DGA508Y1J - Grinder MAKITA - Free user manual and instructions

USER MANUAL DGA508Y1J MAKITA

Fig.26 56 ENGLISH ENGLISH (Original instructions) SPECIFICATIONS Model: DGA408 DGA458 DGA508 Wheel diameter 100mm (4″) 115mm (4-1/2″) 125mm (5″) Max. wheel thickness 6.4mm Spindle thread M10 M14 or 5/8″ (country specic) Rated speed (n) 8,500min

Overall length With battery cartridge BL1815N, BL1820, BL1820B 348mm With battery cartridge BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860B 362mm Net weight With battery cartridge BL1815N, BL1820, BL1820B 2.2kg 2.4kg With battery cartridge BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860B 2.5kg 2.6kg Rated voltage D.C. 18 V

• Due to our continuing program of research and development, the specications herein are subject to change without notice.

• Specications and battery cartridge may differ from country to country.

• Weight, with battery cartridge, according to EPTA-Procedure 01/2003 Intended use The tool is intended for grinding, sanding and cutting of metal and stone materials without the use of water. Noise The typical A-weighted noise level determined accord- ing to EN60745: Model DGA408 Sound pressure level (L

WARNING: Wear ear protection.

Vibration The vibration total value (tri-axial vector sum) deter- mined according to EN60745: Model DGA408 Work mode: surface grinding with normal side grip Vibration emission (a h, AG ) : 4.5 m/s

Work mode: surface grinding with anti vibration side grip Vibration emission (a h, AG ) : 4.5 m/s

Work mode: disc sanding with normal side grip Vibration emission (a h, DS ) : 2.5 m/s

Work mode: disc sanding with anti vibration side grip Vibration emission (a h, DS ) : 2.5 m/s

Model DGA458 Work mode: surface grinding with normal side grip Vibration emission (a h, AG ) : 5.5 m/s

Work mode: surface grinding with anti vibration side grip Vibration emission (a h, AG ) : 5.0 m/s

Work mode: disc sanding with normal side grip Vibration emission (a h, DS ) : 2.5 m/s

Work mode: disc sanding with anti vibration side grip Vibration emission (a h, DS ) : 2.5 m/s

Model DGA508 Work mode: surface grinding with normal side grip Vibration emission (a h, AG ) : 6.0 m/s

Work mode: surface grinding with anti vibration side grip Vibration emission (a h, AG ) : 5.5 m/s

Work mode: disc sanding with normal side grip Vibration emission (a h, DS ) : 2.5 m/s

Work mode: disc sanding with anti vibration side grip Vibration emission (a h, DS ) : 2.5 m/s

NOTE: The declared vibration total value(s) has been measured in accordance with a standard test method and may be used for comparing one tool with another. NOTE: The declared vibration total value(s) may also be used in a preliminary assessment of exposure.7 ENGLISH

WARNING: The vibration emission during

actual use of the power tool can differ from the declared value(s) depending on the ways in which the tool is used especially what kind of workpiece is processed.

WARNING: Be sure to identify safety mea-

sures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time).

WARNING: The declared vibration emission

value is used for main applications of the power tool. However if the power tool is used for other applica- tions, the vibration emission value may be different. EC Declaration of Conformity For European countries only The EC declaration of conformity is included as Annex A to this instruction manual. General power tool safety warnings

WARNING: Read all safety warnings and

all instructions. Failure to follow the warnings and instructions may result in electric shock, re and/or serious injury. Save all warnings and instruc- tions for future reference. The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool. Cordless grinder safety warnings Safety Warnings Common for Grinding, Sanding, Wire Brushing, or Abrasive Cutting-Off Operations:

This power tool is intended to function as a grinder, sander, wire brush or cut-off tool. Read all safety warnings, instructions, illustrations and specications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, re and/or serious injury.

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 which are not speci-

cally 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 y 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.

Threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by anges, the arbour hole of the accessory must t the locating diameter of the ange. 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 undam- aged 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 ying debris generated by various opera- tions. The dust mask or respirator must be capable of ltrating particles generated by your operation. 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 per- sonal protective equipment. Fragments of workpiece or of a broken accessory may y away and cause injury beyond immediate area of operation.

10. Hold the power tool by insulated gripping

surfaces only, when performing an operation where the cutting tool may contact hidden wiring. Contact with a "live" wire will also make exposed metal parts of the power tool "live" and could give the operator an electric shock.

11. Never lay the power tool down until the acces-

sory has come to a complete stop. The spinning accessory may grab the surface and pull the power tool out of your control.

12. 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.

13. 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.

14. Do not operate the power tool near ammable

materials. Sparks could ignite these materials.

15. 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 acces- sory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncon- trolled power tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding.8 ENGLISH 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 move- ment 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 rm grip on the power tool and

position your body and arm 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 kick- back forces, if proper precautions are taken.

2. Never place your hand near the rotating acces-

sory. Accessory may kickback over your hand.

3. 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.

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 fre- quent kickback and loss of control. Safety Warnings Specic for Grinding and Abrasive Cutting-Off Operations:

1. Use only wheel types that are recommended

for your power tool and the specic 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 centre 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.

The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed towards the operator. The guard helps to protect the opera- tor from broken wheel fragments, accidental contact with wheel and sparks that could ignite clothing.

Wheels must be used only for recommended applications. For example: do not grind with the side of 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 anges that are

of correct size and shape for your selected wheel. Proper wheel anges support the wheel thus reducing the possibility of wheel breakage. Flanges for cut-off wheels may be different from grinding wheel anges.

6. Do not use worn down wheels from larger

power tools. Wheel intended for larger power tool is not suitable for the higher speed of a smaller tool and may burst. Additional Safety Warnings Specic for Abrasive Cutting-Off Operations:

1. Do not “jam“ the cut-off wheel or apply exces-

sive 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 possibil- ity 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 spin- ning wheel and the power tool directly at you.

3. When 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 correc- tive action to eliminate the cause of wheel binding.

Do not restart the cutting operation in the work- piece. Let the wheel reach full speed and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool is restarted in the workpiece.

5. Support panels or any oversized workpiece to

minimize the risk of wheel pinching and kick- back. 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.

6. Use extra caution when making a “pocket cut”

into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, elec- trical wiring or objects that can cause kickback. Safety Warnings Specic for Sanding Operations:

1. Do not use excessively oversized sanding

disc paper. Follow manufacturers recommen- dations, 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 Specic 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 work load and centrifugal forces. Additional Safety Warnings:

When using depressed centre grinding wheels, be sure to use only berglass-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

ange (especially the installing surface) or the lock nut. Damage to these parts could result in wheel breakage.9 ENGLISH

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 specied surface of the wheel to per-

7. Do not leave the tool running. Operate the tool

only when hand-held.

8. Do not touch the workpiece immediately after

operation; it may be extremely hot and could burn your skin.

9. Observe the instructions of the manufacturer

for correct mounting and use of wheels. Handle and store wheels with care.

10. Do not use separate reducing bushings or

adaptors to adapt large hole abrasive wheels.

11. Use only anges specied for this tool.

12. For tools intended to be tted with threaded

hole wheel, ensure that the thread in the wheel is long enough to accept the spindle length.

13. Check that the workpiece is properly

14. Pay attention that the wheel continues to

rotate after the tool is switched off.

If working place is extremely hot and humid, or badly polluted by conductive dust, use a short-cir- cuit breaker (30 mA) to assure operator safety.

17. When use cut-off wheel, always work with

the dust collecting wheel guard required by domestic regulation.

18. Cutting discs must not be subjected to any

19. Do not use cloth work gloves during operation.

Fibers from cloth gloves may enter the tool, which causes tool breakage. SAVE THESE INSTRUCTIONS.

WARNING: DO NOT let comfort or familiarity

with 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. Important safety instructions for battery cartridge

Before using battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.

2. Do not disassemble battery cartridge.

3. If operating time has become excessively

shorter, stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.

4. If electrolyte gets into your eyes, rinse them

out with clear water and seek medical atten- tion right away. It may result in loss of your eyesight.

5. Do not short the battery cartridge:

(1) Do not touch the terminals with any con- ductive material. (2) Avoid storing battery cartridge in a con- tainer with other metal objects such as nails, coins, etc. (3) Do not expose battery cartridge to water or rain. A battery short can cause a large current ow, overheating, possible burns and even a breakdown.

6. Do not store the tool and battery cartridge in

locations where the temperature may reach or exceed 50 °C (122 °F).

7. Do not incinerate the battery cartridge even if

it is severely damaged or is completely worn out. The battery cartridge can explode in a re.

8. Be careful not to drop or strike battery.

9. Do not use a damaged battery.

10. The contained lithium-ion batteries are subject

to the Dangerous Goods Legislation require- ments. For commercial transports e.g. by third parties, forwarding agents, special requirement on pack- aging and labeling must be observed. For preparation of the item being shipped, consult- ing an expert for hazardous material is required. Please also observe possibly more detailed national regulations. Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the packaging.

11. Follow your local regulations relating to dis-

12. Use the batteries only with the products

specied by Makita. Installing the batteries to non-compliant products may result in a re, exces- sive heat, explosion, or leak of electrolyte. SAVE THESE INSTRUCTIONS. CAUTION: Only use genuine Makita batteries. Use of non-genuine Makita batteries, or batteries that have been altered, may result in the battery bursting causing res, personal injury and damage. It will also void the Makita warranty for the Makita tool and charger. Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely

discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.

2. Never recharge a fully charged battery car-

tridge. Overcharging shortens the battery service life.

3. Charge the battery cartridge with room tem-

perature at 10 °C - 40 °C (50 °F - 104 °F). Let a hot battery cartridge cool down before charging it.

4. Charge the battery cartridge if you do not use

it for a long period (more than six months).10 ENGLISH FUNCTIONAL DESCRIPTION CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking function on the tool. Installing or removing battery cartridge CAUTION: Always switch off the tool before installing or removing of the battery cartridge. CAUTION: Hold the tool and the battery cartridge rmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge rmly may cause them to slip off your hands and result in damage to the tool and battery cartridge and a personal injury. ► Fig.1: 1. Red indicator 2. Button 3. Battery cartridge To remove the battery cartridge, slide it from the tool while sliding the button on the front of the cartridge. To install the battery cartridge, align the tongue on the battery cartridge with the groove in the housing and slip it into place. Insert it all the way until it locks in place with a little click. If you can see the red indicator on the upper side of the button, it is not locked completely. CAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you. CAUTION: Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly. Indicating the remaining battery capacity Only for battery cartridges with the indicator ► Fig.2: 1. Indicator lamps 2. Check button Press the check button on the battery cartridge to indi- cate the remaining battery capacity. The indicator lamps light up for a few seconds. Indicator lamps Remaining capacity Lighted Off Blinking 75% to 100% 50% to 75% 25% to 50% 0% to 25% Charge the battery. The battery may have malfunctioned. NOTE: Depending on the conditions of use and the ambient temperature, the indication may differ slightly from the actual capacity. Indicating the remaining battery capacity Country specic When you turn the tool on, the battery indicator shows the remaining battery capacity. ► Fig.3: 1. Battery indicator The remaining battery capacity is shown as the follow- ing table. Battery indicator status Remaining battery capacity

Off Blinking 50% to 100% 20% to 50% 0% to 20% Charge the battery Tool / battery protection system The tool is equipped with a tool/battery protection sys- tem. This system automatically cuts off power to the motor to extend tool and battery life. The tool will auto- matically stop during operation if the tool or battery is placed under one of the following conditions: Overload protection When the tool is operated in a manner that causes it to draw an abnormally high current, the tool automatically stops without any indication. In this situation, turn the tool off and stop the application that caused the tool to become overloaded. Then turn the tool on to restart. Overheat protection When the tool is overheated, the tool stops automati- cally and the battery indicator shows following state. In this situation, let the tool cool before turning the tool on again.

Blinking If the tool does not start, the battery may be overheated. In this situation, let the battery cool before starting the tool again.11 ENGLISH Overdischarge protection When the battery capacity is not enough, the tool stops automatically. In this case, remove the battery from the tool and charge the battery. Releasing protection lock When the protection system works repeatedly, the tool is locked and the battery indicator shows the following state. In this situation, the tool does not start even if turning the tool off and on. To release the protection lock, remove the battery, set it to the battery charger and wait until the charging nishes.

Off Blinking Shaft lock Press the shaft lock to prevent spindle rotation when installing or removing accessories. ► Fig.4: 1. Shaft lock NOTICE: Never actuate the shaft lock when the spindle is moving. The tool may be damaged. Switch action CAUTION: Before installing the battery car- tridge into the tool, always check to see that the switch lever actuates properly and returns to the "OFF" position when released. CAUTION: Do not pull the switch lever hard without pulling the lock-off lever. This can cause switch breakage. CAUTION: For your safety, this tool is equipped with lock-off lever which prevents the tool from unintended starting. NEVER use the tool if it runs when you simply pull the switch trigger without pulling the lock-off lever. Return the tool to our authorized service center for proper repairs BEFORE further usage. CAUTION: NEVER tape down or defeat pur- pose and function of lock-off lever. To prevent the switch lever from being accidentally pulled, a lock-off lever is provided. To start the tool, pull the lock-off lever toward the opera- tor and then pull the switch lever. To stop the tool, release the switch lever. ► Fig.5: 1. Lock-off lever 2. Switch lever Automatic speed change function ► Fig.6: 1. Mode indicator Mode indicator status Operation mode High speed mode High torque mode This tool has "high speed mode" and "high torque mode". It automatically changes operation mode depending on the work load. When mode indicator lights up during operation, the tool is in high torque mode. Accidental re-start preventive function Even if installing the battery cartridge while pulling the switch lever, the tool does not start. To start the tool, rst release the switch lever. Then pull the lock-off lever, and pull the switch lever. Electronic torque control function The tool electronically detects situations where the wheel or accessory may be at risk to be bound. In the situation, the tool is automatically shut off to prevent further rotation of the spindle (it does not prevent kickback). To restart the tool, switch off the tool rst, remove the cause of sudden drop in the rotation speed, and then turn the tool on. Soft start feature Soft start feature reduces starting reaction. Electric brake Electric brake is activated after the tool is switched off. The brake does not work when the power supply is shut down, such as the battery is removed accidentally, with the switch still on. ASSEMBLY CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking function on the tool. Installing side grip (handle) CAUTION: Always be sure that the side grip is installed securely before operation. Screw the side grip securely on the position of the tool as shown in the gure. ► Fig.712 ENGLISH Installing or removing wheel guard (For depressed center wheel, ap disc, ex wheel, wire wheel brush / abrasive cut-off wheel, diamond wheel)

WARNING: When using a depressed center

wheel, ap disc, ex wheel or wire wheel brush, the wheel guard must be tted 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. (In some European countries, when using a diamond wheel, the ordinary guard can be used. Follow the regulations in your country.) For tool with locking screw type wheel guard Mount the wheel guard with the protrusions on the wheel guard band aligned with the notches on the bear- ing 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 wheel guard, follow the installation proce- dure in reverse. ► Fig.8: 1. Wheel guard 2. Bearing box 3. Screw For tool with clamp lever type wheel guard Loosen the screw, and then pull the lever in the direc- tion of the arrow. Mount the wheel guard with the protru- sions 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. ► Fig.9: 1. Wheel guard 2. Bearing box 3. Screw

Pull the lever in direction of the arrow. Then tighten the wheel guard with fastening the screw. Be sure to tighten the screw securely. The setting angle of the wheel guard can be adjusted with the lever. ► Fig.10: 1. Screw 2. Lever To remove wheel guard, follow the installation proce- dure in reverse. Installing or removing depressed center wheel or ap disc Optional accessory

WARNING: When using a depressed center

wheel or ap disc, the wheel guard must be tted 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 ange ts into the inner diameter of the depressed center wheel / ap disc perfectly. Mounting the inner ange on the wrong side may result in the dangerous vibration. Mount the inner ange onto the spindle. Make sure to t the dented part of the inner ange onto the straight part at the bottom of the spindle. Fit the depressed center wheel / ap disc on the inner ange and screw the lock nut onto the spindle. ► Fig.11: 1. Lock nut 2. Depressed center wheel

3. Inner ange 4. Mounting part

To tighten the lock nut, press the shaft lock rmly so that the spindle cannot revolve, then use the lock nut wrench and securely tighten clockwise. ► Fig.12: 1. Lock nut wrench 2. Shaft lock To remove the wheel, follow the installation procedure in reverse. Installing or removing ex wheel Optional accessory

WARNING: Always use supplied guard when

ex wheel is on tool. Wheel can shatter during use and guard helps to reduce chances of personal injury. ► Fig.13: 1. Lock nut 2. Flex wheel 3. Back up pad

Follow instructions for depressed center wheel but also use back up pad over wheel. See order of assembly on accessories page in this manual. Installing or removing abrasive disc Optional accessory NOTE: Use sander accessories specied in this man- ual. These must be purchased separately. For 100 mm (4″) model ► Fig.14: 1. Sanding lock nut 2. Abrasive disc

3. Rubber pad 4. Inner ange

1. Mount the inner ange onto the spindle.

2. Mount the rubber pad onto the spindle.

3. Fit the disc on the rubber pad and screw the sand-

ing lock nut onto the spindle.

4. 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.13 ENGLISH For 115 mm (4 - 1/2″) / 125 mm (5″) model ► Fig.15: 1. Sanding lock nut 2. Abrasive disc

1. Mount the rubber pad onto the spindle.

2. Fit the disc on the rubber pad and screw the sand-

ing 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. OPERATION

WARNING: It should never be necessary to

force the tool. The weight of the tool applies ade- quate pressure. Forcing and excessive pressure could cause dangerous wheel breakage.

WARNING: ALWAYS replace wheel if tool is

dropped while grinding.

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 tool 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 operator. CAUTION: Always wear safety goggles or a face shield during operation. CAUTION: After 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 rmly with one hand on housing and the other on the side grip (handle). Grinding and sanding operation ► Fig.16 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 forward 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 direction. Operation with abrasive cut-off / 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. (In some European countries, when using a diamond wheel, the ordinary guard can be used. Follow the regulations in your country.)

WARNING: NEVER use cut-off wheel for side

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

in 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 kickback if the power tool is started in the workpiece.

WARNING: During cutting operations, never

change the angle of the wheel. Placing side pres- sure on the cut-off wheel (as in grinding) will cause the wheel to crack and break, causing serious per- sonal injury.

WARNING: A diamond wheel shall be oper-

ated perpendicular to the material being cut. ► Fig.17: 1. Lock nut 2. Abrasive cut-off wheel / dia- mond wheel 3. Inner ange 4. Wheel guard for abrasive cut-off wheel / diamond wheel As for the installation, follow the instructions for depressed center wheel. The direction for mounting the lock nut and the inner ange varies by wheel type and thickness. Refer to the following gures. For 100 mm (4″) model When installing the abrasive cut-off wheel: ► Fig.18: 1. Lock nut 2. Abrasive cut-off wheel (Thinner than 4 mm (5/32")) 3. Abrasive cut- off wheel (4 mm (5/32") or thicker) 4. Inner ange When installing the diamond wheel: ► Fig.19: 1. Lock nut 2. Diamond wheel (Thinner than 4 mm (5/32″)) 3. Diamond wheel (4 mm (5/32″) or thicker) 4. Inner ange14 ENGLISH For 115 mm (4 - 1/2″) / 125 mm (5″) model When installing the abrasive cut-off wheel: ► Fig.20: 1. Lock nut 2. Abrasive cut-off wheel (Thinner than 4 mm (5/32")) 3. Abrasive cut- off wheel (4 mm (5/32") or thicker) 4. Inner ange When installing the diamond wheel: ► Fig.21: 1. Lock nut 2. Diamond wheel (Thinner than 4 mm (5/32″)) 3. Diamond wheel (4 mm (5/32″) or thicker) 4. Inner ange Operation with wire cup brush Optional accessory CAUTION: Check operation of brush by run- ning tool with no load, insuring that no one is in front of or in line with brush. CAUTION: Do not use brush that is damaged, or which is out of balance. Use of damaged brush could increase potential for injury from contact with broken brush wires. ► Fig.22: 1. Wire cup brush Remove the battery cartridge from the tool and place it upside down allowing easy access to spindle. Remove any accessories on spindle. Thread wire cup brush onto spindle and tighten with supplied wrench. NOTICE: Avoid applying too much pressure which causes over bending of wires when using brush. It may lead to premature breakage. Operation with wire wheel brush Optional accessory CAUTION: Check operation of wire wheel brush by running tool with no load, insuring that no one is in front of or in line with the wire wheel brush. CAUTION: Do not use wire wheel brush that is damaged, or which is out of balance. Use of damaged wire wheel brush could increase potential for injury from contact with broken wires. CAUTION: ALWAYS use guard with wire wheel brushes, assuring diameter of wheel ts inside guard. Wheel can shatter during use and guard helps to reduce chances of personal injury. ► Fig.23: 1. Wire wheel brush Remove the battery cartridge from the tool and place it upside down allowing easy access to spindle. Remove any accessories on spindle. Thread wire wheel brush onto spindle and tighten with the wrenches. NOTICE: Avoid applying too much pressure which causes over bending of wires when using wire wheel brush. It may lead to premature breakage. MAINTENANCE CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before attempting to perform inspection or maintenance. NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result. 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. ► Fig.24: 1. Exhaust vent 2. Inhalation vent Remove the dust cover from inhalation vent and clean it for smooth air circulation. ► Fig.25: 1. Dust cover NOTICE: Clean out the dust cover when it is clogged with dust or foreign matters. Continuing operation with a clogged dust cover may damage the tool.15 ENGLISH OPTIONAL ACCESSORIES CAUTION: These accessories or attachments are recommended for use with your Makita tool spec- ied 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 for more details regarding these accessories, ask your local Makita Service Center.

• Makita genuine battery and charger ► Fig.26 - 100 mm (4″) model 115 mm (4-1/2″) model 125 mm (5″) model 1 Grip 36 2 Wheel Guard (for grinding wheel) 3 Inner ange 4 Depressed center wheel / Flap disc 5 Lock nut 6 Back up pad 7 Flex wheel 8 Inner ange and rubber pad 76 Rubber pad 100 Rubber pad 115 9 Abrasive disc 10 Sanding lock nut 11 Wire wheel brush 12 Wire cup brush 13 Wheel Guard (for cut-off wheel) *1 14 Abrasive cut-off wheel / Diamond wheel - Lock nut wrench NOTE: *1 In some European countries, when using a diamond wheel, the ordinary guard can be used instead of the special guard covering the both side of the wheel. Follow the regulations in your country. NOTE: Some items in the list may be included in the tool package as standard accessories. They may differ from country to country.16 FRANÇAIS FRANÇAIS (Instructions originales) SPÉCIFICATIONS Modèle : DGA408 DGA458 DGA508 Diamètre de meule 100 mm (4″) 115 mm (4-1/2″) 125 mm (5″) Épaisseur max. de la meule 6,4 mm Filetage de l’axe M10 M14 ou 5/8″ (selon le pays) Vitesse nominale (n) 8 500 min