Hitachi Koki CM 4ST User manual

Cutter
Model CM 4ST
Handling instructions
Note:
Before using this Electric Power Tool, carefully read through these
Handling Instructions to ensure efficient, safe operation. It is
recommended that these Instructions be kept readily available as
an important reference when using this power tool.
(Diamond wheel is not supplied.)
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2
1
Wing bolt
Loosen
Tighten
Cutting depth
adjustment link Base
2
Washer (B)
Washer (A)
Bolt (left
hand screw)
Diamond wheel
Spindle
3
Wrench
4
Guide line
on the base
Guide line
on the base
Cutting line
Base
5
17mm
6mm
43
Wear limit
No. of carbon brush
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3
GENERAL SAFETY RULES
WARNING!
Read all instructions
Failure to follow all instructions listed below may result in
electric shock, fire and/or serious injury.
The term “power tool” in all of the warnings listed below
refers to your mains operated (corded) power tool or battery
operated (cordless) power tool.
SAVE THESE INSTRUCTIONS
1) Work area
a) Keep work area clean and well lit.
Cluttered and dark areas invite accidents.
b) Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust.
Power tools create sparks which may ignite the dust
of fumes.
c) Keep children and bystanders away while
operating a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) Power tool plugs must match the outlet.
Never modify 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.
b) Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators.
There is an increased risk of electric shock if your
body is earthed or grounded.
c)
Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electric shock.
d) Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges or
moving parts.
Damaged or entangled cords increase the risk of
electric shock.
e) When operating a power tool outdoors, use an
extension cord suitable for outdoor use.
Use of a cord suitable for outdoor use reduces the
risk of electric shock
3) Personal safety
a) Stay alert, watch what you are doing and use
common sense when operating a power tool.
Do not use a power tool while you are tired or under
the influence of drugs, alcohol or medication.
A moment of inattention while operating power tools
may result in serious personal injury.
b)
Use safety equipment. Always wear eye protection.
Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal
injuries.
c) Avoid accidental starting. Ensure the switch is
in the offposition before plugging in.
Carrying power tools with your finger on the switch
or plugging in power tools that have the switch on
invites accidents.
d) Remove any adjusting key or wrench before
turning the power tool on.
A wrench or a key left attached to a rotating part of
the power tool may result in personal injury.
e) Do not overreach. Keep proper footing and
balance at all times.
This enables better control of the power tool in
unexpected situations.
f) Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing and gloves
away from moving parts.
Loose clothes, jewellery or long hair can be caught
in moving parts.
g) If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used.
Use of these devices can reduce dust related
hazards.
4) Power tool use and care
a) Do not force the power tool. Use the correct
power tool for your application.
The correct power tool will do the job better and
safer at the rate for which it was designed.
b) Do not use the power tool if the switch does not
turn it on and off.
Any power tool that cannot be controlled with the
switch is dangerous and must be repaired.
c) Disconnect the plug from the power source
before making any adjustments, changing
accessories, or storing power tools.
Such preventive safety measures reduce the risk of
starting the power tool accidentally.
d)
Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power
tool or these instructions to operate the power tool.
Power tools are dangerous in the hands of untrained
users.
e) Maintain power tools. Check for misalignment
or binding of moving parts, breakage of parts
and any other condition that may affect the
power tools operation.
If damaged, have the power tool repaired before use.
Many accidents are caused by poorly maintained
power tools.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control.
g) Use the power tool, accessories and tool bits
etc., in accordance with these instructions and
in the manner intended for the particular type
of power tool, taking into account the working
conditions and the work to be performed.
Use of the power tool for operations different from
intended could result in a hazardous situation.
5) Service
a) Have your power tool serviced by a qualified
repair person using only identical replacement
parts.
This will ensure that the safety of the power tool is
maintained.
PRECAUTION
Keep children and infirm persons away.
When not in use, tools should be stored out of reach of
children and infirm persons.
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CUT-OFF MACHINE SAFETY WARNINGS
a) The guard provided with the tool must be securely
attached to the power tool and positioned for
maximum safety, so the least amount of wheel is
exposed towards the operator. Position yourself and
bystanders away from the plane of the rotating wheel.
The guard helps to protect operator from broken wheel
fragments and accidental contact with wheel.
b) Use only diamond cut-offwheels for your power
tool. Just because an accessory can be attached to
your power tool, it does not assure safe operation.
c) 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 fly apart.
d) 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.
e) The arbour size of wheels and flanges must properly
fit the spindle of the power tool. Wheels and flanges
with arbour holes that do not match the mounting
hardware of the power tool will run out of balance,
vibrate excessively and may cause loss of control.
f) Do not use damaged wheels. Before each use,
inspect the wheels for chips and cracks. If power
tool or wheel is dropped, inspect for damage or
install an undamaged wheel. After inspecting
and installing the wheel, position yourself and
bystanders away from the plane of the rotating
wheel and run the power tool at maximum no load
speed for one minute. Damaged wheels will normally
break apart during this test time.
g) Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and shop apron capable
of stopping small abrasive or workpiece fragments.
The eye protection must be capable of stopping flying
debris generated by various operations. The dust mask
or respirator must be capable of filtrating particles
generated by your operation. Prolonged exposure to
high intensity noise may cause hearing loss.
h) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken wheel may fly away and cause
injury beyond immediate area of operation.
i) Hold the power tool by insulated gripping surfaces
only, when performing an operation where the
cutting accessory may contact hidden wiring or its
own cord. Cutting accessory contacting a "live" wire
may make exposed metal parts of the power tool "live"
and could give the operator an electric shock.
j) Position the cord clear of the spinning accessory. If
you lose control, the cord may be cut or snagged and
your hand or arm may be pulled into the spinning wheel.
k)
Never lay the power tool down until the accessory has
come to a complete stop. The spinning wheel may grab
the surface and pull the power tool out of your control.
l) 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.
m) 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.
n) Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
o) 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. Pinching or snagging causes rapid stalling
of the rotating wheel which in turn causes the uncontrolled
power tool to be forced in the direction opposite of the
wheel’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 movement 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.
a)
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 kickback
forces, if proper precautions are taken.
b) Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
c) Do not position your body in line with the rotating
wheel. Kick back will pr o pel the too l i n direct i on oppo s i te
to the wheel’s movement at the point of snagging.
d) 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.
e) Do not attach a saw chain, woodcarving blade,
segmented diamond wheel with a peripheral gap
greater than 10 mm or toothed saw blade. Such
blades create frequent kickback and loss of control.
f) 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 or wheel breakage.
g) When wheel is binding or when interrupting a cut
for any reason, switch offthe power tool and hold
the power tool motionless until the wheel comes to
a complete stop. Never attempt to remove the wheel
from the cut while the wheel is in motion otherwise
kickback may occur. Investigate and take corrective
action to eliminate the cause of wheel binding.
h) Do not restart the cutting operation in the workpiece.
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.
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i) Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
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.
j) Use extra caution when making a “pocket cut” into
existing walls or other blind areas. The protruding
wheel may cut gas or water pipes, electrical wiring or
objects that can cause kickback.
PRECAUTIONS ON USING CUTTER
1. Do NOT use any cutting tool other than a diamond
wheel.
2. Don’t use it for cutting of metallic materials. Diamond
wheel may be broken or its service life may be
remarkably reduced when it is used for cutting of
metallic materials . Be sure not to use the wheel for
cutting of metals.
3. Be sure to take an earth leakage breaker or isolating
transformer as electric shock-preventive measures.
4. Pour on water while cutting or scribing concrete, tile or
stone.
5. Keep the motor interior free of water.
6. Wear protective glasses to protect your eyes while
cutting.
7. Prior to use, be sure to check the diamond wheel in such
details as crack, broken part, bent part and the like.
Don’t use a diamond wheel if any of the above detect
is found on the wheel. Also confirm that no abnormality
exists by actual test running.
8. Proceed with cutting operation when full speed has
been reached.
9. Do NOT apply excessive force.
10. When cutting concrete, tile, or stone, the maximum
cutting depth should be held to within 20mm.
11. Never touch diamond wheel while operating.
12. Never lay down the cutter while the diamond wheel is
revolving.
13. Exercise care to position the cutter at a safe, stable spot
when cutting.
14. Take good care of the power tool and keep it clean.
SPECIFICATIONS
Voltage 230 V
Power Input 1300 W
No-Load Speed 13000 /min
Max. cutting depth 34 mm (wheel dia. 110 mm)
31.5 mm (wheel dia. 105 mm)
Diamond wheel 110 mm external dia. × 20 mm internal dia.
Weight (without cord) 2.9 Kg
STANDARD ACCESSORIES
Wrench...............................................................................2
Standard accessories are subject to change without notice.
OPTIONAL ACCESSORIES (sold separately)
1Diamond Wheel
A Type B Type
Diameter
(mm)
Hole
(mm)
Thickness
(mm)
Blade
type
A (Dry) 106 20 1.2
B (wet) 110 20 1
2Water Plug (with machine screw)
3Rubber Connector
4Vinyl Hose
3
24
Optional accessories are subject to change without notice.
APPLICATIONS
○Cutting and scribing of concrete.
○Cutting and scribing various types of stones.
○Cutting and scribing various types of tiles.
PRIOR TO OPERATION
1. Confirming the earth leakage breaker or isolating
transformer
Before using this Cutter, confirm that an earth leakage
breaker or isolating transformer as electric shock
preventive measures is installed at the power supply to
which the Cutter is connected.
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2. Power source
Ensure that the power source to be utilized conforms to the
power requirements specified on the product nameplate.
3. Power switch
Ensure that the power switch is in the OFF position. If
the plug is connected to a receptacle while the power
switch is in the ON position, the power tool will start
operating immediately, and can cause serious injury.
4. Extension cord
When the work area is far away from the power source,
use an extension cord of sufficient thickness and rated
capacity. The extension cord should be kept as short as
practicable.
5. Mounting the diamond wheel
For details, refer to the item “Mounting and dismounting
the diamond wheel”.
6. Confirm that the cutting depth adjusting lever is
securely clamped.
7. Cutting depth adjustment (Fig. 1)
○Loosen the cutting depth adjusting wing bolt and move
the base to adjust the depth.
○Tighten the wing bolt securely after adjusting the
cutting depth.
CAUTION
○Leaving the wing bolt loosened may result in injury.
Securely tighten the wing bolt after adjusting the cutting
depth.
○When the cutting depth exceeds 20mm, concrete, and
so on must be cut in two steps. Never try to cut in one
step; otherwise, the motor is liable to be overloaded
and damaged may result. Also, cutting efficiency will be
lower in such an instance.
MOUNTING AND DISMOUNTING THE
DIAMOND WHEEL
CAUTION
○Be sure to disconnect the attachment plug from the
power receptacle to avoid serious trouble.
○Stop pouring water and select a moisture-free location
for the operation mentioned above.
1. Mounting the diamond wheel
(1) Thoroughly remove dust accumulated on the spindle
and washers.
(2) As shown in Fig. 2, the concave portions of washers (A)
and (B) must be on the diamond wheel side.
(3) Thoroughly clamp the bolt.
2. Dismounting the diamond wheel
Use the provided wrenches to remove the bolt. (Fig. 3)
CAUTION
A diamond wheel for mounting on this equipment must
have 20mm internal diameter. No other sized diamond
wheel should be used.
CUTTING PROCEDURES
1. Set the machine body (base) on the material to be cut;
use the side on the base to align the diamond wheel
with the cutting line. (Fig. 4)
2. Turn the switch ON with the diamond wheel initially kept
offthe material to be cut.
The power switch is turned ON when the trigger is
pulled by one’s finger, and is turned OFF when the
trigger is released. The stopper is designed to prevent
inadvertent operation of the machine and the trigger will
not operate unless the stopper has first been pushed in.
Turn the machine ON with the diamond wheel initially
kept offthe material to be cut. The power switch is
turned ON by first depressing and holding down the
stopper, and then pulling the trigger with one’s finger.
Once the trigger is ON, the stopper may be released
and the tool may be operated by continuing to hold
the trigger. The power switch is turned OFF when the
trigger is released.
CAUTION
○Do NOT use the diamond wheel for cutting along curves
or at angles; otherwise, it may be damaged, resulting in
extremely shortened service life.
○Before starting to cut, confirm that the diamond wheel
has attained full-speed revolution.
○Should the diamond wheel stop or make an abnormal
noise while operating, promptly turn OFF the switch.
○Always take care in preventing the power cord from
coming near to the revolving diamond wheel.
○When finished with a job, pull out the plug from the
power receptacle.
MAINTENANCE AND INSPECTION
CAUTION
Be sure to switch power OFF and disconnect the
plug from the receptacle during maintenance and
inspection.
Using cracked, deformed or damaged wheels can lead
to wheel breakage and resulting serious injury.
1. Inspecting the diamond wheel
Since use of a dull diamond wheel will cause motor
malfunctioning and degraded efficiently, replace with a
new one without delay when abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all screws and ensure that they are
fully tightened. Should any of the screws be loosened,
retighten them immediately. Failure to do so could
result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very “heart” of the power
tool. Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes (Fig. 5)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with a new one having the same carbon brush
No. shown in the figure when it becomes worn to or
near the “wear limit”. In addition, always keep carbon
brushes clean and ensure that they slide freely within
the brush holders.
5. Replacing carbon brushes
Remove the brush caps and carbon brushes. After
replacing the carbon brushes, do not forget to tighten
the brush caps properly.
6. Service parts list
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool to
the Hitachi authorized Service Center when requesting
repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
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MODIFICATION
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without prior
notice.
NOTE
Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.
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55
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
17
18
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
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41
42
43
44
45
46
47
48
49
50
51
52
53
54
501
19
15
Item
No. Part Name Q’TY
1FANGUIDE 1 2O-RING 1 3HEX. HD. TAPPING SCREW
D5 × 65 2
4 BRUSH TERMINAL 2 5STATORASS'Y 1 6TERMINAL 2 7SEALPACKING 1 8 DUST SEAL 1 9 BALL BEARING 608VV 1
10 RUBBER COVER (B) 1
11 HANDLE COVER ASS'Y 1
12 SWITCH RUBBER COVER 1
13 MACHINE SCREW
(W/WASHER) M3.5 × 6 4
14 TRIGGER SWITCH 1
15 TERMINAL 2
16 HOUSING ASS'Y 1
17 NAME PLATE 1
18
TAPPING SCREW (W/FLANGE) D4 × 20 (BLACK)
3
19 HEX. SOCKET SET SCREW
M5 × 8 2
20 MACHINE SCREW
(W/WASHERS) M5 × 25 3
21 THRUST WASHER 1
22 BEARING LOCK 1
23 NOISE SUPPRESSOR 1
24 TERMINAL 2
25 TERMINAL 1
26 TAPPING SCREW
(W/FLANGE) D4 × 16 2
27 CORD CLIP 1
28 CORD ARMOR 1
29 CORD 1
30 BRUSH HOLDER 2
31 CARBON BRUSH 2
32 BRUSH CAP 2
33 WASHER (B) 1 33 WASHER (C) 1
34 O-RING (1AP-20) 1
35 BEARING CAP 1
Item
No. Part Name Q’TY
36 DISTANCE PIECE 1
37 BALL BEARING 6002VVCM 1
38 BEARING HOLDER 1
39 SPINDLE AND GEAR SET 1
40 BALL BEARING 606VVC2 1
41 GEAR COVER 1
42 PINION 1
43 BALL BEARING 629VVC2 1
44 RUBBER RING 1
45 WASHER (A) 1
46 WOODRUFF KEY 2.5 × 8 1
47 ARMATURE 1
48 SEAL LOCK SCREW
(W/SP. WASHER) M5 × 25 2
49 BOLT (LEFT HAND) M7 × 15 1 50 WASHER (A) 1
51 ROLL PIN D6 × 32 (10 PCS.) 1
52 BASE 1
53 SLEEVE 1
54 SPRING WASHER M6
(10 PCS.) 1
55 WING BOLT M6 × 37 1
501 WRENCH 2
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510
Code No. C99192711 I
Printed in India
Hitachi Koki Co.,Ltd.
Shinagawa Intercity Tower A, 15-1, Konan 2-chome,
Minato-ku, Tokyo, Japan
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