Metabo HPT CM4SB2 Dry Cut Masonry Saw Instruction Manual
- June 16, 2024
- Metabo HPT
Table of Contents
Model
CM4SB2
Cutter
HPT
CM4SB2 Dry Cut Masonry Saw
CM4SB2 Dry Cut Masonry Saw
SAFETY INSTRUCTIONS AND INSTRUCTION MANUAL
WARNING
IMPROPER OR UNSAFE use of this power tool can result in death or serious
bodily injury!
This manual contains important information about product safety. Please read
and understand this manual BEFORE operating the power tool. Please keep this
manual available for other users and owners before they use the power tool.
This manual should be stored in safe place.
SAFETY
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-operated (cordless) power tool.
-
Work area safety
a) Keep work area clean and well lit.
Cluttered or 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 or fumes.
c) Keep children and bystanders away while operating a power tool.
Distractions can cause you to lose control. -
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 too! outdoors, use an extension cord suitable for outdoor use.
Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply.
Use of an RCD reduces the risk of electric shock. -
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 personal protective equipment. Always wear eye protection.
Protective equipment such as dust mask, non- skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool.
Carrying power tools with your finger on the switch or energising 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 dust collection can reduce dust-related hazards. -
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) Donotuse 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 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.
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 tool’s 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, taking into account the working conditions and the work to be performed.
Use of the power tool for operations different from those intended could result in a hazardous situation. -
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.
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 bonded reinforced or diamond cut-off wheels 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) 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.
e) Always use undamaged wheel flanges that are of correct diameter for your
selected wheel.
Proper wheel flanges support the wheel thus reducing the possibility of wheel
breakage.
f) 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.
g) 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.
h) 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.
i) Wear personal protective equipment. Depending on application, use face
shield, safety fo les or safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and shop aproncapable 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.
j) 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.
k) 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.
l) 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.
m) 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 too! out of your
control.
n) De 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.
0) 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.
p) Do not operate the power tool near flammable materials.
Sparks could ignite these materials.
q) Donot use accessories that require liquid coolants.
Using waiter 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 thatis 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) Maintaina 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.
Kickback will propel the tool in direction opposite 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 acut 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 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.
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.
SPECIFIC SAFETY RULES AND SYMBOLS
-
Hold tools by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or its own cord. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.
-
ALWAYS wear ear protectors when using the tool for extended periods.
Prolonged exposure to high intensity noise can cause hearing loss. -
NEVER touch moving parts.
NEVER place your hands, fingers or other body parts near the tool’s moving parts. -
NEVER operate without all guards in place.
NEVER operate this tool without all guards or safety features in place and in proper working order. If maintenance or servicing requires the removal of a guard or safety feature, be sure to replace the guard or safety feature before resuming operation of the tool. -
Use right tool.
Don’t force small tool or attachment to do the job of a heavy-duty tool.
Don’t use tool for purpose not intended —for example— don’t use circular saw for cutting tree limbs or logs. -
NEVER use a power tool for applications other than those specified.
NEVER use a power tool for applications other than those specified in the Instruction Manual. -
Handle tool correctly.
Operate the tool according to the instructions provided herein. Do not drop or throw the tool.
NEVER allow the tool to be operated by children, individuals unfamiliar with its operation or unauthorized personnel. -
Keep all screws, bolts and covers tightly in place.
Keep all screws, bolts, and plates tightly mounted.
Check their condition periodically. -
Do not use power tools if the plastic housing or handle is cracked.
Cracks in the tool’s housing or handle can lead to electric shock. Such tools should not be used until repaired. -
Blades and accessories must be securely mounted to the tool.
Prevent potential injuries to yourself or others.
Blades, cutting implements and accessories which have been mounted tc the tool should be secure and tight. -
Keep motor air vent clean.
The tool’s motor air vent must be kept clean so that air can freely flow at all times. Check for dust build-up frequently. -
Operate power tools at the rated voltage.
Operate the power tool at voltages specified on its nameplate.
If using the power tool at a higher voltage than the rated voltage, it will result in abnormally fast motor revolution and may damage the unit and the motor may burn out. -
NEVER use a tool which is defective or operating abnormally.
If the tool appears tc be operating unusually, making strange noises, or otherwise appears defective, stop using it immediately and arrange for repairs by a metaboHPT authorized service center. -
NEVER leave tool running unattended. Turn power off.
Don’‘tleave tool until it comes to a complete stop. -
Carefully handle power tools.
Should a power tool be dropped or struck against hard materials inadvertently, it may be deformed, cracked, or damaged. -
Do not wipe plastic parts with solvent. Solvents such as gasoline, thinner benzine, carbon tetrachloride, and alcohol may damage and crack plastic parts. Do not wipe them with such solvents.
Wipe plastic parts with a soft cloth lightly dampened with soapy water and dry thoroughly. -
ALWAYS wear eye protection that meets the requirement of the latest revision of ANSI Standard 287.1.
-
ALWAYS wear a mask or respirator to protect yourself from dust or potentially harmful particles generated during the operation.
-
Do Nor use any cutting tool other than a diamond wheel.
Use the diamond wheel specified in this manual. -
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. -
Donotstart the cutter while the diamond wheel is in contact with the material.
-
Keep the motor interior free of water.
-
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 defect is found on the wheel. Also confirm that no abnormality exists by actual test running.
-
Proceed with cutting operation when full speed has been reached.
-
Do NOT apply excessive force.
-
When cutting concrete, tile, or stone, the maximum ove depth should be held to within 25/32” (20 rmm).
-
Never lay down the cutter while the diamond wheel is revolving.
Also, do not stop the cutter with the diamond wheel forcibly depressed against the material. -
Exercise care to position the cutter at a safe, stable spot when cutting.
-
Take good care of the power tool and keep itclean.
-
Definitions for symbols used on this tool
V ………… VOltS
HZ………….. Hertz
A …………….. AMPOFES
ηo ………10 load speed
W…………… Watt
……….. Class Il Construction
–/min ….. revolutions per minute
DOUBLE INSULATION FOR SAFER OPERATION
To ensure safer operation of this power tool, metabo HPT has adopted a double
insulation design. “Double insulation “ means that two physically separated
insulation systems have been used to insulate the electrically conductive
materials connected to the power supply from the outer frame handled by the
operator.
Either the symbol “” or the words “Double
insulation” appear on the power tool or on the nameplate.
Although this system has no external grounding, you must still follow the
normal electrical safety precautions given in this Instruction Manual,
including not using the power tool in wet environments.
To keep the double insulation system effective, follow these precautions:
- Only metabo HPT AUTHORIZED SERVICE CENTER should disassemble or assemble this power tool, and only genuine metabo HPT replacement parts should be installed.
- Clean the exterior of the power tool only with a soft cloth moistened with soapy water, and dry thoroughly.
Never use solvents, gasoline or thinners on plastic components; otherwise the
plastic may dissolve.
SAVE THESE INSTRUCTIONS AND MAKE THEM AVAILABLE TO OTHER USERS AND OWNERS OF
THIS TOOL!
FUNCTIONAL DESCRIPTION
NOTE: The information contained in this Instruction Manual is designed to
assist you in the safe operation and maintenance of the power tool.
NEVER operate, or attempt any maintenance on the tool unless you have first
read and understood all safety instructions contained in this manual.
Some illustrations in this Instruction Manual may show details or attachments
that differ from those on your own power tool.
NAME OF PARTS
SPECIFICATIONS
| Motor | Single-Phase Series Commutator Motor |
|---|---|
| Power Source | Single-Phase 120 V AC 60 Hz / DC |
| Current | 11.6 A |
| No-Load Speed | 12,500/min |
| Max. cutting depth | 1-11/32″(34mm) (wheel dia. 4-3/8″(110mm)) |
1-15/64″(31.5mm) (wheel dia. 4-9/64″(105mm))
Diamond wheel| 4-3/8″(110mm) external dia. x 3/64″(1.2mm) thickness x
25/32″(20mm) internal dia.
Weight (without cord)| 6.17 lbs (2.8kg)
ASSEMBLY AND OPERATION
APPLICATIONS
- Cutting and scribing of concrete.
- Cutting and scribing various types of stones.
- Cutting and scribing various types of tiles.
PRIOR TO OPERATION
-
Power source
Ensure that the power source to be utilized conforms to the power source requirements specified on the product nameplate. -
Power switch
Ensure that the switch is in the OFF position. If the plug is connected to a receptacle while the switch is in the ON position, the power tool will start operating immediately and can cause serious injury. -
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.
WARNING: Damaged cord must be replaced or repaired. -
Check the receptacle
If the receptacle only loosely accepts the plug, the receptacle must be repaired. Contact a licensed electrician to make appropriate repairs.
If such a faulty receptacle is used, it may cause overheating, resulting in a serious hazard. -
Mounting the diamond wheel
For details, refer to the item “Mounting and dismounting the diamond wheel”. -
Confirm that the cutting depth adjusting lever is securely clamped.
-
Cutting depth adjustment (Fig. 2)
Lowering the lever will loosen and raising it will tighten.
Loosening the lever and moving the base will allow adjustment of the cutting depth.
CAUTION
- Leaving the lever loosened may result in injury. Securely tighten the lever after adjusting the cutting depth.
- When the cutting depth exceeds 25/32” (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 efficiently will be lower in such an instance.
MOUNTING AND DISMOUNTING THE DIAMOND WHEEL
CAUTION
- Besure to disconnect the attachment plug from the power receptacle to avoid serious trouble.
-
Mounting the diamond wheel
(1) Thoroughly remove dust accumulated on the spindle and washers.
(2) As shown in Fig. 3. the concave portions of washers (A) and (C) must be on the diamond wheel side.
(3) Thoroughly clamp the bolt. -
Dismounting the diamond wheel Use the provided wrench and box wrench to remove the bolt. (Fig. 4)
CAUTION
- A diamond wheel for mounting on this equipment must have 25/32” (20mm) internal diameter. No other sized diamond wheel should be used.
CUTTING PROCEDURES
- 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. 5)
- Turnthe switch ON with the diamond wheel initially kept off the material to be cut.
The power switch is turned ON when the trigger is pulled by one’s finger while the stopper is depressed, and 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.
- Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more securely than by hand.
WARNING: 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.
-
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. -
Inspecting the screws
Regularly inspect all screws and ensure that they are fully tightened. Should any of the screws be loosened, retighten them immediately.
WARNING: Using this cutter with loosened screws is extremely dangerous. -
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. -
Inspecting the carbon brushes (Fig. 6) The motor employs carbon brushes which are consumable parts. Replace the carbon brush with a new one when it becomes worn to its wear limit. Always keep carbon brushes clean and ensure that they slide freely within the brush holders.
CAUTION
• Using this grinder with a carbon brush which is worn in excess of the wear limit will damage the motor.
NOTE: Use metabo HPT carbon brush No. 43 indicated in Fig. 6.
• Replacing carbon brushes:
Loosen the set screw and remove the tail cover. Remove the brush caps and carbon brushes. After replacing the carbon brushes, do not forget to tighten the brush caps securely and to install the tail cover. -
Service and repairs
All quality power tools will eventually require servicing or replacement of parts because of wear from normal use. To assure that only authorized replacement parts will be used, all service and repairs must be performed by a metabo HPT AUTHORIZED SERVICE CENTER, ONLY. -
Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION: Repair, modification and inspection of metabo HPT Power Tools
must be carried out by a metabo HPT Authorized Service Center.
This Parts List will be helpful if presented with the tool to the metabo HPT
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.
MODIFICATIONS
metabo HPT Power Tools are constantly being improved and modified to
incorporate the latest technological advancements.
Accordingly, some parts (i.e. code numbers and/or design) may be changed
without prior notice.
ACCESSORIES
WARNING: atways use Only authorized metabo HPT replacement parts and
accessories. NEVER use replacement parts or accessories which are not intended
for use with this tool. Contact metabo HPT if you are not sure whether it is
safe to use a particular replacement part or accessory with your tool.
The use of any other attachment or accessory can be dangerous and could cause
injury or mechanical damage.
NOTE: Accessories are subject to change without any obligation on the
part of the metabo HPT.
STANDARD ACCESSORIES
-
Box Wrench (Code No. 940543) ………………………………………..1
-
Washer (Code No. 941057)……………………………………..1
-
Washer (B) (Code No. 944486) ……………………………………….1
Hole diameter 25/32” (20 mm) for Diamond Wheel -
Diamond Wheel (Code No. 728726) ………………………1
Diameter 4” (104 mm), Hole diameter 7/8” (22.2 mm)
NOTE: Specifications are subject to change without any obligation on the
part of the metabo HPT.
WARNING:
Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm. Some examples of these
chemicals are:
- Lead from lead-based paints,
- Crystalline silica from bricks and cement and other masonry products, and
- Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.
Issued by
Koki Holdings Co.,Ltd.
Shinagawa Intercity Tower A, 15-1, Konan 2-chome,
Minato-ku, Tokyo 108-6020, Japan
Distributed by Koki Holdings America Ltd.
1111 Broadway Ave,
Braselton, Georgia, 30517
Koki Holdings America Ltd. Canadian Branch
3405 American Drive, Units 9-10,
Mississauga, ON, L4V 1T6
806
Code No. C99148662 G
Printed in China
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