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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. 

• 

NEVER use cut-off wheel for side grinding. 

• 

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. 

• 

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. 

• 

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. 

• 

A diamond wheel shall be operated perpendicular 
to the material being cut. 

MAINTENANCE 

 

CAUTION: 

• 

Always be sure that the tool is switched off and 
unplugged before carrying out any work on the tool. 

• 

Never use gasoline, benzine, thinner, alcohol or the 
like. Discoloration, deformation or cracks may 
result. 

Replacement of carbon brushes 

1

 

 

001145 

Remove and check the carbon brushes regularly. 
Replace when they wear down to the limit mark. Keep 
the carbon brushes clean and free to slip in the holders. 
Both carbon brushes should be replaced at the same 
time. Use only identical carbon brushes. 
Use a screwdriver to remove the brush holder caps. Take 
out the worn carbon brushes, insert the new ones and 
secure the brush holder caps. 

1

2

 

 

003569 

To maintain product safety and reliability, repairs, 
maintenance or adjustment should be carried out by 
Makita Authorized Service Center. 

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 for more details regarding 
these accessories, ask your local Makita Service Center. 

• 

Wheel guard (Wheel cover) For depressed center 
wheel / Multi disc 

• 

Wheel guard (Wheel cover) For abrasive cut-off 
wheel / diamond wheel 

• 

Depressed center wheels 

• 

Abrasive cut-off wheels 

• 

Multi discs 

• 

Diamond wheels 

• 

Wire cup brushes 

• 

Wire bevel brush 85 

• 

Abrasive discs 

• 

Inner flange 

• 

Lock nut For depressed center wheel / abrasive 
cut-off wheel / multi disc / diamond wheel 

• 

Lock nut For abrasive disc 

• 

Lock nut wrench 

• 

Side grip 

• 

Rubber pad 

1. Brush holder cap
2. Screwdriver 

1. Limit mark 

Summary of Contents for MGA400

Page 1: ...1 ENGLISH Original instructions INSTRUCTION MANUAL DOUBLE INSULATION IMPORTANT Read Before Using Angle Grinder MGA400 MGA450 MGA500 003565 ...

Page 2: ...o be used from sockets without earth wire GEA005 3 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 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 opera...

Page 3: ... dangerous and must be repaired 20 Disconnect the plug from the power source and or the battery pack 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 21 Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or the...

Page 4: ...trol 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 ...

Page 5: ...the cut while the wheel is in motion otherwise kickback may occur Investigate and take corrective action to eliminate the cause of wheel binding d Do not restart the cutting operation in the workpiece Let the wheel reach full speed and carefully reenter the cut The wheel may bind walk up or kickback if the power tool is restarted in the workpiece e Support panels or any oversized workpiece to mini...

Page 6: ...metallic objects and avoid damaging internal parts 36 When use cut off wheel always work with the dust collecting wheel guard required by domestic regulation 37 Cutting discs must not be subjected to any lateral pressure 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 ...

Page 7: ... and unplugged before installing or removing the wheel Mount the inner flange onto the spindle THE SIDE WITH THE RUBBER SURFACE SHOULD CONTACT THE WHEEL for rubber molded inner flange only Fit the wheel on over the inner flange and screw the lock nut onto the spindle To tighten the lock nut press the shaft lock firmly so that the spindle cannot revolve then use the lock nut wrench and securely tig...

Page 8: ...nner flange varies by wheel thickness Refer to the table below Abrasive cut off wheel Diamond wheel Thickness Less than 4 mm 5 32 Thickness 4 mm 5 32 or more 16 mm 5 8 20 mm 13 16 22 23 mm 7 8 Abrasive cut off wheel Diamond wheel Thickness Less than 4 mm 5 32 Thickness 4 mm 5 32 or more Thickness Less than 4 mm 5 32 Thickness 4 mm 5 32 or more Thickness Less than 4 mm 5 32 Thickness 4 mm 5 32 or m...

Page 9: ...esult Replacement of carbon brushes 1 001145 Remove and check the carbon brushes regularly Replace when they wear down to the limit mark Keep the carbon brushes clean and free to slip in the holders Both carbon brushes should be replaced at the same time Use only identical carbon brushes Use a screwdriver to remove the brush holder caps Take out the worn carbon brushes insert the new ones and secu...

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Page 12: ...12 Makita Corporation www makita com 884731B7 ...

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