makita GA7070, GA9070 Angle Grinder Instruction Manual

Angle Grinder
Meuleuse D’Angelo
Esmeriladora Angular
INSTRUCTION MANUAL
GA7070
GA9070

DOUBLE INSULATION

IMPORTANT: Read Before Using.

SPECIFICATIONS

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Specifications may differ from country to country.
• The weight may differ depending on the attachment(s). The lightest and heaviest combination, according to EPTA-Procedure 01/2014, is shown in the table.

For Canada only
* If you install an optional wheel guard indicated as 7″ on the tool, 180 mm (7″) wheels can be used.

SAFETY WARNINGS

General power tool safety warnings
WARNING: Read all safety warnings, instruct- tions, 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

1. Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks that may ignite dust or fumes.
3. Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical Safety

1. 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 the risk of electric shock.
2. 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.
3. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
4. Do not abuse the cord. Never use the cord for carrying, pulling, or unplugging the power tool. Keep the cord away from heat, oil, sharp edges, or moving parts. Damaged or entangled cords increase the risk of electric shock.
5. When operating a power tool outdoors, use an extension cord suitable for outdoor use. The use of a cord suitable for outdoor use reduces the risk of electric shock.
6. If operating a power tool in a damp location is unavoidable, use a Residual Current Device (RCD) protected supply. The use of an RCD reduces the risk of electric shock.
7. Power tools can produce electromagnetic fields (EMF) that are not harmful to the user. However, users of pacemakers and other similar medical devices should contact the maker of their device and/ or doctor for advice before operating this power tool.
8. Do not touch the power plug with wet hands.
9. If the cord is damaged, have it replaced by the manufacturer or his agent in order to avoid a safety hazard

Personal Safety

1. 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.
2. Use personal protective equipment. Always wear eye protection. Protective equipment such as dust masks, non-skid safety shoes, hard hats, or hearing protection used for appropriate conditions will reduce personal injuries
3. Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source and/or BATTERY pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
4. 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.
5. Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
7. If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The use of dust collection can reduce dust-related hazards.
8. Do not let familiarity gained from the 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.
9. Always wear protective goggles to protect your eyes from injury when using power tools. The goggles must comply with ANSI Z87.1 in the USA. It is an employer’s responsibility to enforce the use of appropriate safety protective equipment by the tool operators and by other persons in the immediate working area.

Power tool use and care

1. 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.
2. Do not use the power tool if the switch does not turn on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
3. 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.
4. 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.
5. 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.
6. Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
7. 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.
8. 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.
9. When using the tool, do not wear cloth work gloves which may be entangled. The entanglement of cloth work gloves in the moving parts may result in personal injury.

Service

1. 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.
2. Follow instructions for lubricating and changing accessories.

To reduce the risk of electric shock, this equipment has a polarized plug (one blade is wider than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install the proper outlet. Do not change the plug in any way.
VOLTAGE WARNING: Before connecting the tool to a power source (receptacle, outlet, etc.) be sure the voltage supplied is the same as that specified on the nameplate of the tool. A power source with a voltage greater than that specified for the tool can result in SERIOUS INJURY to the user- as well as damage to the tool. If in doubt, DO NOT PLUG IN THE TOOL. Using a power source with a voltage less than the nameplate rating is harmful to the motor.
USE THE PROPER EXTENSION CORD. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.
Table 1: Minimum gage for cord

Grinder safety warnings

Safety Warnings Common for Grinding, Sanding, Wire Brushing, or Abrasive Cutting-Off Operations:

1. This power tool is intended to function as a grinder, sander, wire brush or cut-off tool. 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.
2. Operations such as polishing are not recommended to be performed with this power tool. Operations for which the power tool was not designed may create a hazard and cause personal injury.
3. Do not use accessories that are not specifically designed and recommended by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation.
4. 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.
5. 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.
6. The threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by flanges, the arbor hole of the accessory must fit the locating diameter of the flange. Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively, and may cause a loss of control.
7. Do not use a damaged accessory. Before each use inspects the accessory such as abrasive wheels for chips and cracks, a backing pad for cracks, tears, or excess wear, and a wire brush for loose or cracked wires. If a 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.
8. Wear personal protective equipment. Depending on the application, use a face shield, safety goggles, or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves, and a workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator must be capable of filtrating particles generated by your operation. Prolonged exposure to high-intensity noise may cause hearing loss.
9. Keep bystanders a safe distance away from the work area. Anyone entering the work area must wear personal protective equipment. Fragments of workpieces or of a broken accessory may fly away and cause injury beyond the immediate area of operation.
10. 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.
11. 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.
12. 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.
13. 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.
14. Regularly clean the power tool’s air vents. The motor’s fan will draw dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.
15. Do not operate the power tool near flammable materials. Sparks could ignite these materials.
16. 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 the 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.

1. Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use an 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.
2. Never place your hand near the rotating accessory. The accessory may kick back over your hand.
3. Do not position your body in the area where the power tool will move if kickback occurs. Kickback will propel the tool in a direction opposite to the wheel’s movement at the point of snagging.
4. 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.
5. Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create frequent kickbacks and loss of control.

Safety Warnings Specific for Grinding and Abrasive Cutting-Off Operations:

1. Use only wheel types that are recommended for your power tool and the specific guard designed for the selected wheel. Wheels for which the power tool was not designed cannot be adequately guarded and are unsafe.
2. The grinding surface of the center-depressed wheels must be mounted below the plane of the guard lip. An improperly mounted wheel that projects through the plane of the guard lip cannot be adequately protected.
3. The guard must be securely attached to the power tool and positioned for maximum safety so that the least amount of wheel is exposed to the operator. The guard helps to protect the operator from broken wheel fragments, accidental contact with the wheel, and sparks that could ignite clothing.
4. Wheels must be used only for recommended applications. For example: do not grind with the side of the cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.
5. Always use undamaged wheel flanges that are of the correct size and shape for your selected wheel. Proper wheel flanges support the wheel thus reducing the possibility of wheel breakage. Flanges for cut-off wheels may be different from grinding wheel flanges.
6. Do not use worn-down wheels from larger power tools. The wheel intended for larger power tools is not suitable for the higher speed of a smaller tool and may burst.

Additional Safety Warnings Specific for Abrasive Cutting-Off Operations:

1. . Do not “jam“ the cut-off wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback or wheel breakage.
2. Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of operation, is moving away from your body, the possible kickback may propel the spinning wheel and the power tool directly at you.
3. When the wheel is binding or when interrupting a cut for any reason, switch off the power tool and hold the power tool motionless until the wheel comes to a complete stop. Never attempt to remove the cut-off wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take corrective action to eliminate the cause of wheel binding.
4. Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully re-enter the cut. The wheel may bind, walk up or kick back if the power tool is restarted in the workpiece. 5. Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.
5. Use extra caution when making a “pocket cut” into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring, or objects that can cause kickback.

Safety Warnings Specific for Sanding Operations:

1. Do not use excessively oversized sanding disc paper. Follow manufacturer recommendations, when selecting sanding paper. Larger sanding paper extending beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc, or kickback. Safety Warnings Specific for Wire Brushing Operations: 1. Be aware that wire bristles are thrown by the brush even during ordinary operation. Do not overstress the wires by applying excessive load to the brush. The wire bristles can easily penetrate light clothing and/or skin.
2. If the use of a guard is recommended for wire brushing, do not allow any interference of the wire wheel or brush with the guard. Wire wheel or brush may expand in diameter due to workload and centrifugal forces.

Additional Safety Warnings:

1. When using depressed center grinding wheels, be sure to use only fiberglass-reinforced wheels.
2. NEVER USE Stone Cup-type wheels with this grinder. This grinder is not designed for these types of wheels and the use of such a product may result in serious personal injury.
3. Be careful not to damage the spindle, the flange (especially the installing surface), or the lock nut. Damage to these parts could result in wheel breakage.
4. Make sure the wheel is not contacting the workpiece before the switch is turned on.
5. Before using the tool on an actual workpiece, let it run for a while. Watch for vibration or wobbling that could indicate poor installation or a poorly balanced wheel.
6. Use the specified surface of the wheel to perform the grinding.
7. Do not leave the tool running. Operate the tool only when hand-held.
8. Do not touch the workpiece immediately after the operation; it may be extremely hot and could burn your skin.
9. Do not touch accessories immediately after the operation; it may be extremely hot and could burn your skin.
10. Observe the instructions of the manufacturer for the correct mounting and use of wheels. Handle and store wheels with care.
11. Do not use separate reducing bushings or adaptors to adapt large-hole abrasive wheels.
12. Use only the flanges specified for this tool.
13. For tools intended to be fitted with a threaded hole wheel, ensure that the thread in the wheel is long enough to accept the spindle length.
14. Check that the workpiece is properly supported.
15. Pay attention that the wheel continues to rotate after the tool is switched off.
16. If the working place is extremely hot and humid, or badly polluted by conductive dust, use a short-circuit breaker (30 mA) to assure operator safety.
17. Do not use the tool on any materials containing asbestos.
18. When using a cut-off wheel, always work with the dust-collecting wheel guard required by domestic regulations.
19. Cutting discs must not be subjected to any lateral pressure.
20.  Do not use cloth work gloves during the operation. Fibers from cloth gloves may enter the tool, which causes tool breakage.
21. Make sure there are no electrical cables, water pipes, gas pipes, etc. that could cause a hazard if damaged by the use of the tool.

SAVE THESE INSTRUCTIONS.
WARNING: DO NOT let comfort or familiarity with the product (gained from repeated use) replace strict adherence to safety rules for the subject product. MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury.

Symbols

The followings show the symbols used for the tool.

| volts
---|---
amperes
hertz
alternating current
rated speed
Class II Construction
revolutions or reciprocation per minute
diameter

FUNCTIONAL DESCRIPTION

CAUTION: Always be sure that the tool is switched off and unplugged before adjusting or checking the function on the tool.
CAUTION: Return the switch trigger to the “OFF” position in case of an accidental unplugging, blackout, or the power is cut unintentionally. Otherwise, the tool may start suddenly when the power returns and it may result in personal injury.
Shaft lock
Press the shaft lock to prevent spindle rotation when installing or removing accessories.

► 1. Shaft lock
NOTICE: Never actuate the shaft lock when the spindle is moving. The tool may be damaged. Switch handle mounting positions
CAUTION: Always make sure that the switch handle is locked in the desired position before operation.
The switch handle can be rotated to either 90° left or right to fit your work needs. First, unplug the tool. Press the lock button and rotate the switch handle to left or right. The switch handle will be locked in that position.

► 1. Motor housing 2. Lock button 3. Handle

Switch action

CAUTION: Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the “OFF” position when released.
There are three patterns of the switch action depending on the country.

► 1. Switch trigger 2. Lock lever
For tools with the lock-on switch Country specific
CAUTION: Switch can be locked in “ON” posi- on for ease of operator comfort during extended use. Apply caution when locking the tool in “ON” position and maintain a  firm grasp on the tool.
To start the tool, simply pull the switch trigger (in the B direction). Release the switch trigger to stop.
For continuous operation, pull the switch trigger (in the B direction) and then push the lock lever (in the A direction).
To stop the tool from the locked position, pull the switch trigger fully (in the B direction), then release it.
For tools with the lock-off switch
Country specific
To prevent the switch trigger from being accidentally pulled, a lock lever is provided.
To start the tool, push the lock lever (in the A direction) and then pull the switch trigger (in the B direction). Release the switch trigger to stop.
NOTICE: Do not pull the switch trigger hard without pressing the lock lever. This can cause switch breakage.
For tools with the lock-on and lock-off switch
Country specific
CAUTION: Switch can be locked in the “ON” position for ease of operator comfort during extended use. Apply caution when locking the tool in the “ON” position and maintain a firm grasp on the tool.
To prevent the switch trigger from being accidentally pulled, a lock lever is provided.
To start the tool, push the lock lever (in the A direction) and then pull the switch trigger (in the B direction). Release the switch trigger to stop.
For continuous operation, push in the lock lever (in the A direction), pull the switch trigger (in the B direction), and then pull the lock lever (in the C direction).
To stop the tool from the locked position, pull the switch trigger fully (in the B direction), then release it.
NOTICE: Do not pull the switch trigger hard without pressing in the lock lever. This can cause switch breakage.
Indication lamp

► 1. Indication lamp
The indication lamp lights up green when the tool is plugged. If the indicator lamp does not light up, the mains cord or the controller may be defective.
The indication lamp lights up but the tool does not start even if the tool is switched on, the controller or the switch may be defective. If the indicator lamp blinks in red, the carbon brushes may be worn out or the motor may be defective.
Unintentional restart proof
The tool does not start with the switch being lock-on even when the tool is plugged in.
At this time, the indication lamp blinks in red to show the unintentional restart-proof device is working.
To cancel the unintentional restart proof, return the switch to the OFF position.
NOTE: Wait more than one second before restarting the tool when unintentional restart proof works.
Active Feedback sensing Technology
CAUTION: Hold the tool firmly until the rotation stops.
The tool electronically detects situations where the wheel or accessory may be at risk to be bound. In such a situation, the tool automatically shuts off the power to prevent further rotation of the spindle (this does not prevent kickback). At this time, the indication lamp blinks in red and shows the Active Feedback sensing Technology is working. To restart the tool, switch off the tool first, remove the cause of the sudden drop in the rotation speed, and then turn the tool on.
Soft start feature
The soft start feature reduces starting of the reaction.

ASSEMBLY

CAUTION: Always be sure that the tool is switched off and unplugged before carrying out any work on the tool.
Installing side grip (handle)
CAUTION: Always be sure that the side grip is installed securely before operation.
CAUTION: You can install the side grip on the 3 holes. Install the side grip on one of the holes according to the operation.
Screw the side grip securely on the position of the tool as shown in the figure.

Installing or removing the loop handle
Optional accessory
CAUTION: Always be sure the bolts on the loop handle is securely tightened before use.
**CAUTION:** Hold the gripping area of the loop handle specified in the figure. Also, keep the hand away from the metal part of the grinder during operation. Touching the metal part may result in electric shock if the cutting attachment cuts live wire unexpectedly.
The loop handle can be more comfortable than the original side grip for some applications.
To install the loop handle, mount it onto the tool as illustrated and tighten two bolts to fix it. To remove the loop handle, follow the installation procedure in reverse.

► 1. Loop handle 2. Bolt 3. Gripping area
Installing or removing wheel guard (For depressed center wheel, flap disc, flex wheel, wire wheel brush / abrasive cut-off wheel, diamond wheel)
WARNING: When using a depressed center wheel, flap disc, flex wheel, or wire wheel brush, the wheel guard must be fitted on the tool so that the closed side of the guard always points toward the operator.
WARNING: When using an abrasive cut-off/diamond wheel, be sure to use only the special wheel guard designed for use with cut-off wheels.
For tools with locking screw type wheel guard
Mount the wheel guard with the protrusions on the wheel guard band aligned with the notches on the bearing box. Then rotate the wheel guard to such an angle that it can protect the operator according to work. Be sure to tighten the screw securely.
To remove the wheel guard, follow the installation procedure in reverse.

► 1. Wheel guard 2. Bearing box 3. Screw
For tools with clamp lever type wheel guard
Optional accessory
WARNING: The wheel guard must be fitted on the tool so that the closed side of the guard always points toward the operator.
Loosen the nut, and then pull the lever in the direction of the arrow.

► 1. Nut 2. Lever
Mount the wheel guard with the protrusions on the wheel guard band aligned with the notches on the bearing box. Then rotate the wheel guard to such an angle that it can protect the operator according to work.

► 1. Wheel guard 2. Bearing box

► 1. Wheel guard
Securely tighten the nut using a spanner, and then close the lever in direction of the arrow to fasten the wheel guard. If the lever is too tight or too loose to fasten the wheel guard, open the lever and then loosen or tighten the nut using the spanner to adjust the tightening of the wheel guard band.

► 1. Nut 2. Lever
To remove the wheel guard, follow the installation procedure in reverse.
Installing or removing the depressed center wheel or flap disc
Optional accessory
WARNING: When using a depressed center wheel or flap disc, the wheel guard must be fitted on the tool so that the closed side of the guard always points toward the operator.
CAUTION: Make sure that the mounting part of the inner flange fits into the inner diameter of the depressed center wheel/flap disc perfectly.
Mounting the inner flange on the wrong side may result in a dangerous vibration.
Mount the inner flange onto the spindle. Make sure to fit the dented part of the inner flange onto the straight part at the bottom of the spindle. Fit the wheel/disc on the inner flange and screw the lock nut with its protrusion facing downward (facing towards the wheel).

► 1. Lock nut 2. Depressed center wheel 3. Inner flange
To tighten the lock nut, press the shaft lock firmly so that the spindle cannot revolve, then use the lock nut wrench and securely tighten clockwise.

► 1. Lock nut wrench 2. Shaft lock
To remove the wheel, follow the installation procedure in reverse.
NOTE: In countries other than the United States and Canada, Inner flange 45 can be also used.

Installing or removing the flex wheel

Optional accessory
WARNING: Always use supplied guard when the flex wheel is on the tool. The wheel can shatter during use and the guard helps to reduce the chances of personal injury.

► 1. Lock nut 2. Flex wheel 3. Back up pad 4. Inner flange
Follow instructions for the depressed center wheel but also use a backup pad over the wheel. See the order of assembly on the accessories page in this manual.
Installing or removing abrasive disc
Optional accessory

► 1. Sanding lock nut 2. Abrasive disc 3. Rubber pad

1. Mount the rubber pad onto the spindle.
2. Fit the disc on the rubber pad and screw the sanding lock nut onto the spindle.
3. Hold the spindle with the shaft lock, and securely tighten the sanding lock nut clockwise with the lock nut wrench.

To remove the disc, follow the installation procedure in reverse.
NOTE: Use sander accessories specified in this manual. These must be purchased separately.
Installing or removing abrasive cutoff/diamond wheel
Optional accessory
WARNING: When using an abrasive cut-off/diamond wheel, be sure to use only the special wheel guard designed for use with cut-off wheels.
WARNING: NEVER use the cut-off wheel for side grinding.
Mount the inner flange onto the spindle.
Fit the wheel/disc on the inner flange and screw the lock nut onto the spindle.

► 1. Lock nut 2. Abrasive cut-off wheel/diamond wheel 3. Inner flange 4. Wheel guard for abrasive cut-off wheel /diamond wheel
For the United States and Canada

► 1. Lock nut 2. Outer flange 78 3. Abrasive cut-off wheel/diamond wheel 4. Inner flange 78 5. Wheel guard for abrasive cut-off wheel/diamond wheel
Installing wire cup brush
Optional accessory
CAUTION: Do not use a brush that is damaged, or which is out of balance. The use of a damaged brush could increase the potential for injury from contact with broken brush wires.
► 1. Wire cup brush 2. Urethane washer (included depending on the country)
Unplug the tool and place it upside down allowing easy access to the spindle.
Remove any accessories on the spindle. Thread wire cup brush onto the spindle and tighten with the wrench.
Installing wire wheel brush
Optional accessory
CAUTION: Do not use a wire wheel brush that is damaged, or is out of balance. The use of a damaged wire wheel brush could increase the potential for injury from contact with broken wires.
CAUTION: ALWAYS use a guard with wire wheel brushes, assuring the diameter of the wheel fits inside the guard. The wheel can shatter during use and the guard helps to reduce the chances of personal injury.

► 1. Wire wheel brush
Remove any accessories on the spindle. Thread the wire wheel brushes onto the spindle and tighten with the wrench.
Installing dust-collecting wheel guard
Dust collecting wheel guard for grinding

► 1. Lock nut 2. Cup-type diamond wheel 3. Hubbed cup-type diamond wheel 4. Inner flange 5. Dust collecting wheel guard 6. Bearing box
WARNING: Dust collecting wheel guard for grinding is only for use in grinding flat concrete with a cup-type diamond wheel. Do not use it with grinding stones or for any purpose other than mentioned.
Dust collecting wheel guard for cut-off (for model GA9070)

NOTE: For information on how to install the dust-collecting cover, refer to the manual of the dust-collecting cover.
Connecting a vacuum cleaner
Optional accessory
WARNING: Never vacuum metal particles generated by the operation. Metal particles generated by such operation are so hot that they ignite dust and the filter inside the vacuum cleaner.
To avoid a dusty environment caused by masonry cutting, use a dust-collecting wheel guard and a vacuum cleaner.
Refer to the instruction manual attached to the dust-collecting wheel guard for assembling and using it.

► 1. Dust collecting wheel guard for cut-off 2. Hose of the vacuum cleaner

OPERATION

WARNING: It should never be necessary to force the tool. The weight of the tool applies adequate pressure. Forcing and excessive pressure could cause dangerous wheel breakage.
WARNING: ALWAYS replace the wheel if the tool is dropped while grinding.
WARNING: NEVER bang or hit the grinding disc or wheel onto work.
WARNING: Avoid bouncing and snagging the wheel, especially when working corners, sharp edges, etc. This can cause loss of control and kickback.
WARNING: NEVER use tools with wood cutting blades and other saw blades. Such blades when used on a grinder frequently kick and cause loss of control leading to personal injury.
CAUTION: Never switch on the tool when it is in contact with the workpiece, it may cause an injury to the operator.
CAUTION: Always wear safety goggles or a face shield during operation.
CAUTION: After the operation, always switch off the tool and wait until the wheel has come to a complete stop before putting the tool down.
CAUTION: ALWAYS hold the tool firmly with one hand on the housing and the other on the side grip (handle).
Grinding and sanding operation

Turn the tool on and then apply the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an angle of about 15° to the workpiece surface.
During the break-in period with a new wheel, do not work the grinder in the forwarding direction or it may cut into the workpiece. Once the edge of the wheel has been rounded off by use, the wheel may be worked in both forward and backward directions.
Operation with abrasive cut-off /diamond wheel
Optional accessory
WARNING: Do not “jam” the wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback, wheel breakage, and overheating of the motor may occur.
WARNING: Do not start the cutting operation of the workpiece. Let the wheel reach full speed and carefully enter into the cut moving the tool forward over the workpiece surface. The wheel may bind, walk up or kick back if the power tool is started in the workpiece.
WARNING: During cutting operations, never change the angle of the wheel. Placing side pressure on the cut-off wheel (as in grinding) will cause the wheel to crack and break, causing serious personal injury.
WARNING: A diamond wheel shall be operated perpendicular to the material being cut.
Usage example: operation with an abrasive cut-off wheel

Usage example: operation with a diamond wheel

Operation with a wire cup brush
Optional accessory
CAUTION: Check the operation of the brush by the running tool with no load, ensuring that no one is in front of or in line with a brush.
NOTICE: Avoid applying too much pressure which causes overbending of wires when using the wire cup brush. It may lead to premature breakage. Usage example: operation with a wire cup brush

Operation with a wire wheel brush
Optional accessory
CAUTION: Check the operation of the wire wheel brush by running the tool with no load, insuring that no one is in front of or in line with the wire wheel brush.
NOTICE: Avoid applying too much pressure which causes overbending of wires when using a wire wheel brush. It may lead to premature breakage.
Usage example: operation with a wire wheel brush

MAINTENANCE

CAUTION: Always be sure that the tool is switched off and unplugged before attempting to perform an inspection or maintenance.
NOTICE: Never use gasoline, benzene, thinner, alcohol, or the like. Discoloration, deformation, or cracks may result.
To maintain product SAFETY and RELIABILITY, repairs, and any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.
NOTE: Do not loosen the screw on the cover. Otherwise, the cover may be opened accidentally.

► 1. Screw
Air vent cleaning
The tool and its air vents have to be kept clean. Regularly clean the tool’s air vents or whenever the vents start to become obstructed.

► 1. Exhaust vent 2. Inhalation vent
Brake maintenance
The tool should be immediately repaired by Makita Authorized or Factory Service Centers in the following situation or any other malfunction;

• The braking performance declines noticeably.
• The inertial rotation of the accessory continues for more than 6 seconds after releasing the switch trigger.

OPTIONAL ACCESSORIES

CAUTION: These accessories or attachments are recommended for use with your Makita tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons.
Only use accessory or attachment for its stated purpose.
If you need any assistance with more details regarding these accessories, ask your local Makita Service Center.

Side grip / Loop handle
Wheel guard for depressed center grinding wheel/flap disc/wire wheel brush
Inner flange 45 / Inner flange 89 1
Depressed center grinding wheel / Flap disc
Lock nut 5/8 – 45
Wheel guard for abrasive cut off wheel/diamond wheel
Inner flange 78 (the United States and Canada only)2
Abrasive cut-off wheel / Diamond wheel
Outer flange 78 (the United States and Canada only) *2
Back up pad
Flex wheel
Rubber pad
Abrasive disc
Sanding lock nut
Wire wheel brush
Urethane washer 14 (included depending on the country)
Wire cup brush
–| Side grip for a dust-collecting wheel guard
–| Dust collecting wheel guard for cut-off
–| Special flange
–| Diamond wheel
Dust collecting wheel guard for offset diamond wheel
–| 180 mm 1| 230 mm
---|---|---
23| Offset diamond wheel
–| Lock nut wrench
–| Dust cover attachment

NOTE: 1 In countries other than the United States and Canada, Inner flange 45 can be also used.
NOTE: 2 Use inner flange 78 and outer flange 78 together (the United States and Canada only).
NOTE: Some items in the list may be included in the tool package as standard accessories. They may differ from country to country.

MAKITA LIMITED WARRANTY

Please refer to the annexed warranty sheet for the most current warranty terms applicable to this product.
If the annexed warranty sheet is not available, refer to the warranty details set forth on the below website for your respective country.
United States of America: www.makitatools.com
Canada: www.makita.ca
Other countries: www.makita.com
WARNING
Some dust is created by power sanding, sawing, grinding, drilling, and other construction activities containing chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Some examples of these chemicals are:

• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well-ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
www.makita.com
885878-947
GA7070-1
EN, FRCA, ESMX
20210426

Documents / Resources

| makita GA7070, GA9070 Angle Grinder [pdf] Instruction Manual
GA7070 GA9070 Angle Grinder, GA7070 Angle Grinder, GA9070 Angle Grinder, Angle Grinder, Grinder, GA7070, GA9070
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References

• Makita Canada | The Leader In Power tool Technology
• MAKITA Industrial Power Tools - The Leader In Cordless with 18V LXT Lithium-Ion
• Makita U.S.A | Cordless and Corded Power Tools, Power Equipment, Pneumatics, Accessories

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