Neilsen CT5721 User manual

3" AIR CUT OFF TOOL CT5721
ORIGINAL INSTRUCTIONS
SAVE THESE INSTRUCTIONS AND PRECAUTIONS.
READ ALL PRECAUTONS AND INSTRUCTIONS BEFORE USE.
Cannon Tools Limited
Address: 20 Station Road, Rowley Regis, West Midlands, B65 0JU.U.K.

EC DECLARATION OF CONFORMITY
We CANNON TOOLS LTD
20 Station road, Rowley Regis, West Midlands,B65 0JU.U.K.
Declare that the following machine complies with the appropriate basic safety
and health requirements of the EC Directive based on its design and type, as
brought into circulation by us.
In case of alteration of the machine, not agreed upon by us, this declaration will
lose its validity.
Product description:3” AIR CUT OFF TOOL
Model: CT5721
Applicable EC Directives:
EC Machinery Directive 2006/42/EC
Harmonized standards
EN ISO 11148-7:2013-01
20 Station Road, Rowley Regis, West Midlands, B65 0JU.U.K.
Mr. Gurcharan Tony Singh Sanghera
Managing Director
CANNON TOOLS LTD
2020-08-31

1. SPECIFICATIONS
Model
CT5721
Max. Air pressure
8 bar
No load speed
18000rpm
Avg. air consumption
6 cfm
Cutting blade
3”
Angle
0o
Air inlet size
1/4”
Noise
LPA:90dB(A) LWA:101dB(A)
Vibration level
1.2 m/s2
2. SAFETY WARNINGS
WARNING! When operating a pneumatic tool, it is recommended that you
always observe basic safety principles, including those listed below, in order to
reduce the risk of fire, electric shock and injury.
Please read and keep the entirety of this instruction manual before using the tool.
CAUTION! Read all of the following instructions. Failure to do so may result in
electric shock, fire, or personal injury. The term “air tool” used in these
instructions refers to all tools operating by means of a compressed air stream at
the correct pressure.
General safety conditions
Due to multiple hazards, read and understand the safety instructions before
starting installation, operation, repair, maintenance and alteration of accessories
or when working in the vicinity of a air tool. Failure to do so may result in serious
injury. Air tools may only be installed, adjusted and assembled by qualified and
trained personnel. Do not modify the air tool. Modifications can reduce efficiency
and safety and increase the risk for the tool operator. Do not throw away the
safety instructions, they should be handed over to the tool operator. Do not use
the air tool if it is damaged.

Hazards connected with ejected parts
Damage to the workpiece, accessories or even to the inserted tool can result in
parts being ejected at high speeds. Always use impact-resistant eye protection.
The degree of protection must be selected according to the works carried out.
Make sure that the workpiece is securely clamped. Make sure that the disc is
securely attached to the cut off tool . Check whether the maximum speed of the
cutting disc, expressed in RPM, is equal to or higher than the rated speed of the
spindle. Make sure that the cutting disc guard is in place, in good condition and
properly mounted. Make sure that the cutting disc guard is checked regularly.
Regularly check whether the speed of the cut off tool is not higher than its rated
speed. The test should be carried out without the mounted cutting disc and in
accordance with the manufacturer’s instructions. Check whether the cutting disc
fixing flanges specified by the manufacturer have been used and are in good
condition, e.g. free from cracks, burrs and flat. Check whether the spindle and
the spindle thread are not damaged or worn. Make sure that sparks and waste
generated during operation are not hazardous. Disconnect the air tool from the
power source before replacing or repairing the cutting disc .
Hazards connected with entanglement
The Hazards connected with entanglement may cause choking, scalping and/or
cutting if loose clothing, jewellery, necklaces, hair or gloves are not kept away
from the tool or accessories.
Hazards connected with work
Avoid contact with the rotating spindle and the mounted cutting disc to prevent
cutting of hands and other body parts. Using the tool can expose the operator’s
hands to hazards such as crushing, impact, cutting, abrasion and heat.
Wear suitable gloves to protect your hands. The operator and the maintenance
personnel should be physically able to cope with the quantity, weight and power
of the tool. Hold the tool correctly. Be prepared to withstand normal or
unexpected movements and always keep both hands at the ready. Keep your
feet in balance and in a safe position. The pressure on the start and stop device
should be released in the event of a power failure. Use only the lubricants
recommended by the manufacturer. Protective goggles must be worn, and we
recommend wearing suitable gloves and protective clothing.

If working above the head, wear a protective helmet. When the movement of the
cutting disc stops, hold the disc all the time in such a position that it does not
come into contact with any object. The cut off tool can only be set down when the
cutting disc has come to a complete standstill. During cutting, the workpiece
should be supported in such a way that the cutting gap is maintained at a
constant or increasing width until the cutting is completed. If the cutting disc is
jammed in the cutting gap, switch off the tool and then release the cutting disc.
Before continuing to work, check whether the cutting disc is still correctly
mounted and has not been damaged. Cutting disc should not be used for lateral
grinding. Cut off tool must not be used beyond the maximum peripheral speed of
the cutting disc. The operator must ensure that there are no unauthorised
persons in the workplace area. Wear personal protective equipment such as:
fitted gloves, apron and a helmet. Sparks from work can ignite clothing and
cause severe burns. Make sure the sparks do not fall onto the clothing. Wear
fireproof clothing and keep a bucket of water near you.
Hazards connected with repetitive movements
When using an air tool for work entailing repetitive movements, the operator is
exposed to the discomfort of hands, arms, shoulders, neck or other parts of the
body. When using an air tool, the operator should take a comfortable posture
to ensure the feet are correctly positioned and avoid strange or unbalanced
postures. The operator should change the posture over a long period of time to
avoid discomfort and fatigue. If the operator experiences symptoms such as
persistent or repeated discomfort, pain, pulsating pain, tingling, numbness,
burning or stiffness, the operator is required to report the symptoms to the doctor.
The operator should not ignore them, should tell the employer about it and
consult a doctor.
Hazards connected with accessories
Disconnect the tool from the power supply before replacing the inserted tool or
accessory. Use accessories and consumables only in the sizes and types
recommended by the manufacturer. Do not use other types or sizes of
accessories. Make sure that the dimensions of the cutting disc are compatible
with those of the air cut off tool and that the cutting disc fits the spindle of the
tool. Check the cutting disc before use. Do not use cutting discs which have

(presumably) been dropped or are broken, have chipped fragments, are cracked
or are otherwise damaged. Before use, check that the cutting disc has been
correctly mounted and tightened. Start the unloaded tool for 1 minute in a safe
position. Stop it immediately if excessive vibration or other faults are observed,
then investigate the cause of the fault. Prevent the spindle tip from touching the
bottom of the bowls, cones or pivots with threaded holes intended for attachment
to machine spindles by checking their size and other data. If adapters or
reducing sleeves are supplied with the cutting disc, the user must ensure that the
adapter or the sleeve does not come into contact with the face of the fixing flange
and that the fixing forces are sufficient to prevent the disc from slipping during
rotation. If the fixing flanges are supplied in several types or sizes, always match
the correct flange(s) to the cutting disc used. Avoid direct contact with the
inserted tool during and right after work, as it can be hot or sharp. Store and
handle the cutting disc with care taken in accordance with the manufacturer’s
instructions.
Hazards connected with the workplace
Slips, stumbles and falls are the main causes of injury. Beware of slippery
surfaces caused by using the tool, as well as tripping hazards caused by the air
system. Handle with care in an unfamiliar environment. There may be hidden
hazards, such as electricity or other utility lines. The air tool is not intended for
use in potentially explosive zones and is not insulated from contact with
electricity. Make sure that there are no electric cables, gas pipes, etc. which
could pose a risk in the case of damage with the tool.
Personal safety
Wear personal protective equipment.Dust, noise, vibration and swarf can all be
dangerous if not suitably protected against. If the work involving the power tool
creates dust or fumes; wear a dust mask. Vibration to the hand, caused by
operating some tools for longer periods must be protected against. Wear
vibration reducing gloves and allow long breaks between uses. Protect against
dust and swarf by wearing approved safety goggles or a face shield. These are
some of the more common hazards and preventions; however, always find out
what hazards are associated with the machine/work process and wear the most
suitable protective equipment available.

Additional safety instructions for pneumatic tools
Pressurised air can cause serious injury:
- always disconnect the air supply, release the air pressure from the hose and
disconnect the tool from the air supply when not in use, before changing
accessories or carrying out repairs;
- never point the air stream at yourself or anyone else.
Hitting with the hose can cause serious injury. Always check for damaged or
loose hoses and connectors. Whenever universal screwed connections (dog
connections) are used, safety pins and safety connectors must be used to
prevent damage to the connections between the hoses and between the hose
and the tool. Do not exceed the maximum air pressure specified for the tool.
Never carry the tool holding it by the hose.
Caution! Tool kickback towards the operator
The kickback of the tool towards the operator is caused by a sudden reaction to a
locked or clamped cutting disc or other accessory. Locking or clamping causes a
rotating accessory to stop suddenly, which results in the pneumatic tool rotating
in the opposite direction to the accessory rotation. For example, if the cutting disc
is locked or clamped by the workpiece, the edge of the disc which reaches the
clamping point can sink in the surface of the material, causing the cutting disc to
escape or be ejected. The cutting disc can also escape towards or away from the
operator, depending on the direction of the disc movement at the clamping point.
The grinding wheels may also break in such conditions. The tool kickback
towards the operator is a result of misuse and/ or failure to follow the guidelines
in the User Manual. This occurrence can be avoided by following the instructions
below.
Use a firm grip on the tool and the correct position of the body and hands to
withstand the forces generated by the kickback. Always use an additional handle,
if supplied with the tool, to ensure maximum control during the kickback or any
unexpected rotation during the tool start. The operator will be able to control the
tool rotation or the kickback if appropriate precautions are taken. Keep your
hands away from rotating tool parts. The rotating parts can come into contact
with your hands, when kicked back. Do not stand in the area where the tool may
kick back. The kickback will direct the tool in the opposite direction to the
direction of the cutting disc rotation, at the clamping point. Pay special attention

when working near corners, sharp edges, etc. Prevent the cutting disc from
jumping and being jammed. When working corners or edges, there is an
increased risk of the disc jam, leading to a loss of control over the tool or its
kickback. Do not use cutting chain blades or circular saws. The blades cause
frequent kickbacks and the loss of control of the tool.
Warnings related to cutting with cutting disc
Use only tool specific cutting disc and guards that are designed for the type of
the grinding wheel in question. The cutting disc for which the tool is not designed
cannot be properly guarded and are not safe. The guard must be securely
attached to the tool and positioned for maximum safety so that the smallest
possible area of the disc is exposed towards the operator. This guard helps to
protect the operator from broken wheel fragments and prevents accidental
contact with the cutting disc.
The cutting disc must be used as intended. For example, do not sand with a
cutting disc. Cutting disc are designed for use under heavy pressure and the
lateral forces applied to them may cause them to fall apart. Always use
undamaged fixing flanges that are the correct size for the cutting disc. The
correct fixing flanges reduce the risk of damage to the grinding wheel. The fixing
flanges for cutting disc can be different from the fixing flanges for cutting disc.
3. TECHNICAL DESCRIPTION
1. Handle
2. Trigger
3. Air inlet
4. Exhaust
5. Adjustable air regulator
6. Guard
7. Cutting disc

4. UNPACKING AND CHECKING
Carefully remove the product from the packaging and examine it for any sign of
damage that may have happened during shipping. If any part is damaged or
missing; please contact the seller and do not attempt to use the air tool.
5. AIR SUPPLY
To prevent explosion: Use only clean, dry, regulated, compressed air
to power this tool. Do not use oxygen, carbon dioxide, combustible
gases, or any other bottled gas as a power source for this tool.

6. TOOL USE
Before each use of the tool, make sure that no parts of the air system are
damaged. If you notice damage, immediately replace the components with new,
undamaged ones. Dry condensed moisture inside the tool, compressor and hose
before each use of the air system.
Preparing the tool for operation
Screw a suitable nozzle to the air inlet thread firmly and securely to connect the
air supply hose.Install the additional handle to the housing using screws.Before
installing the blade, make sure that the permissible rotation speed of the blade is
equal to or higher than that of the grinder. Holding the spindle with one wrench,
remove the blade fixing screw firmly and securely using the other wrench.Mount
the blade with the dimensions specified in the technical data table on the
spindle.Place the ring under the screw and screw it in. Holding the spindle with
one wrench, tighten the blade fixing screw firmly and securely using the other
wrench.Manually rotate the blade (several revolutions) to ensure that the blade
rotates smoothly and without jams. The tool is ready to be connected to a
pneumatic system.
Starting and stopping the tool
Caution! Before starting the pneumatic tool, make sure that the mounted inserted
tool does not come into contact with any object or any body part. The tool is
operated by means of a lever which opens the air valve and thus ensures the
supply of compressed air to the tool drive. If the lever is equipped with a lock that
prevents the lever from being accidentally pressed. Turn the lock, so that it is
parallel to the lever, and then pull the lever towards the tool housing. This will
start the tool. Allow the tool to reach its rated speed and only then start working.
Working with the cutter
Do not use the cutting blade for side grinding. Allow the blade to run at full speed
before starting to cut. Apply only the rotating blade to the material. When cutting,
apply only the same pressure to the tool as is required for cutting the workpiece
Excessive pressure can damage the cutting blade, which increases the risk of
injury.Securely clamp the workpiece to prevent accidental movement during

machining. The clamping should also ensure that the gap created during the
cutting process maintains the same width or opens. When cutting large
workpieces, a clamp or support must be used on both sides of the cutting line.
The workpiece to be cut shall be supported near the cutting line and the edge.
This ensures that parts of the workpiece to be cut do not collapse in such a way
as to cause a jamming of the blade when cutting. During operation, sparks can
form and fragments of the workpiece can tear off . Make sure that sparks and
loose parts do not endanger the workplace.
7. MAINTENANCE
Never use petrol, solvent, or any other flammable liquid to clean the tool.
Vapours may ignite, causing the explosion of the tool and serious injury.The
solvents used to clean the tool holder and the body may soften the seals.
Thoroughly dry the tool before starting work.If you notice any malfunction of the
tool, immediately disconnect the tool from the pneumatic system. All components
of the pneumatic system shall be protected against contamination. Contaminants
entering the pneumatic system can damage the tool and other components of
the pneumatic system.
Maintenance of the tool before each use
Disconnect the tool from the air system.Before each use, introduce a small
amount of preservative (e.g. WD-40) through the air inlet. Connect the tool to the
air system and run it for approx. 30 seconds. This will allow you to spread the
preservative through the inside of the tool and clean it. Disconnect the tool from
the compressed air system again. Insert a small amount of SAE 10 oil into the
tool via the air inlet opening and the holes designed for that purpose. The use of
SAE 10 is recommended for the maintenance of pneumatic tools. Connect the
tool and run it briefly.
Caution! WD-40 cannot be used as a proper lubricating oil.Wipe off any excess
oil that may have escaped through the outlet openings. The oil left can damage
the tool seals.
Other maintenance activities
Before each use of the tool, make sure that there are no signs of damage to the
tool. Keep drivers, tool holders and spindles clean. Have the tool inspected by a

qualified workshop personnel every 6 months or after 100 operating hours. If the
tool has been used without the recommended air supply, increase the inspection
intervals of the tool.Removing defects Stop using the tool as soon as you detect
any defect. Use of a defective tool may result in injury. Any repairs or
replacements to the tool components must be carried out by qualified personnel
at an authorised repair shop.
8. TROUBLESHOOTING
Problems
Possible solution
The tool rotation is
too slow or does not
start up.
Apply a small amount of WD-40 through the air inlet
opening. Activate the tool for a few seconds. The blades
could stick to the rotor. Activate the tool for approx. 30
seconds. Lubricate the tool with a small amount of oil.
Caution! Excess oil can cause the tool to lose power. In
this case, clean the drive.
The tool starts up
and then slows
down
The compressor does not provide an adequate supply of
air. The tool is activated by the air accumulated in the
compressor tank. As the tank empties, the compressor
does not keep up with filling in the air shortages. Connect
the device to a more efficient compressor.
Insufficient power
Make sure that the hoses have an internal diameter at
least . Check the pressure setting to ensure that it is set to
the maximum value. Make sure that the tool is properly
cleaned and lubricated. If there are no results, have the
tool repaired.

9. DISPOSAL
At the end of the machine's working life, or when it can no longer be repaired,
ensure that it is disposed of according to national regulations.
Contact your local authority for details of collection schemes in your area.
In all circumstances:
Do not dispose of this tool with domestic waste.
Do not incinerate.
During decommissioning of the equipment, certain hazards should be
understood and avoided:
. Only with the line pressure released shall the equipment be
disassembled.
.Goggles should be worn.
10. SYMBOLS
In this manual and/or on the machine the following symbols are used:
Denotes risk of personal injury, loss of life or damage to
the tool in case of non-observance of the instructions in
this manual.
Wear hearing protection.
Wear safety goggles.
Contact with or inhalation of dust coming free during use
(e.g. lead-painted surfaces, wood and metal) can
endanger your health and the health of bystanders.
Always wear appropriate protective equipment, such as a
dust mask. Always use proper dust extraction during use.
Wear gloves.

11. EXPLODED VIEW

CANNON TOOLS LTD
Add: 20 station road, Rowley Regis, west midlands,B65 0JU.U.K.
Made in China