Universal Tool UT5721 Specifications

Read these instructions carefully before installing, operating,
servicing or repairing this tool. Keep these instructions in a safe
accessible place.
Important
Operator Instructions
Includes - Foreseen Use, Work Stations, Putting Into Service, Operating,
Dismantling, Assembly and Safety Rules
Manufacturer/Supplier Product Type RPM
Cycles Per Min
Universal Air Tool Company Limited
Unit 8
Lane End Industrial Park
High Wycombe
Bucks
HP14 3BY
Tel No Fax No(01494) 883300 (01494) 883237
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 The Tool
This die grinder is primarily designed for use with bonded abrasive
mounted point grinding wheels. It may also be used with steel rotary
files and carbide burrs provided their speed rating matches the speed
of the grinder.
This tool should not be fitted with cutting off wheels, saw blades, drill
bits, etc. If there is any doubt about the correct use of this product
contact your supplier for advice.
Also make sure that the shank size of the attachment to be driven
matches with the collet size fitted in the grinder and that the
maximum allowed running speed of the attachment exceeds that
marked on the grinder.
There are special rules governing the use of bonded abrasive
mounted point grinding wheels - for details see section "Operating".
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
lever/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 lever/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 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
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 of the extra safety precautions that
must be observed when using Grinding Ma-
chines.
Die Grinder
UT5721
20,000
3/8 10 30 10
No
1.7
0.8
Page No 1
Noise Level Sound Pressure Level 86.0 dB(A)
Test Method Tested in accordance with Pneurop
test code PN8NTC1
Vibration Level
Test Method Tested in accordance with ISO
standard 8662
Less than 2.5 Metres / Sec²
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
Yes
Use - Safety Boots
Use - Breathing Masks
Yes
Use - Ear Protectors
Yes

Operating
Select a suitable mounted point that has a free running speed higher
than the maximum running speed marked on the tool. Make sure
that the diameter of the shank exactly matches the diameter of the
collet mounted in the grinder. There are four standard sizes of collet
available for use with this grinder, i.e.
1) - 1/4" dia (0.250ins)(6.35mm)
2) - 6mm (0.236ins)
3) - 1/8" (0.125ins)(3.175mm)
4) - 3mm (0.118ins)
* available to order 2mm, 2.5mm, 3.5mm and 5mm diameter collets
Never try to force a 1/4" diameter shank into a 6mm collet or a 1/8"
diameter shank into a 3mm collet. Never try to close a 1/4" diameter
collet to secure a 6mm shank or a 1/8" diameter collet to secure a
3mm diameter shank. Always match correctly the shank size to the
collet size. If uncertain, have parts measured by a competent person.
Push the shank as far as possible into the collet and tighten the collet
nut using the spanners provided on the collet nut and output spindle.
The shank of the mounted point may be pulled forward from the
maximum insertion length but always ensure a minimum gripping
length of not less than 10mm - See Figure 2.
Be aware that the allowed running speed of the mounted point is
lowered because of an increase in the length of the shank between
the end of the collet and the body of the mounted point. This distance
is shown in Diagram 2 as "LO" and is called the overhang. The
information with respect to mounted point size, permissible running
speed and reduction in running speed due to an increase in overhang
is available from the supplier of the mounted point.
If the increase in overhang for access reasons takes the permissible
running speed of the mounted point below the free running speed
of the grinder select a smaller diameter mounted point.
The fitting of the mounted point should be done by a trained operator.
When first starting the grinder with a new wheel fitted, the grinder
should not be near other persons and be held in a protected area,
i.e. under a bench and run for a few seconds. This will protect
personnel from possible effects of damage to the mounted point
before it was fitted to the grinder i.e. wheel breakage.
Always use eye protection and wear protective gloves if there are
sharp edges in the work area. The tool and the grinding process can
create a noise level such that the use of ear protectors is advised.
If the grinding process creates a dust then use a suitable breathing
mask.
Check that the material being worked will not cause harmful dust or
fumes. If this is so then special breathing masks may be required.
If the grinder vibrates when first fitting a mounted point or during
operation, remove from service immediately and correct fault before
continuing to use.
Do not apply excessive pressure as this will reduce the cutting
efficiency and can bend the shank of the mounted point causing
vibration and the possibility of breakage. Apply light loads to allow the
wheel to cut.
Handle the grinder with care. If the grinder is dropped, carefully check
the mounted point for damage, i.e. cracks, chipping and start for the
first time as for fitting a new wheel i.e. under a bench.
Never exceed the maximum air pressure. If there is this possibility
always use this grinder with a pressure reducing valve fitted in the
supply line. Your supplier will advise of suitable equipment.
This grinder is fitted with a speed regulator and the speed may be
reduced by rotating air regulator(4) with a suitable screwdriver. When
making speed checks always rotate the air regulator to the position
to give the highest maximum speed.
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.
Safety Rules When Using A Die Grinder
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) Always select suitable abrasive to use with this tool - see Operating
Instructions.
3) Always shut off the air supply to the grinder and depress the lever
to exhaust air from the feed hose before fitting, adjusting or removing
the mounted point.
4) Always adopt a firm footing and/or position before using the
grinder.
5) Use only correct spare parts.
6) Check hose and fittings regularly for wear. Do not carry the tool
by its hose.
7) Do not remove and never tie down the safety lever.
8) Never exceed the maximum air pressure and check the free
running speed frequently. Have air regulator fully open when making
speed checks.
9) Use safety equipment as recommended.
10) Take care against entanglement of moving parts of the tool with
clothing, ties, hair, cleaning rags, etc.
11) Use only compressed air at the recommended pressure.
12) Do not attempt to fit any other attachment than those
recommended - see "Foreseen Use of Tool".
13) If the tool appears to malfunction, remove from use immediately,
and arrange for service and repair.
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
Figure 2. Gripping length of collet and chuck

UT5721 Die Grinder
Page No 3
Mar 2012 Ver 1.00
Ref No
Part No Description
1 5721-01 Hose Adaptor
2 5721-02 Muffler Disc
3 5721-03 Valve Spring
4 5721-04 Tip Valve
5 5721-05 Washer
6 5721-06 Lever Spring Pin
7 5721-07 Handle Assembly
8 5721-08 Valve Pin
9 5721-09 Lever Assembly
10 5721-10 Rear Bearing
11 5721-11 Rear End Plate
12 5721-12 Cage
13 5721-13 Rotor
14 5721-14 Rotor Blade (4)
15 5721-15 Front End Plate
16 5721-16 Front Bearing
17 5721-17 Lock Nut
18 5721-18 Collet Body
19 5721-19 Collet Insert
20 5721-20 Collet Nut

Distributor
Notes
Page No 4
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
Accessories
Designed & Written in the U.K.
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 UT5721 Die Grinder, 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 Parts 1, 2 & 14, Pneurop PN8NTC1
following the provisions of
Place of issue For and on behalf of the company
Lane End C. Moppett, Managing Director
Directive 2006/42/EC
ARTHUR PATERSON