Makita MT240 User Manual

Portable Cut-Off

MODEL MT240

DOUBLE
INSULATION

INSTRUCTION MANUAL

WARNING:

For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

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SPECIFICATIONS

Model MT240

Wheel diameter 355 mm

Hole diameter 25.4 mm

-1

No load speed (min

Dimensions (L x W x H) 500 mm x 280 mm x 620 mm

Net weight 15.9 kg

Safety class

)

• Manufacturer reserves the right to change specifications without notice.

• Specifications may differ from country to country.

SYMBOLS

END201-2

The following show the symbols used for the
tool. Be sure that you understand their
meaning before use.

...............Read instruction manual.

Intended use

The tool is intended for cutting in masonry
and ferrous materials with appropriate abra­sive cut-off wheel.

Power supply

The tool should be connected only to a

...............DOUBLE INSULATION

power supply of the same voltage as indi­cated on the nameplate, and can only be
operated on single-phase AC supply. They
are double-insulated in accordance with

..............Only for EU countries

European Standard and can, therefore, also
be used from sockets without earth wire.

Do not dispose of electric
equipment together with
household waste material!

In observance of European
Directive 2002/96/EC on
waste electric and electronic
equipment and its implemen­tation in accordance with
national law, electric equip­ment that have reached the
end of their life must be col­lected separately and
returned to an environmen-

For public low-voltage distribution
systems of between 220 V and 250 V.

Switching operations of electric apparatus
cause voltage fluctuations. The operation of
this device under unfavorable mains condi­tions can have adverse effects to the opera­tion of other equipment. With a mains
impedance equal or less than 0.31 Ohms it
can be presumed that there will be no nega­tive effects. The mains socket used for this
device must be protected with a fuse or pro­tective circuit breaker having slow tripping
characteristics.

tally compatible recycling
facility.

3,800

/II

2

For European countries only

Noise and Vibration

The typical A-weighted noise levels are
sound pressure level: 98 dB (A)
sound power level: 111 dB (A)

following standards of standardized docu­ments, EN61029, EN55014, EN61000 in
accordance with Council Directives, 73/23/
EEC, 89/336/EEC, 98/37/EC.

Yasuhiko Kanzaki CE 2002

– Wear ear protection. –

The typical weighted root mean square
acceleration value is not more than 2.5 m/s

EC-DECLARATION OF CONFORMITY

We declare under our sole responsibility

2

.

MAKITA INTERNATIONAL EUROPE LTD.

Michigan Drive, Tongwell, Milton Keynes,
Bucks MK15 8JD, ENGLAND

Director

that this product is in compliance with the

SAFETY INSTRUCTIONS ENA001-2

WARNING:

When using electric tools, basic safety precautions, including
the following, should always be followed to reduce the risk of
fire, electric shock and personal injury. Read all these
instructions before operating this product and save these
instructions.

For safe operations:

1. Keep work area clean.

Cluttered areas and benches invite injuries.

2. Consider work area environment.

Do not expose power tools to rain. Do not use
power tools in damp or wet locations. Keep
work area well lit. Do not use power tools
where there is risk to cause fire or explosion.

3. Guard against electric shock.

Avoid body contact with earthed or grounded
surfaces(e.g. pipes, radiators, ranges, refrig­erators).

4. Keep children away.

Do not let visitors touch the tool or extension
cord. All visitors should be kept away from
work area.

5. Store idle tools.

When not in use, tools should be stored in a

dry, high or locked up place, out of reach of
children.

6. Do not force the tool.

It will do the job better and safer at the rate for
which it was intended.

7. Use the right tool.

Do not force small tools or attachments to do
the job of a heavy duty tool. Do not use tools
for purposes not intended; for example, do
not use circular saws to cut tree limbs or logs.

8. Dress properly.

Do not wear loose clothing or jewellery, they
can be caught in moving parts. Rubber
gloves and non-skid footwear are recom­mended when working outdoors. Wear pro­tecting hair covering to contain long hair.

9. Use safety glasses and hearing protec­tion.

3

Also use face or dust mask if the cutting oper­ation is dusty.

10. Connect dust extraction equipment.

If devices are provided for the connection of
dust extraction and collection facilities ensure
these are connected and properly used.

11. Do not abuse the cord.

Never carry the tool by the cord or yank it to
disconnect it from the socket. Keep the cord
away from heat, oil and sharp edges.

12. Secure work.

Use clamps or a vice to hold the work. It is
safer than using your hand and it frees both
hands to operate the tool.

13. Do not overreach.

Keep proper footing and balance at all times.

14. Maintain tools with care.

Keep cutting tools sharp and clean for better
and safer performance. Follow instructions
for lubrication and changing accessories.
Inspect tool cord periodically and if damaged
have it repaired by an authorized service
facility. Inspect extension cords periodically
and replace, if damaged. Keep handles dry,
clean and free from oil and grease.

15. Disconnect tools.

When not in use, before servicing and when
changing accessories such as blades, bits
and cutters.

16. Remove adjusting keys and wrenches.

Form the habit of checking to see that keys
and adjusting wrenches are removed from
the tool before turning it on.

17. Avoid unintentional starting.

Do not carry a plugged-in tool with a finger on

the switch. Ensure switch is off when plug­ging in.

18. Use outdoor extension leads.

When tool is used outdoors, use only exten­sion cords intended for outdoor use.

19. Stay alert.

Watch what you are doing. Use common
sense. Do not operate tool when you are
tired.

20. Check damaged parts.

Before further use of the tool, a guard or
other part that is damaged should be care­fully checked to determine that it will operate
properly and perform its intended function.
Check for alignment of moving parts, free
running of moving parts, breakage of parts,
mounting and any other conditions that may
affect its operation. A guard or other part that
is damaged should be properly repaired or
replaced by an authorized service center
unless otherwise indicated in this instruction
manual. Have defective switches replaced by
an authorized service facility. Do not use the
tool if the switch does not turn it on and off.

21. Warning.

The use of any accessory or attachment,
other than those recommended in this
instruction manual or the catalog, may
present a risk of personal injury.

22. Have your tool repaired by a qualified per­son.

This electric tool is in accordance with the rel­evant safety requirements. Repairs should
only be carried out by qualified persons using
original spare parts, otherwise this may result
in considerable danger to the user.

ADDITIONAL SAFETY RULES FOR TOOL ENB066-1

1. Wear protective glasses. Also wear hear­ing protection during extended periods of
operation.

2. Use only wheels recommended by the
manufacturer which have a maximum

operating speed at least as high as “No
Load RPM” marked on the tool’s name­plate. Use only fiberglass-reinforced cut­off wheels.

4

3. Check the wheel carefully for cracks or
damage before operation. Replace
cracked or damaged wheel immediately.

4. Secure the wheel carefully.

5. Use only flanges specified for this tool.

6. Be careful not to damage the spindle,

flanges (especially the installing surface)
or bolt, or the wheel itself might break.

7. Keep guards in place and in working
order.

8. Hold the handle firmly.

9. Keep hands away from rotating parts.

10. Make sure the wheel is not contacting the

work-piece before the switch is turned on.

11. Before using the tool on an actual work­piece, let it simply run for several minutes
first. Watch for flutter or excessive vibra­tion that might be caused by poor installa­tion or a poorly balanced wheel.

12. Watch out for flying sparks when operat­ing. They can cause injury or ignite com­bustible materials.

13. Remove material or debris from the area
that might be ignited by sparks. Be sure
that others are not in the path of the
sparks. Keep a proper, charged fire extin­guisher closely available.

14. Use the cutting edge of the wheel only.
Never use side surface.

15. If the wheel stops during the operation,
makes an odd noise or begins to vibrate,
switch off the tool immediately.

16. Always switch off and wait for the wheel
to come to a complete stop before remov­ing, securing workpiece, working vise,
changing work position, angle or the
wheel itself.

17. Do not touch the workpiece immediately
after operation; it is extremely hot and
could burn your skin.

18. Store wheels in a dry location only.

SAVE THESE INSTRUCTIONS

5

INSTALLATION

1

2

1. Base

2. Bolt holes

003980

Securing cut-off

This tool should be bolted with two bolts to a level and stable
surface using the bolt holes provided in the tool’s base. This
will help prevent tipping and possible personal injury.

FUNCTIONAL
DESCRIPTION

1. Lock button/Lock-off button

2. Switch trigger

CAUTION:

• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.

003981

Switch action

2

1

CAUTION:

• Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.

For tool with lock button

To start the tool, simply pull the switch trigger. Release the
switch trigger to stop.
For continuous operation, pull the switch trigger and then
push in the lock button.
To stop the tool from the locked position, pull the switch trig­ger fully, then release it.

For tool with lock-off button

To prevent the switch trigger from being accidentally pulled, a
lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.

CAUTION:

• When not using the tool, remove the lock-off button and
store it in a secure place. This prevents unauthorized
operation.

6

(B)

(A)

1. Stopper plate

4

1. Socket wrench

2. Guide plate

3. Move

4. Hex bolts

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1

1

Stopper plate (except for European countries)

The stopper plate prevents the cut-off wheel from contacting
the workbench or floor. When a new wheel is installed, set
the stopper plate to position (A). When the wheel wears
down to the extent that the lower portion of the workpiece is
left uncut, set the stopper plate to position (B) to allow
increased cutting capacity with a worn down wheel.

003983

1
2

Interval between vise and guide plate

The original spacing or interval between the vise and the
guide plate is 0 - 170 mm. If your work requires wider spac­ing or interval, proceed as follows to change the spacing or

3

interval.

Remove the two hex bolts which secure the guide plate.
Move the guide plate as shown in the figure and secure it
using the hex bolts. The following interval settings are possi­ble:

35 - 205 mm

70 - 240 mm

003759

CAUTION:

• Remember that narrow workpieces may not be secured
safely when using the two, wider interval settings.

3

1. Socket wrench

2. Guide plate

3. Hex bolts

1
2

003984

Setting for desired cutting angle

To change the cutting angle, loosen the two hex bolts which
secure the guide plate. Move the guide plate to the desired
angle (0° - 45°) and tighten the hex bolts securely.

CAUTION:

• Never perform right miter cuts when the guide plate is
set at the 35 - 205 mm or 70 - 240 mm position.

7

ASSEMBLY

1

1. Shaft lock

2. Wheel guard

3. Socket wrench

1

2

3

45

1. O ring

2. Inner flange

3. Ring

4. Spindle

5. Cut-off wheel

6. Outer flange

7. Hex bolt

003985

003762

6

CAUTION:

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

Removing or installing cut-off wheel (Accessory)

2

To remove the wheel, raise the wheel guard. Press the shaft
lock so that the wheel cannot revolve and use the socket

3

wrench to loosen the hex bolt by turning it counterclockwise.
Then remove the hex bolt, outer flange and wheel. (Note: Do
not remove the inner flange, ring and O-ring.)

To install the wheel, follow the removal procedures in
reverse.

7

CAUTION:

• Be sure to tighten the hex bolt securely. Insufficient
tightening of the hex bolt may result in severe injury. Use
the socket wrench provided to help assure proper
tightening.

• Always use only the proper inner and outer flanges
which are provided with this tool.

• Always lower the wheel guard after replacing the wheel.

1. Vise plate

2. Vise nut

3. Vise handle

003986

1

Securing workpiece

By turning the vise handle counterclockwise and then flipping

2

the vise nut to the back, the vise is released from the shaft
threads and can be moved rapidly in and out. To grip work­pieces, push the vise handle until the vise plate contacts the

3

workpiece. Flip the vise nut to the front and then turn the vise
handle clockwise to securely retain the workpiece.

CAUTION:

• Always set the vise nut to the front fully when securing
the workpiece. Failure to do so may result in insufficient
securing of the workpiece. This could cause the

8

1

1. Spacer block

1

2

3

1. Guide plate

2. Straight piece of wood (Spacer)

3. Over 85mm long

5

1

003987

003988

003989

2

3

workpiece to be ejected or cause a dangerous breakage
of the wheel.

When the cut-off wheel has worn down considerably, use a
spacer block of sturdy, non-flammable material behind the
workpiece as shown in the figure. You can more efficiently
utilize the worn wheel by using the mid point on the periphery
of the wheel to cut the workpiece.

When cutting workpieces over 85 mm wide at an angle,
attach a straight piece of wood (spacer) to the guide plate as
shown in the figure. Attach this spacer with screws through
the holes in the guide plate.

If you use a spacer block which is slightly narrower than the
workpiece as shown in the figure, you can also utilize the
wheel economically when worn down the wheel.

4

1. Diameter of wprkpiece

2. Guide plate

3. Spacer block

4. Width of spacer block

5. Vise

11

1. Blocks

003990

Long workpieces must be supported by blocks of non-flam­mable material on either side so that it will be level with the
base top.

9

OPERATION

Hold the handle firmly. Switch on the tool and wait until the
wheel attains full speed before lowering gently into the cut.
When the wheel contacts the workpiece, gradually bear
down on the handle to perform the cut. When the cut is com­pleted, switch off the tool and WAIT UNTIL THE WHEEL
HAS COME TO A COMPLETE STOP before returning the
handle to the fully elevated position.

CAUTION:

• Proper handle pressure during cutting and maximum
cutting efficiency can be determined by the amount of
sparks that is produced while cutting. Your pressure on
the handle should be adjusted to produce the maximum
amount of sparks. Do not force the cut by applying
excessive pressure on the handle. Reduced cutting
efficiency, premature wheel wear, as well as, possible
damage to the tool, cut-off wheel or workpiece may
result.

Cutting capacity

Max. cutting capacity varies depending upon the cutting
angle and workpiece shape. Applicable wheel diameter:
355 mm

Cutting
angle

Workpiece

shape

90˚

45˚

115mm 119mm

115mm 106 mm

003992

Carrying tool

Fold down the tool head to the position where you can attach
the chain to the hook on the handle.

10

102 mm × 194 mm

70 mm × 233 mm

115 mm × 103 mm

003991

137 mm

100 mm

MAINTENANCE

5

1

1. Limit mark

1

2

1. Screwdriver

2. Brush holder cap

CAUTION:

• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.

00114

Replacing carbon brushes

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.

003993

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.

To maintain product SAFETY and RELIABILITY, repairs, any
other maintenance or adjustment should be performed by
Makita Authorized Service Centers, always using Makita
replacement parts.

11

884491C227

Makita Corporation Anjo, Aichi, Japan