Universal Tool UT8820 Specifications

Manufacturer/Supplier Product Type RPM
Cycles Per Min
Model No/Nos Serial No
Product Nett Weight
lbs
Kg
Recommended Use Of
Balancer Or Support
Recommended Hose Bore
Size - Minimum
Recommended Max.
Hose Length
Ins M/M Ft M
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.
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 oil
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".
No
Page No 1
3/8 Capacity Pistol Grip
Drill
UT8820
2.2
1.0 3/8 10 30 10
2,600
Includes - Foreseen Use, Work Stations, Putting Into Service,
Operating, Dismantling, Assembly and Safety Rules
Operator Instructions Important
Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Noise Level Sound Pressure Level 91.9 dB(A)
Test Method Tested in accordance with Pneurop
test code PN8NTC1 and ISO Standard 3744
Sound Power Level 103.4 dB(A)
Vibration Level
Test Method Tested in accordance with ISO
standard 8662/1
Less than 2.5
Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY
Tel No Fax No(01494) 883300 (01494) 883237
Metres / Sec²
Air Pressure
Recommended Working 6.3 bar 90 PSI
Recommended Minimum n/a bar n/a PSI
Maximum 7 bar 100 PSI
Personal Safety Equipment
Use - Safety Glasses Yes
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors

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.
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.
Page No 2
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.
Dismantling & Assembly Instructions
Disconnect tool from air supply.
The drill chuck (25) may be removed by placing the chuck
adjusting key securely in the chuck and giving the key a sharp tap
with a hammer in the direction to loosen a right hand threaded
joint. Remove chuck spacer (27). If this fails to remove the chuck
remove it after the gearbox assembly has been removed from
the drill handle. (See later). Place motor housing (1) in a vice fitted
with soft jaws with the handle section pointing upwards, and
remove screw (4) and exhaust deflector (3) and locking adaptor
(24). Unscrew to remove gearbox and pull out motor assembly.
If the drill chuck has not been removed as it is too tightly fitted, it
can be removed as follows. Pull off ring gear (20) from gearbox
and pull off 3 off idler gears (21). Use a suitable square section
bar inserted between the pins in idler gear plate (22), pushed up
against the face to ensure that contact is made at the bottom of
the pins and unscrew the chuck using the chuck key. Do not use
a round bar or locate at the outer edge of the pins as this may
distort the 3 pins. A length of 8mm (0.312) square bar is ideal for
this purpose. Continue to dismantle the gearbox by supporting
ball bearings (23) on the gear side in a piece of tube of suitable
bore to just clear the largest diameter of idler gear plate (22) and
press out idler gear plate from bearings 2 off- (23). It is
recommended that the pins in the idler plate (22) are not
removed for replacement and the complete idler gear plate (22)
is replaced. For information the nominal diameter of the three
pins in the idler plate (22) is 0.1574 ins. Replacement is required
if the pins are badly damaged or worn below 0.155 diameter.
To dismantle motor assembly grip the front end plate (18) tightly
by hand and tap the gear end of the rotor with a non metallic or
soft metal (lead or aluminium) hammer through the front end
plate (18) and bearing (19). Remove 4 off rotor blades (16) and
cylinder (17). Support rear end plate (13) in a piece of tube with
a bore size as close as possible to the largest diameter of the
rotor (15) and tap the non splined end of the rotor to remove it
from the rear end plate and bearing. Tap out bearing (19) from
front end plate (18).
Tap out trigger retaining pin (2) and pull out trigger assembly.
Remove trigger (10) from valve stem (6). Remove valve stem (6)
from valve bushing (9) and remove O-ring (5). Remove 2 off
O-rings (7) and O-ring (8) from valve bushing (9).
Reassembly
Clean all component parts and examine for wear before
reassembling. Use only manufacturers or distributor supplied
spare parts. Check in particular for wear and cuts on O-rings and
wear on rotor blades. Lightly coat all parts with a suitable
pneumatic tool lubricating oil. Pack all bearings and gearbox with
a general purpose lithium or molybdenum based general
purpose grease.
Assemble in reverse order - see notes below.
Motor Assembly
If fitting a new rotor very lightly deburr the edges of the rotor
slots. Make sure rotor blade slots are clean. Make sure that the
faces of the front and rear end plates (18) and (13) that abut
cylinder (17) are free from burrs and surface marking. If
necessary lap faces on a flat, very fine grade of abrasive paper.
Press bearing (19) into end plate (18). Support bearing (12) at
rear end on the inner race and tap rotor on the gear end with a
soft metal or non metallic hammer until the rotor locates against
the face of the rear end plate. Support the inner face of the rear
end plate in a piece of tube with a bore diameter as close as
possible to the largest diameter of the rotor and tap the non
splined end until a clearance of .040 to .065mm is obtained
between the inner face of the rear end plate and the rotor. This
clearance to be checked when pulling the rotor by hand away
from the rear end plate and bearing assembly.
Spin rotor to ensure that it will spin freely in the rear end plate and
bearing assembly. Fit rotor blades and cylinder ensuring that the
pin in one end of the rotor cylinder locates in the round hole in the
rear end plate. Push on front end plate and check that rotor still
rotates freely.
Reassemble tool in reverse order.

UT8820 3/8 Capacity Pistol Grip Drill
Page No 3
Jun 2000 Ver 1.5
Ref No Part No Description
1732506 Motor Housing
2732060 Valve Pin
3732061 Exhaust Deflector
4732062 Deflector Screw
5732063 O-Ring
6732064 Valve Stem
7732065 O-Ring (2)
8732066 O-Ring
9732067 Valve Bushing
10 732068 Trigger
11 732069 Retaining Ring
12 729012 Bearing
13 732507 Rear End Plate
14 732072 Pin
Ref No Part No Description
15 732508 Rotor
16 732074 Rotor Blade (4)
17 732075 Cylinder
18 732076 Front End Plate
19 732077 Ball Bearing
20 732078 Ring Gear
21 732079 Idler Gear (3)
22 732080 Idler Gear Plate
23 732081 Ball Bearing (2)
24 732082 Front Locking Adapter
25 731250 Drill Chuck (3/8") inc Key
26 729343 Name Plate Screw (2)
27 730229 Chuck Spacer
28 117701 Grub Screw M6*6

Distributor
Page No 4
Accessories
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.
Declaration of Conformity
Universal Air Tool Company Limited
Unit 8, Lane End Industrial Park, High Wycombe, Bucks, HP14 3BY, England
declare under our sole responsibility that the product
Model UT8820 3/8” Capacity Pistol Drill, Serial Number
to which this declaration relates is in conformity with the following standard(s) or other normative document(s)
EN792 (Draft), EN292 Parts 1 & 2, ISO 8662 Part 1, Pneurop PN8NTC1
following the provisions of 89/392/EEC as amended by 91/368/EEC & 93/44/EEC
Place and date of issue Name and signature or equivalent marking of authorised person
Lane End D.H.Moppett (Man Director)
This document may not be copied wholly or in part by anyone without the consent of the Directors of Universal Air Tool Company Limited
© Copyright of Universal Air Tool Company Limited, established in the United Kingdom, 1994
Notes
Designed & Written in the U.K.