Universal Air Tools UT8740C14 User Manual

Operator Instructions

Air Pressure

Recommended Working

6.3

bar

90

PSI

Recommended Minimum

n/a

bar

n/a

PSI

Maximum

7.0

bar

100

PSI

Personal Safety Equipment

Use - Safety Glasses

Yes

Use - Safety Gloves

Yes

Use - Safety Boots
Use - Breathing Masks

Yes

Use - Ear Protectors

Yes

Includes - Foreseen Use, Work Stations, Putting Into Service, Operating,
Dismantling, Assembly and Safety Rules

Important

Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited

Angle Grinder

Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY

Tel No Fax No[phone] [phone]

Model No/Nos Serial No

UT8740A10 - 4” M10
UT8740A14 - 4” M14
UT8740B14 - 4 1/2” M14
UT8740C14 - 5” M14

RPM

10,000

Cycles Per Min

Product Nett Weight

4.4

2.0

lbs
Kg

Recommended Use Of

Balancer Or Support

No

Foreseen Use of Tool

This right angle grinder is designed to be used with reinforced resin
bonded depressed centre grinding wheels that have a permitted
rotational speed in excess of 10,000 RPM. See parts lists for details of
available wheel sizes.
The tool is designed to be used for light grinding and dressing of welds,
etc. but not for cutting off. The grinder must never be used if a wheel
guard (disc cover) is not fitted.

Work Stations

The tool should only be used as a hand held hand operated tool. It is
always recommended that the tool is used when standing on a solid
floor. It can be used in other positions but before any such use the
operator must be in a secure position having a firm grip and footing and
be aware of the safety rules to be obeyed when using the grinder.

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

3/8 10 30 10

Recommended Max.

Hose Length

Noise Level Sound Pressure Level 83.0 dB(A)

Test Method Tested in accordance with Pneurop

test code PN8NTC1

Vibration Level

1.2

Metres / Sec²

Test Method Tested in accordance with ISO

standard 8662

operate air shut off valve. The air supply should be lubricated. It is
strongly recommended that an air filter, regulator, lubricator (FRL) is
used as shown in Figure 1 as this will supply clean, lubricated air at
the correct pressure to the tool. Details of such equipment can be
obtained from your supplier. If such equipment is not used then the
tool should be lubricated by shutting off the air supply to the tool,
depressurising the line by pressing the trigger on the tool.
Disconnect the air line and pour into the intake bushing a
teaspoonful (5ml) of a suitable pneumatic motor lubricating oil
preferably incorporating a rust inhibitor. Reconnect tool to air supply
and run tool slowly for a few seconds to allow air to circulate the oil.
If tool is used frequently lubricate on daily basis and if tool starts to
slow or lose power.
It is recommended that the air pressure at the tool whilst the tool is
running is 90 p.s.i./6.3 bar. The tool can run at lower and higher
pressures with the maximum permitted working air pressure of
100 p.s.i./7 bar.

Putting Into Service

Air Supply

Use a clean lubricated air supply that will
give a measured air pressure at the tool of
90 p.s.i./6.3 bar when the tool is running
with the trigger/lever fully depressed. Use
recommended hose size and length. It is
recommended that the tool is connected to
the air supply as shown in figure 1. Do not
connect the tool to the air line system
without incorporating an easy to reach and

Page No 1

Operating

With the grinder correctly connected to the air supply, check the speed
of the grinder with an inlet pressure of 100 psi/7.0 bar measured at the
tool inlet. Check with a calibrated tachometer. Check that the guard is in
position and securely fixed. Check that the grinding wheel is of correct
dimensions, is not cracked or chipped and has a permitted speed
rating higher than the maximum permissible running speed of the
grinder which is 10,000 RPM. Check that the disc receiver is the
correct type as parts list and is screwed tightly to the shaft and locates
the bore of the grinding wheel on the spigot of the disc receiver and
screw on disc nut using the spanners provided. Do not over tighten as
this could crack the wheel. It should be tight enough to prevent wheel
spin off when the air supply is shut off.
When first starting the grinder with a new or changed wheel fitted, the
grinder should first be started in a protected area, i.e. such as under a
heavy bench well away from other persons and run for, say, one
minute. This will provide protection if the wheel should break because
some fault was not detected.
Always use eye protection and wear protective gloves if there are sharp
edges in the working area. The tool and the grinding process can create
a noise level such that ear protectors should be worn.
If the grinding process creates a dust then use a suitable breathing
mask.
Check that the material being worked will not cause harmful dust or
fumes. If this is so then special breathing apparatus may be required.
Seek advice before starting work.
If the grinder vibrates when first fitting the wheel or during use, remove
from service immediately and arrange for the fault to be corrected
before continuing to use.
Do not apply excessive pressure as this will reduce the cutting
efficiency. Apply light loads and allow the wheel to cut.
Handle the grinder with care. If the grinder is dropped, carefully
examine the wheel for damage and replace if necessary. Start the
machine as if for the first time of fitting a wheel, i.e. under a bench.
Make sure the object to be ground is in a firm fixed position.

Tool Maintenance

It shall be the tool owner’s and/or employer’s responsibility to assure
that tools are maintained in a safe operating condition. Tool
maintenance and repair shall be performed by authorised, trained,
competent personnel. Tools shall be disconnected from their
compressed air supply before repairs are attempted. Repairs shall be
consistent with the manufacturer’s recommended procedures. Tool,
hoses and fittings shall be replaced if unsuitable for safe operation. It
shall be the tool owner’s and/or employer’s responsibility to keep
required rating markings and warnings on the tool in legible condition.

Safety Rules For A Grinder

1) Read all the instructions before using this tool. All operators must be
fully trained in its use and aware of these safety rules.

2) Do not exceed the maximum working air pressure.

3) Use personal safety equipment.

4) Use only compressed air at the recommended conditions.

5) If the tool appears to malfunction remove from use immediately and
arrange for service and repair.

6) If the tool is used with a balancer or other support device ensure that
it is fixed securely.

7) Always keep hands away from the working attachment fitted to the
tool.

8) The tool is not electrically insulated. Never use the tool if there is any
chance of it coming into contact with live electricity.

9) Always when using the tool adopt a firm footing and/or position and
grip the tool firmly to be able to counteract any forces or reaction
forces that may be generated whilst using the tool.

10) Use only correct spare parts. Do not improvise or make temporary
repairs.

11) Do not lock, tape, wire, etc. the on/off valve in the run position. The
trigger/lever etc. must always be free to return to the ‘off’ position
when it is released.

12) Always shut off the air supply to the tool, and depress the
trigger/lever etc. to exhaust air from the feed hose before fitting,

adjusting or removing the working attachment.

13) Check hose and fittings regularly for wear. Replace if necessary. Do
not carry the tool by its hose and ensure the hand is remote from the
on/off control when carrying the tool with the air supply connected.

14) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc. This will cause the body to be
drawn towards the tool and can be very dangerous.

15) It is expected that users will adopt safe working practices and
observe all relevant legal requirements when installing, using or
maintaining the tool.

16) Do not install the tool unless an easily accessible and easily
operable on/off valve is incorporated in the air supply.

17) Take care that the tool exhaust air does not cause a problem or
blows on another person.

18) Never lay a tool down unless the working attachment has stopped
moving.

19) A grinding wheel should only be fitted by a competent person
trained to do so. The wheel must be of the correct size and speed
rating.

20) Check the speed of the grinder at least once per week, if it is in
regular use, with an accurate tachometer.

21) The tool must only be used with the grinding wheels as set out in
section “Foreseen Use of the Tool” and shown on parts list. Never fit
any other device.

22) Carry out the instructions as set out in “Putting into Service”.

23) Many countries have local or national rules re the use and fitting of
grinding wheels. Make sure such rules are observed.

24) Use a barrier to prevent sparks causing a hazard to the operator,
any other person or anything within the vicinity of the sparks.

25) If a wheel guard becomes damaged or has withstood a wheel
breakage, the guard must be changed.

26) Do not use chipped or cracked grinding wheels.

27) Always wear impact resistant eye protection.

28) Use only the disc plates, Items (4) and (5) provided with the grinder
for locating and clamping the wheel. Never use substitutes. Use the
paper blotter fixed to the wheel as this ensures even tightness when
the wheel is secured.

29) Tighten the wheel plates sufficiently to prevent wheel spin off when
the grinder is turned off. Do not tighten excessively as this may crack
the wheel.

30) The noise from the tool or the process noise of the grinding
operation may be such that hearing protection should be worn.

31) Avoid inhaling dust from the grinding process. Wearing of a
breathing mask is recommended. Grinder certain materials may mean
that special breathing precautions are necessary. Seek advice before
using the tool.

32) Always ensure that the workpiece is firmly supported so that it
cannot move during the grinding process.

33) If the grinder is dropped do not use unless the wheel is first
checked for damage by a competent person.

34) When not in use the grinder should be stored in a safe place where
it will not be damaged. If a tool has not been used for a period of time
check the tool as for the first time of using.

35) Be aware that if the grinding process causes high vibration, special
precautions should be taken.

36) The operator should be aware that the grinding wheel will continue
to rotate after the power supply has been shut off. This could cause a
hazard.

37) Always store grinding wheels in accordance with the
manufacturer’s instructions.

38) Check frequently that the spindle thread has not become
damaged or worn.

39) Always ensure that the grinding wheel has a higher permissible
running speed to the speed of the grinder.

Page No 2