Universal Air Tools UT8818 User Manual

Operator Instructions Important

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

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY

Tel No Fax No[phone] [phone]

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

1/2” Capacity Reversible
Pistol Grip Drill

Model No/Nos Serial No (if any)

UT8818

RPM

750

Cycles Per Min

Product Nett Weight Recommended Use Of

2.02

0.92

Recommended Working
Recommended Minimum
Maximum

Personal Safety Equipment
Use - Safety Glasses
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors

lbs
Kg

Air Pressure

Balancer Or Support

No

6.3
n/a

7.0

bar
bar
bar

90

n/a

100

Yes

Foreseen Use Of Tool

This drill is designed for the purpose of drilling holes in all types of
materials, i.e. metals, wood, stone, plastics etc. using drilling bits
designed for this purpose. It may be used with other forms of cutting
tools, polishing devices or for sanding using coated abrasive products.
Before using any such products first check with the manufacturer
their suitability for use with this type of drill. Do not use bonded
abrasive products (i.e. grinding wheels) or saw blades or any device
which has a permitted safe working speed less than the free speed
of the drill.
Do not use this drill for any other purpose than that specified without
consulting the manufacturer or the manufacturer's authorised supplier.

Work Stations

The tool should only be used as a handheld hand operated tool. It is
always recommended that the tool is used when standing on the
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 that the drill
can develop a
torque reaction
see section
"Operating".

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

3/8 10 30 10

Recommended Max.

Hose Length

Noise Level Sound Pressure Level 76.0 dB(A)

PSI

Test Method Tested in accordance with Pneurop

PSI

test code PN8NTC1 and ISO Standard 3744

PSI

Vibration Level

Less than 2.5 Metres / Sec²

Test Method Tested in accordance with ISO

standard 8662/1

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
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 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

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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./7.0 bar.

reassemble in the reverse order.
When assembling the gear sets (28,29, 30,31,32,33 & 34) use
lubricating oil on all the gear parts.
On completing assembly, ensure that all parts are locked tight and
the spindle rotates and the lever throttle. Connect tool to suitable air
supply and operate tool slowly for a few seconds and reset for
operation required. Refer to section on Operation Instructions.

Operating

Select suitable drill bit, insert the shank into the drill chuck as far as
possible and tighten chuck with key supplied making sure that the
shank of the device is securely clamped centrally between the three
chuck jaws. Remove chuck key.
When drilling holes of all sizes it is advised to use a pointed punch to
mark the centre at which the hole is to be drilled as this will provide
a starting point for the drill tip. This procedure will prevent the drill bit
from skidding, ensure that the hole is drilled where intended and help
to prevent drill breakage when using small drills. When drilling,
particularly with small diameter drills, always try to ensure that load
applied to the drill is such that the drill bit is always at right angles to
the hole being drilled. Do not force the drill but allow it to cut.
When drilling always adopt a firm posture to be able to counteract
any sudden movement of the drill due to torque reaction. Such torque
reaction can occur when the drill stalls due to a too heavy load being
applied or the material being too hard or tough. The torque reaction
can occur when the drill breaks through the material being drilled,
particularly on sheet metal. Always use eye protection and hand
protection is advised, particularly when drilling holes in metals where
the material being removed from the hole is in the form of long sharp
strips. Do not tie the drill chuck key to the drill as the attaching device
i.e. string or chain could become entangled with the rotating chuck
and bit etc.
If using an abrasive device, drilling stone or performing any operation
where dust is created, it is recommended to use a breathing mask.
Always ensure that the material to be drilled is firmly fixed to prevent
its movement.
It is also recommended that when drilling holes of large diameter to
first pre drill a hole of smaller diameter as this will reduce effort
required to drill the hole and minimise torque reaction.

Dismantling & Assembly Instructions

Disconnect the tool from the air supply,
To remove the chuck use a cross head screwdriver and remove the
set screw (39-1) then unscrew the chuck from the anvil (37).
Use a 17mm spanner to undo the air inlet (42) and second silencer
(44) then with a small hook pull out the o ring (11) and silencer (43).
Unscrew clutch housing (36) using a 25mm open spanner then
remove the internal gear (34) pull out gear set (30, 29 & 28).
Pull out the motor assembly, tap the rotor (22) to loosen the
assembly, remove front plate (24) and bearing (25) from the front
plate (24) remove rotor blades (23) cylinder (20) then remove the
end plate (19) and push out the bearing (18) from the end plate (19)
using a4.1mm diameter roll stick take out screw (16) and remove
switch (17) them remove the valve (15) o`ring (14) and spring (13).
Unscrew cap screw (10) and remove button (9) pull out valve pin (6)
from pistol housing (1) then pick out parts (8, 8-1, 5, 6, 4 & 7) in
sequence.

Reassembly

Clean all parts and examine for wear and cracks, etc. and replace as
necessary. Look in particular for wear and cuts on O-rings, wear on
rotor blades and wear on bearing (18) and (25). Make sure that the
faces of end plates (24) and (19) that about cylinder (20) are flat and
free from burrs. The height of the rotor (22) must be lower than the
height of the cylinder (20) otherwise the motor will not run.
Lap on a flat fine grade of abrasive paper if necessary. Use only
manufacturer or authorized distributor supplied spare parts. Lightly
coat all parts with suitable pneumatic tool lubrication oil and

Safety Rules When Using A Drill

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

2) Always select a suitable cutting, abrasive device suitable for use
with this drill.

3) Always shut off the air supply to the drill and depress the trigger
to exhaust air from the feed hose before fitting, adjusting or removing
the device. Remove drill chuck.

4) Always adopt a firm footing and/or position and be aware of
torque reaction developed by the drill.

5) Use only correct spare parts.

6) Check hose and fittings regularly for wear. Do not carry the tool
by its hose and ensure that the hand is remote from the on/off valve
(trigger) when carrying the tool with air supply connected.

7) Do not exceed maximum recommended air pressure. Avoid low
air pressures as this will allow the drill to stall more easily and develop
torque reaction.

8) Use safety equipment as recommended.

9) The tool is not electrically insulated. Do not use where there is a
possibility of coming into contact with live electricity, gas pipes, water
pipes, etc. Check the area of operation before performing the
operation.

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

11) Do not attempt to hold or guide the drill chuck when the tool is
running. Keep hands clear of the drilling process.

12) Use only compressed air at recommended conditions.

13) Do not attempt to fit attachments, i.e. for sawing, hedge cutting,
grinding, chain sawing, etc.

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

15) If an additional side handle is fitted to the tool ensure that it is
correctly positioned and fixed securely.

16) If the drill is used with a balancer or other suspension device
ensure that it is fixed securely.

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