Universal Air Tools UT8765 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

20mm Belt Sander

Unit 8
Lane End Industrial Park
High Wycombe
Bucks

Model No/Nos Serial No (if any)

UT8765

HP14 3BY

Tel No Fax No

[phone] (01494) 883237

RPM

15,000

Cycles Per Min

Product Nett Weight

3.3

1.5 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

Personal Safety Equipment

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 87.0 dB(A)
Sound Power Level 98.0 dB(A)

Test Method

Tested in accordance with Pneurop

est code PN8NTC1 and ISO Standard 3744

Vibration Level

Test Method

Less than 2.5

Tested 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.

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 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,
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 shown in figure 1. Do not connect
the tool to the air line system without

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 20 mm wide x 525 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 (47) 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
Lift cover (44), press down stopper (28) to reduce tension on
the abrasive belt and push on idle pulley (40) to remove belt.
Remove capscrew (38) and washer (37) to remove shoe (32).
Take out 2 off screws (38) and 2 off washers (37) to remove
fingerplate (39). Take out idle shaft screw (42) to release idle
pulley assembly. The idle pulley assembly may be dismantled by
tapping out the bea rings (41) from idle pulley (40) releasing
collar (43).
Drive out pin (45) to remove wheel cover lid (44). Take out 2 off
capscrews (33) to release cover latch (46). Pull out apron (27).
Belt al ig nm ent cou nter sunk scr ew m ay b e r emo ved fr o m
tension arm (35) if a replacement is required.
Drive out stop pin (36) and pull out tension arm (35) and spring
(34). Drive out roll pin (30) to release stopper (28) and stopper
spring (29).
Insert rod in hole of drive pulley (22) to prevent rotation and
unscrew nut (24) with washer (23). Take off drive pulley (22).
Note how drive pulley (22) locates on pin (19) in rotor (17).
Unscrew capscrew (31) to remove wheel cover (26). 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-rings (6) and (5), valve stem (4) with o-ring (3)
and spring (2).
Unscrew motor nut (12) from motor housing (1) with o-ring (13).
Tap c arefully, so a s not to dam age the th read, rotor (17) to
remove the motor assembly from motor housing (1). Pin (19)
can be taken out of rotor (17). Note how the pin (25) in cylinder
(16) locates the motor ass embly in the groove in the motor
housing (1) and that the pin (25) is at the rear end plate (15) end.
Hold motor assembly and again tap the threaded end of the
rotor (17) to drive it through the front end plate (15) and bearing
(14) assem bly. Bearing (14) may be tapped out of front e nd
plate (15). Take off cylinder (16) and 4 off rotor blades (18).

Support the rear end plate (15) in a piece of tube with a bore
diameter as close as possible to the maximum diameter of the
rotor and tap the non threaded end of the rotor (17) through the
rear end plate assembly. Tap out bearing (21) from front plate
(20).

Reassembly

Clean al l par t s and exam i ne f o r we ar , p art i cularl y o - r i ng s ,
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 (47).

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.

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