T
Operator Instructions Important
T
V
T
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
el No Fax No(01494) 883300 (01494) 883237
Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Straight Lever Type Drill
Model No/Nos Serial No (if any)
UT8741A
RPM
4,500
Cycles Per Min
Product Nett Weight
2.20
1.0 3/8 10 30 10
Recommended Working
Recommended Minimum
Maximum
Use - Safety Glasses
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors
lbs
Kg
Air Pressure
Personal Safety Equipment
Recommended Use Of
Balancer Or Support
No
6.3
bar
90
n/a
bar
n/a
7.0
bar
10.0
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
Noise Level Sound Pressure Level 91.9 dB(A)
PSI
PSI
PSI
est Method Tested in accordance with Pneurop
test code PN8NTC1 and ISO Standard 3744
ibration Level
Sound Power Level 104.5 dB(A)
Less than 2.5
est 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
Recommended Max.
Hose Length
Metres / Sec²
Page No 1
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./7.0 bar.
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 h o l e i s t o b e 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 Instruction
Disconnect tool from air supply.
Insert the drill chuck key securely into the chuck (37) and strike
the chuck key a sharp blow with a hammer in a direction to
loosen a right hand treaded joint to remove the chuck and chuck
spacer (36). Grip motor housing (7) with housing cover (6) in a
vise fitted with soft jaws and unscrew inlet bushing (2) together
with screen (1). With a needle pointed tool prise out retaining
ring (3), pull out deflector (4) and remove o-ring (5) from it. Drive
out roll pin (8) and remove throttle lever assembly (9). Unscrew
valve screw (16) with o-rings (14,15) and from the lever side
push out air regulator (13), spring (12), o-ring (11), and valve
stem (10). Unscrew clamp nut (35) from reducer (29) complete
with the internal gear drive assembly. From the front end push
out the internal gear assembly complete with internal gear (30).
Pull off bearings (34), spindle with pins (33), needle bearing (32)
and idler gear (31). Unscrew reducer (29) from motor housing
(7). Pull out the motor assembly from the motor housing (7).
Take off pinion gear (28) and spacer (27) from rotor (22). Grip
front plate (24) by hand and tap the spindle end of rotor (22)
with a non metallic (lead or aluminum) hammer so as to drive
the rotor through the front end plate and bearing assembly. Pull
off bearing (26) from the front plate (24). Do not remove pins
(23, 25, and 19) from the end plates (24, 18) unless
replacements are required. Take off cylinder (20) noting its
orientation with the rear plate (18) for reassembly and take out
4 off rotor blades from rotor (22). Support the rear plate (18) in
a piece of tube with a bore diameter as close as possible to the
maximum diameter of the rotor (22) and tap the non-splined end
of the rotor to drive it through the rear plate and bearing
assembly. With a suitable punch tap out bearing (17) from rear
plate (18). Remove the housing cover (6) from motor housing (7)
when needed.
Reassembly
Clean all component parts and examine to wear before
reassembling. Use only manufacturer 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 suitable
pneumatic tool lubricating oil preferably one incorporating a rust
inhibitor. Pack all bearings and gearbox with a lithium or
molybdenum based general purpose reassemble in the reverse
order (see note below). For the motor assembly ensure that
front and rear plates that abut the cylinder are clean and free
from burrs and surface marking. If necessary, lap faces that abut
the cylinder on a flat fine grade of abrasive paper. Press bearings
into front and rear plates, support the bearing in the rear plate
on its inner ring and tap the rotor its splined end with a soft
metallic hammer into the bearing until rotor locates against the
rear plate. Support the inner face of the end plate as close as
possible to the largest diameter of the rotor and tap the nonsplined end of the rotor until a clearance of 0.0015” (0.04mm)
to 0.0025” (0.065mm) is obtained between the inner face of
the rear plate and rotor. This clearance has to be checked when
pulling the rotor away from the rear plate and bearing assembly.
Spin rotor to ensure that it will rotate freely in the rear plate
bearing. Locate the cylinder by the locating pin to the rear plate
checking that the ports in the end plate match with those in the
cylinder. Insert the four motor blades into the rotor and locate
correctly the front plate to the cylinder using the locating pin.
Ensure that the rotor will spin freely in the assembly. This is the
best checked by placing the motor assembly in a vee block and
squeezing the front and rear plates against the cylinder. When
refitting motor assembly to motor housing (7) ensure that pin
(25) in the side of front plate (24) locates in the slot in the front
of the main bore of motor housing (7).
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.
Page No 2
UT8741A Straight Lever Type Drill
Ref No Part No Description
1 1005726 Screen
2 730120 Inlet Bushing
3 729703 Retaining Ring
4 729702 Deflector
5 732247 O Ring
6 901214 Housing Cover
7 901115 Motor Housing
8 729167 Roll Pin
9 900382 Throttle Lever
10 729259 Valve Stem
11 1012370 O-Ring
12 729258 Valve Spring
13 729282 Air Regulator
14 729088 O-Ring
15 729073 O-Ring
16 729262 Valve Screw
17 1010183 Ball Bearing
18 729706 Rear Plate
19 731267 Roll Pin
Ref No Part No Description
20 729708 Cylinder
21 729709 Rotor Blade (4)
22 901215 Rotor
23 901144 Roll Pin
24 901216 Front Plate
25 900720 Roll Pin
26 729020 Ball Bearing
27 901217 Spacer
28 901218 Pinion Gear
29 901219 Reducer
30 901220 Internal Gear
31 901221 Idler Gear (3)
32 901222 Needle Bearing (3)
33 901223 Spindle inc 3 Pins
34 900030 Ball Bearing (2)
35 901224 Clamp Nut
36 730229 Chuck Spacer
37 H0019 3/8" Drill Chuck
Sep 2003 Ver 1.0
Page No 3
A
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 UT8741A Straight Lever Type Drill, Serial No
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
Lane End D.H.Moppett (Man Director)
Place and date of issue Name and sign ature or equivalent marking of authorised person
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.
ccessories
Notes
Distributor
This document may not be copied wholly or in part by anyone without the consent of the Directors of Universal Air Tool Company Limited
Designed & Written in the U.K.
©Copyright of Universal Air Tool Company Limited, established in the United Kingdom, 1994
Page No 4
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