background image

Grinding and sanding operation 

15°

   

001651 

Hold the tool firmly. 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 tool in the B direction or it will cut 
into the workpiece. Once the edge of the wheel has been 

rounded off by use, the wheel may be worked in both A 
and B directions. 

Operation with abrasive cut-off / diamond 
wheel (optional accessory) 

1

2

3

4

 

 

010855 

The direction for mounting the lock nut and the inner 
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

1

6 mm (

5

/8")

20 mm (

1

3/

1

6")

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 more

22.23 mm (7/8")

22.23 mm (7/8")

22.23 mm (7/8")

1

6 mm (

5

/8")

20 mm (

1

3/

1

6")

1

2

3

1

4

3

1

. Lock nut       2. Abrasive cut-off wheel        3. Inner flange         4. Diamond wheel

1

00 mm (4")

115

 mm (4 - 

1

/2") / 

1

2

5

 mm (

5

")

1

. Lock nut       2. Abrasive cut-off wheel        3. Inner flange         4. Diamond wheel

1

2

3

1

4

3

 

010848 

 
 

 

 

 

 

 

1. Lock nut 
2. Abrasive cut-off 

wheel/diamond 
wheel 

3. Inner flange 
4. Wheel guard for 

abrasive cut-off 
wheel/diamond 
wheel 

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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