Universal Air Tools UT1075K User Manual

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Operator Instructions Important

t

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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] (01494) 883237

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

ngle Pencil Die Grinder

Model No/Nos Serial No

UT1075K

RPM

70,000

Cycles Per Min

Product Nett Weight

0.40

0.18 1/4 6 20 6

Recommended Working
Recommended Minimum
Maximum

Use - Safety Glasses
Use - Safety Gloves
Use - Safety Boots
Use - Breathing Masks

lbs
Kg

Air Pressure

Perso n a l Sa fe t y E q ui pm en t

Recommended Use Of

Balancer Or Support

No

6.3

bar

90

PSI

n/a

7.0

bar
bar

Yes

n/a

100

PSI
PSI

Recommended Hose Bore

Recommended Max.

Size - Minimum

Ins M/M Ft M

Noise Level

Test Method

Sound Pressure Level 72.0 dB(A)

Tested in accordance with Pneurop

est code PN8NTC1 and ISO Standard 3744

Vibration Level

Test Method

Less than 2.5

ested in accordance with ISO

standards 8662/1 & 8662/17

Use - Ear Protectors

Foreseen Use Of The Tool

This pencil die grinder is primarily designed for use with bonded
abrasive mounted point grinding wheels. It may also be used
with ste el rotary files and carbide bu rrs 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 th at the shank s ize of the a ttachment to be
driven matches with the collet size fitted in the grinder and that
the maximum allowed running spee d 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

Hose Length

Metres / Sec²

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 mu st be in a s ecure
position having a firm grip and
footing and be aw ar e of th e
extra sa fety pr ecauti ons that
must be observed when using
Grinding Machines.

Page No 1

pour into the in ta ke bu sh ing a 1/5 tea spoonfu l (1ml) 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 bar.

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 three
standard sizes of collet available for use with this grinder, i.e.
(1) - 1/8" (0.125ins)(3.175mm)
(2) - 1mm (0.039ins)
(3) - 3mm (0.118ins)
Never try to force a 1/8" diameter shank into a 3mm collet.
Never try to close a 1/8" diameter collet to secure a 3mm
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 mo unted
point may be pulled forw ard
from the maximum insertion
length but always ensure a
minimum gripping length of
not less th an 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
betwee n 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 th e grinder w ith a ne w whee l fitted, the
grinder should not be near othe r 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, re move from service immediately and corre ct fault

Figure 2. Gripping length of collet and chuck

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 an d 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 a s for fitting a ne w wheel i.e. u nder 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 a dvise of suitable
equipment.

Dismantling & Assembly Instructions

Disconnect tool from air supply.
First, using the appropriate sized Allen wrench, loosen the hex
screw (19) one complete turn and slide off the rear end holder
(20). Then, using the 9mm wrench, unscrew and remove the
extended air supply hose (21) along with the exhaust overhose
(22). Slide off the sliding knob assembly, complete with O-Rings
(16), (18), air regulator and sliding knob (17). O-Rings (16, 18)
may then be removed from inside air regulator and by pushing

down on air regulator, it may be removed from
sliding knob (17). Unscrew air inlet assembly,
consistin g of hose plug (14), pin (15) and air

D = diameter of mounted point
T = length of mounted point
Lo = overhang
S = di ameter of shank
Lg = gripping length

intake steel tube (13) from body (12). Pin
(15) and air inta ke tube (13) may the n be

removed from hose plug (14).
Using collet wrenches supplied, unscrew collet (2) from rotor
(6). Using a special tool (spanner wrench)with 2 pins, unscrew
lock nut (1) then the complete motor assembly can be pulled off
from angle housing (11). Remove spacer (3) from rotor (6). To
disassemble motor assembly, with a suitable punch, tap the rear
portion of rotor (6) slightly then separate rear end plate (10), ball
bearing (9), cylinder (8), rotor blades (7), front end plate (5) and
ball bearing (4). Slide off the comfort grip (25) from body (12) by
hands. Grip body (12) slightly in a vise fitted with soft jaws. To
separate angle housing (11) and body (12), provide local heating
to the connection thread portion to soften and break the grip of
the thread locking sealant. Then, unscrew the angle housing
(11) from body (12).

Reassembly

Clean a ll parts and examin e for wear, replacing a ny worn or
damaged parts. Use only replacement parts obtained from the
manufacturer or an authorized distributor. Lightly coat all parts
with a suitable pneumatic tool lubricating oil and assemble tool
in reverse order.

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.

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