center.
In case of any damage to the power cord turn off the Angle Grinder immediately, carefully, without touching the places of damage, disconnect it from the mains.

ATTENTION!
The tool uses power cord with mounting type Y: for security it must be replaced by authorized repair shop personnel.

Possible faults

The tool does not turn on.

| Broken power cord or mounting wire, malfunction of power cord plug.| ****

Call the service center.

Defective switch.| Call the service center.
Brush wear.| Call the service center.

Circular fire on the collector.

| Fault in the armature winding.| Call the service center.
Wearout /«hang» of brushes.| Call the service center.
Increased noise in the gear.| Wearout / breakage

of the mechanism parts.

| Call the service center.
When working smoke or smell of burning insulation

is generated from the vent.

| Interturn closure of armature or stator windings.| Call the service center.
Malfunction of the electrical part of the instrument.| Call the service center.

Increased machine vibration.

| Wearout / breakage of gears or bearings.| Call the service center.
Faulty or improperly installed tooling.| Replace or reinstall a tooling.

RECYCLING

A tool, developed a designated service life, must be recycled according the rules established by environmental and other laws of the country, where the tool is operated.

TRANSPORTATION

During the transportation direct exposure of precipitation, direct sunlight, heat and shock is not allowed. Transportation should be carried out only in the original packaging at temperature from -20 °С to +40 °С.

STORAGE

During the assigned service life, store the machine in a dry heated room. Recommended storage temperature is from 0 °C to +40 °C. Store the tool in the original packaging.
Before placing the drill in storage remove the working tool.

LIFE TIME

Average product life time is 5 years if the customer follows the rules of operation.

WARRANTY OBLIGATIONS

The product is covered by the manufacturer’s warranty.
The warranty period is specified in the warranty card and calculated from the date of sale. Terms of warranty service are given in the warranty card.
Manufacturer: Zhejiang Jingchuang Tools co., ltd. No.21, North Mingyuan Road, Hardware Technology Industry Zone, Yongkang City, Zhejiang, China.
Made in China.

• The Angle Grinder conforms to the specifications if the following directives and harmonized standards: EC Council Directive 2006/42/EC
• 2014/30/EU
• 2011/65/EU
• EN 60745-1
• EN 60745-2-1
• EN 55014-1
• EN 55014-2
• EN 50581
• EN 61000-3-2
• EN 61000-3-3

References

• ООО "ИнструментПрофСервис"
• Мир Инструмента
• ООО "ИнструментПрофСервис"

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