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5 ENGLISH

Fragments of workpiece or of a broken accessory 

may fly 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 flammable 

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.

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 firm 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 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 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.

3. 

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 operator from broken wheel fragments, acci-

dental contact with 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 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 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.

 Wheel intended for larger power tool 

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 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.

4. 

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.

Summary of Contents for DGA458

Page 1: ...INSTRUCTION MANUAL Cordless Angle Grinder DGA408 DGA458 DGA508 ENGLISH Original instructions Read before use ...

Page 2: ...eached the end of their life must be col lected separately and returned to an envi ronmentally compatible recycling facility 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 DGA458 Sound pressure level LpA 80 dB A Uncertainty K 3 dB A Model DGA508 ...

Page 3: ...ify the plug in any way Do not use any adapter plugs with earthed grounded power tools Unmodified plugs and matching outlets will reduce risk of electric shock 2 Avoid body contact with earthed or grounded surfaces such as pipes radiators ranges and refrigerators There is an increased risk of elec tric shock if your body is earthed or grounded 3 Do not expose power tools to rain or wet con ditions...

Page 4: ...r lubricating and chang ing accessories 3 Keep handles dry clean and free from oil and grease Cordless 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 illus trations and specifications provided with this ...

Page 5: ... 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 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 des...

Page 6: ...ed hole wheel ensure that the thread in the wheel is long enough to accept the spindle length 13 Check that the workpiece is properly supported 14 Pay attention that the wheel continues to rotate after the tool is switched off 15 If working place is extremely hot and humid or badly polluted by conductive dust use a short circuit breaker 30 mA to assure opera tor safety 16 Do not use the tool on an...

Page 7: ...ing 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 car tridge firmly when installing or removing battery cartridge Failure to hold the tool and the battery cartridge firmly may cause them to slip off your hands and result in damage to the tool a...

Page 8: ...n some conditions the indicators light up 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...

Page 9: ...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 first release the switch lever Then pull the lock...

Page 10: ... 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 1...

Page 11: ...wrench and securely tighten clockwise 1 2 1 Lock nut wrench 2 Shaft lock To remove the wheel follow the installation procedure in reverse Installing or removing flex wheel Optional accessory WARNING Always use supplied guard when flex wheel is on tool Wheel can shatter during use and guard helps to reduce chances of personal injury 1 2 3 4 1 Lock nut 2 Flex wheel 3 Back up pad 4 Inner flange Follo...

Page 12: ...ding 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 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 ba...

Page 13: ... 4 4 2 3 1 Lock nut 2 Diamond wheel Thinner than 4mm 5 32 3 Diamond wheel 4mm 5 32 or thicker 4 Inner flange For 115 mm 4 1 2 125 mm 5 model When installing the abrasive cut off wheel 1 1 4 4 2 3 1 Lock nut 2 Abrasive cut off wheel Thinner than 4mm 5 32 3 Abrasive cut off wheel 4mm 5 32 or thicker 4 Inner flange When installing the diamond wheel 1 1 4 4 2 3 1 Lock nut 2 Diamond wheel Thinner than ...

Page 14: ...chances of personal injury 1 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 CA...

Page 15: ... 2 model 125 mm 5 model 1 Grip 36 2 Wheel Guard for grinding wheel 3 Inner flange 4 Depressed center wheel Flap disc 5 Lock nut 6 Back up pad 7 Flex wheel 8 Inner flange 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 Eu...

Page 16: ...885471A226 EN 20151001 www makita com Makita Europe N V Makita Corporation 3 11 8 Sumiyoshi cho Anjo Aichi 446 8502 Japan Jan Baptist Vinkstraat 2 3070 Kortenberg Belgium ...

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