Universal Air Tools UT8175S User Manual

Operator Instructions

Air Pressure

Recommended Working

6.3

bar

90

PSI

Recommended Minimum

n/a

bar

n/a

PSI

Maximum

7.0

bar

100

PSI

Personal Safety Equipment

Use - Safety Glasses

Yes

Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks
Use - Ear Protectors

Yes

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

Important

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

Manufacturer/Supplier Product Type

Universal Air Tool Company Limited

1/2” Impact Wrench

Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY

Model No/Nos Serial No

UT8175R - Regulator
UT8175S - No Regulator

Tel No Fax No[phone] [phone]

RPM

8,000

Cycles Per Min

Product Nett Weight

4.0

1.9

lbs
Kg

Recommended Use Of

Balancer Or Support

No

Foreseen Use Of Tool

The impact wrench is designed for the tightening and loosening of
threaded fasteners within the range as specified by the manufacturer. It
should only be used in conjunction with suitable impact type 1/2"
square female drive nut running sockets. Only use sockets which are of
the impact type.
It is allowed to use suitable extension bars, universal joints and socket
adaptors between the square output drive of the impact wrench and
the square female drive of the socket.
Do not use the tool for any other purpose than that specified without
consulting the manufacturer or the manufacturer's authorised supplier.
To do so may be dangerous.
Never use an impact wrench as a hammer to dislodge or straighten
cross threaded fasteners. Never attempt to modify the tool for other
uses and never modify the tool for even its recommended use as a
nutrunner.

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 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 when
loosening fasteners the tool can move quite
quickly away from the fastener being undone.
An allowance must always be made for this
rearward movement so as to avoid the possi­bility of hand/arm/body entrapment.

Recommended Hose Bore

Size - Minimum

Ins M/M Ft M

3/8 10 30 10

Recommended Max.

Hose Length

Noise Level Sound Pressure Level 83.0 dB(A)

Test Method Tested in accordance with

BS EN ISO 15744:2008

Vibration Level

6.8

Metres / Sec²

Test Method Tested in accordance with

BS EN ISO 28927-2:2009

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 and the air regulator in its maximum opening flow
position. 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 a quick connect coupling directly to the tool but use a whip or
leader hose of approximately 12 inches length. 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 preferably incorporating a rust inhibitor. Reconnect

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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. When lubricating, also ensure that
screen is clean.
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. For a lower air pressure the tool will give a lower output for
a given setting of the air regulator set for 90 psi operation and an
increased output for higher pressures. Hence it is possible that changes
in supply pressure can give situations where the fastener is under or
over tightened. For changes in pressure, the regulator position and
application should be reassessed.
It is recommended that joint tightness of the threaded fastener
assembly be checked with suitable measuring equipment.

Operating

The output of the impact wrench in prime working condition is
governed by mainly three factors
a) the input air pressure
b) the time the impact wrench is operated on the joint. Normal time for
joints of average tension requirement 3 to 5 seconds
c) the setting of the air regulator for a given joint at a given pressure
operated for a given time.
It is strongly recommended that an external pressure regulator ideally as
part of a filter/regulator/lubricator (FRL) is used to control air inlet
pressure so that the pressure can be set to help control the tension
required to be applied to the threaded fastener joint.
There is no consistent reliable torque adjustment on an impact wrench
of this type. However, the air regulator can be used to adjust torque to
the approximate tightness of a known threaded joint. To set the tool to
the desired torque, select a nut or screw of known tightness of the
same size, thread pitch and thread condition as those on the job. Turn
air regulator to low position, apply wrench to nut and gradually increase
power (turn regulator to admit more air) until nut moves slightly in the
direction it was originally set. The tool is now set to duplicate that
tightness, note regulator setting for future use. When tightening nuts not
requiring critical torque values, run nut up flush and then tighten an
additional one-quarter to one-half turn (slight additional turning is
necessary if gaskets are being clamped). For additional power needed
on disassembly work, turn regulator to its fully open position. This
impact wrench is rated a 1" bolt size. Rating must be down graded for
spring U bolts, tie bolts, long cap screws, double depth nuts, badly
rusted conditions and spring fasteners as they absorb much of the
impact power. When possible, clamp or wedge the bolt to prevent
springback.
Soak rusted nuts in penetrating oil and break rust seal before removing
with impact wrench. If nut does not start to move in three to five
seconds use a larger size impact wrench. Do not use impact wrench
beyond rated capacity as this will drastically reduce tool life.
Note: Actual torque on a fastener is directly related to joint hardness,
tool speed, condition of socket and the time the tool is allowed to
impact.
Use the simplest possible tool-to-socket hook up. Every connection
absorbs energy and reduces power.

Safety Rules When Using an Impact
Wrench

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) The socket used must be of the correct drive size and the "impact"
type. Never use sockets other than impact type.

3) Do not use sockets with excessive wear to the input and output
drives. Check that the square on any other type of drive or the impact
wrench is not cracked or excessively worn before fitting or changing
socket, extension, etc. Make sure that the socket is firmly fixed to the
tool.

4) Always ensure that a stable position or footing is adopted before
using the tool.

5) Ensure that the tool has been correctly set up on a test joint. Incorrect
set up could cause joint breakage with sudden and unexpected
movement of the tool.

6) Use only correct spare parts for repair.

7) Always ensure that the reverse valve is in the correct position before
operating the tool. Do not run the tool unless the socket is first located
on the joint.

8) Check hose and fittings regularly for wear. Use quick connect
couplings only as recommended. See "Putting into Service". Do not
carry the tool by the hose and ensure that the hand is away from the
on/off valve when carrying.

9) Do not attempt to hold or guide the socket by hand when the tool is
running.

10) Do not exceed maximum recommended air pressure.

11) Use safety equipment as recommended.

12) The tool is not electrically insulated. Do not use where there is a
possibility of coming into contact with live electricity.

13) Preferably shut off the air supply before changing sockets or at least
ensure that the hands are well clear of the operating trigger.

14) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc.

15) When loosening fasteners first ensure that there is sufficient
clearance behind the tool to avoid hand entrapment. The tool will move
away from the threaded joint as the nut/bolt etc. is loosened and rides
up the thread moving the tool with it.

16) Only use extensions, adaptors and universal joints suitable for use
with impact wrenches.

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

Tool Maintenance

It shall be the tool owner’s and/or employer’s responsibility to assure
that tools are maintained in a safe operating condition. Tool
maintenance and repair shall be performed by authorised, trained,
competent personnel. Tools shall be disconnected from their
compressed air supply before repairs are attempted. Repairs shall be
consistent with the manufacturer’s recommended procedures. Tool,
hoses and fittings shall be replaced if unsuitable for safe operation. It
shall be the tool owner’s and/or employer’s responsibility to keep
required rating markings and warnings on the tool in legible condition.

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