Universal Air Tools UT8704 User Manual
Operator Instructions
T
Includes - Foreseen Use, Work Stations, Putting Into Service,
Operating, Dismantling, Assembly and Safety Rules
Important
Read these instructions carefully before insta lling, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Manufacturer/Supplier Product Type
Universal Air Tool Company Limited
30 mm Belt Sander
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
Model No/Nos Serial No (if any)
UT8704
HP14 3BY
Tel No Fax No
(01494) 883300 (01494) 883237
RPM
13,000
Cycles Per Min
Product Nett Weight
4.4
2.0 3/8 10 30 10
Recommended Working
Recommended Minimum
Maximum
Use - Safety Glasses
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
lbs
Kg
Air Pressure
Perso n a l Sa fe t y E q ui pm en t
Recommended Use Of
Balancer Or Support
No
6.3
bar
90
PSI
n/a
7.0
bar
bar
Yes
Yes
n/a
100
PSI
PSI
Recommended Hose Bore
Size - Minimum
Ins M/M Ft M
Noise Level
Sound Pressure Level 89.0 dB(A)
Sound Power Level 100.0 dB(A)
Test Method
Tested in accordance with Pneurop
test code PN8NTC1 and ISO Standard 3744
Vibration Level
Test Method
Less than 2.5
ested in accordance with ISO
standard 8662/1
Recommended Max.
Use - Ear Protectors
Foreseen Use of the Tool
The tool is designed for the purpose of cleaning or sanding of
materials using a continuous abrasive belt. Belts are available in
various grades to suit fine finishing or fast material removal.
Do not use the tool for any other purpose than that for which it
was designed. Do not modify this tool for any other use or for
its use as a belt sander without first consulting the manufacturer
or the manufacturer’s authorised distributor.
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 sander.
the tool to the air line system without incorporating an easy to
reach and 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 equ ipment can be obtaine d from your
supplier. If such equipment is not used then the tool should be
lubricated by shutting off the air supply to the tool,
depressu rising the line by pressing th e trigger on the tool.
Disconne c t th e a ir line an d pour into the in ta ke bu sh ing a
teaspoonful (5ml) of a suitable pneumatic motor lubricating oil
preferably incorporating a rust inhibitor. Reconnect tool to air
supply an d run tool slowly for a fe w seconds to allow a ir 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.
Hose Length
Metres / Sec²
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
sh own i n figu re 1. D o not conn ect
Page No 1
Operating
Select a suitable abrasive belt of the required grade to achieve
a fine sanded finish or high metal removal. The belt size for this
tool is 30 mm wide x 540 circumference (continuous belt) and
is available in various grades, the lowest is grade 40 grit which
is coarse for high material removal and grits are available as 40,
50, 60, 80, 100 and 120. The coarseness of the grit decreases
as the grade number increases, hence 40 is coarse and 120
very fine.
To fit a belt, press down the stopper and push the idle pulley
towards the tool until the stopper clicks into place which
releases the tension and holds the tension off the belt. Fit the
belt ensuring that it sits centrally on the drive pulley and the idle
pulley. Rele ase the stopper to tighten th e belt. Start the tool
slowly and use the adjusting screw (46) to align the belt
centrally.
Apply the sander lightly to the work and allow the belt to cut.
Take great care when sanding around sharp edges and corners
to avoid snagging and belt damage or breakage. It is always
recommended to use safety glasses and a breathing mask. The
sanding of certain materials may create a hazardous dust which
may require special breathing equipment. Check before using
the tool.
Even if the tool has a low noise level, the actual sanding process
may create a noise such that hearing protectors should be worn.
If there a re sharp edges on th e material being sa nded then
safety gloves are recommended.
Do not continue to use belts that are clogged or worn as this
will make the sanding process inefficient and the need to apply
unnecessarily high loads to the tool.
Only use belts of the dimensions specified. To use an incorrect
belt will either cause it to break or fly off. Both occurrences
could be dangerous.
Dismantling & Assembly Instructions
Disconnect tool from air supply.
Remove side handle (49) or side handle (49) and bracket (48) by
taking out 2 off screws (38). Lift cover (28), press down stopper
(33) to reduce tension on the abrasive belt and push on idle
pulley (42) to remove belt.
Remove cap screw (38) and washer (37) to take off shoe (36).
Take out 2 off screws (38) to remove finger plate (47). Take out
idle shaft screw (45) to release idle pulley assembly. The idle
pulley assembly may be dismantled by tapping out bearings (43)
from either side of idle pulley (42) releasing collar (44).
Drive out pin (29) to remove wheel cover (28). Take out 2 off
capscrews (31) to remove cover latch (30). Pull out apron (32).
Belt alignmen t c oun te rsu nk sc re w (46) may be rem ove d if
replacement required.
Drive out stop pin (40) and pull out tension arm (41) and spring
(39). Drive out roll pin (35) to release stopper(33) and stopper
spring (34).
Insert r od in hole in drive pulley (23) to preven t rotation and
unscrew nut (25) with washer (24). Take off drive pulley (23).
Note how drive pulley (23) locates on pin (20) in rotor (18).
Unscrew cap screw (26) to remove wheel cover (27). Unscrew
air inlet (11) from motor housing (1) and take off deflector (10).
Drive out pin (9) to remove lever (8). Unscrew valve body (7)
and take out O-ring (6), O-ring (5), valve stem(4) with O-ring (3)
and spring (2). Unscrew motor nut (12) from motor housing (1)
with O-ring (13). Tap carefully, so as not to damage the thread,
rotor (18) to remove the motor assembly from motor housing
(1). Pin (20) can be taken out of rotor (18). Note how pin (16) in
cylinder (17) locates the motor assembly in the groove in motor
housing (1) and that the pin (16) is at the rear end plate (15) end.
Hold motor assembly and again tap the threaded end of rotor
(18) to drive it through the front end plate (15) and bearing (22)
assembly. Bearing (22) may be tapped out of front end plate
(15). Take off cylinder (17) and 5 off rotor blades (19). Support
the rear end plate (15) in a piece of tube with a bore diameter
as close as possible to the maximum diameter of rotor (18) and
tap the non threaded end of rotor (18) through the rear end plate
asse mbly. Tap out bearin g (14) from rear end plate (15) a nd
take out O-ring (21) from motor assembly (1).
Reassembly
Clean all parts and examine for wear, particularly O-rings,
bearings and rotor blades. Use only distributor or manufacturer
supplied spare parts. Pack all bearings with a general purpose
grease and reassemble in the reverse order. Refit belt and adjust
alignment using screw (46).
Safety Rules For A Sander
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) I f the too l appea rs to mal functio n remove f rom 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 u sing the tool a dopt 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, w ire, etc. the on/off va lve 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 observ e all r ele va nt lega l requ irem ents wh e n in st alling,
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.
Page No 2
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