MIRKA AOS 32mm User manual

Mirka® AOS
32 mm (1 ¼")

1
Parts Page
C
B
A
D
E
F
54

2
Parts List
Item P/N Description Qty.
1 AOS001 THROTTLE HANDLE 1
2 AOS002 THROTTLE VALVE 1
3 AOS003 VALVE STEM 1
A AOS107 O-RING AND VALVE SPRING KIT
4 AOS004 O-RING 1
5 AOS005 VALVE SPRING 1
6 AOS006 AIR REGULATOR 1
A AOS107 O-RING AND VALVE SPRING KIT
7 AOS007 O-RING 2
B AOS109 MUFFLER AND O-RING KIT
8 AOS008 O-RING 1
9 AOS009 MUFFLER FELT 2
10 AOS010 MUFFLER PLATE 1
11 AOS011 AIR INLET BUSHING 1
12 AOS012 ROTOR 1
13 AOS013 SPACER 1
14 AOS014 FRONT END PLATE 1
15 AOS015 SPRING PIN 3
C AOS121 BEARING AND VANES KIT
17 AOS017 BALL BEARING 1
8 AOS008 O-RING 1
18 AOS018 BEVEL PINION 1
20 AOS020 CYLINDER 1
C AOS121 BEARING AND VANES KIT
21 AOS021 VANES 4
22 AOS022 REAR END PLATE 1
C AOS121 BEARING AND VANES KIT
23 AOS023 BALL BEARING 1
24 AOS024 ARBOR CASING 1
25 AOS025 OILER 1
26 AOS026 ARBOR 1
27 AOS027 BALL BEARING 1
28 AOS028 BEVEL GEAR 1
30 AOS030 BALL BEARING 1
31 AOS031 WAVE WASHER 1
32 AOS032 DUST SEAL 1
33 AOS033 ARBOR BEARING CAP 1
34 AOS034 LOCK NUT 1
35 AOS035 COUNTER WEIGHT 1
36 AOS036 SET SCREW 1
D AOS137 SPINDLE BEARING ASSEMBLY
37 AOS037 BALANCE SHAFT 1
38 AOS038 BALL BEARING 2
39 AOS039 SANP RING 2
40 AOS040 HEX.SOCKET BUTTON HEAD SCREW 1
E AOS141 BOOT AND BOOT CLAMP KIT
41 AOS041 BOOT 1
42 AOS042 BOOT CLAMP 1
43 AOS043 GRIP(Mirka) 1
44 AOS044 THROTTLE LEVER 1
45 AOS045 SPRING PIN 1
46 AOS046 QUICK LOCK PLATE ASSEMBLY 1
F AOS147 SCREW KIT
47 AOS047 HEX.SOCKET BUTTON HEAD SCREW 4
48 QUICK LOCK BACKING PAD 32mm (1 1/4”) PSA, SOFT 1
QUICK LOCK BACKING PAD 32mm (1 1/4”) GRIP, SOFT 1
49 AOS049 1/4” FEMALE PLATE 1
F AOS147 SCREW KIT
50 AOS050 HEX SOCKET FLAT CONUNTERSUNK SCREW 4
51 32mm BACKING PAD PSA, SOFT 1
52 AOS052 L SHAPE HEX. WRENCH(2.5mm) 1
53 AOS053 L SHAPE HEX. WRENCH(2.0mm) 1
54 AOS054 SPACER (Ø17mm x Ø21.8mm x 0.05mm) OPT
55 AOS055 SPACER (Ø26mm x Ø29.5mm x 0.05mm) OPT

3
Spare Parts Kits
AAOS107 O-Ring & Valve Spring Kit
Code: 8992331071 B AOS109 Mufer & O-Ring Kit Code: 8992331091 CAOS121 Bearing & Vanes Kit Code: 8992331211
EAOS141 Boot & Clamp Kit
Code: 8992331411 FAOS147 Screw Kit Code: 8992331471
DAOS137 Spindle Bearing Kit
Code: 8992331371

28
Manufacturer/Supplier
Mirka Ltd.
FI-66850 Jeppo
Finland
Tel: + 358 20 760 2111
Fax: [phone]
Required Personal Safety Equipment
Safety Glasses Breathing Masks
Safety Gloves Ear Protection
Recommended Airline
Size - Minimum
10 mm 3/8 in
Recommended Maximum
Hose Length
8 meters 25 feet
Air Pressure
Maximum Working Pressure 6.2 bar 90 psig
Recommended Minimum NA NA
Mirka 8,500 rpm
AOS 32 mm (1 1/4 in.)
Operator Instructions
Includes – Please Read and Comply, Proper Use of Tool,
Work Stations, Putting the Tool Into Service, Operating In-
structions, Product Conguration/Specications Tables, Parts
Page, Parts List, Trouble shooting guide.
Important
Read these instructions care-
fully before installing, operating,
servicing or repairing this tool.
Keep these instructions in a safe
accessible location.
Declaration of conformity
Mirka Ltd.
FI-66850 Jeppo, Finland
declare on our sole responsibility that the product
32 mm (11/4 in.( 8,500 rpm Angle Orbital Sander )see ”Product Conguration/Specications“ table for particular model(
to which this declaration relates is in conformity with the following standard)s( or other normative document)s( EN ISO 15744:2008. Following the
provisions of 89/392/EEC as amended by 91/368/EEC & 93/44/EEC 93/68/EEC Directives and consolidating Directive 2006/42/EC
Place and date of issue Company Stefan Sjöberg, CEO
Jeppo 28.03.2016
Original Instructions

29
Closed Loop Pipe System
Sloped in the direction of air flow
Drain Leg
Ball Valve
To Tool Station
Filter
Drain Valve
Regulator
Lubricator
Ball
Valve
Ball Valve Air Flow
Air Dryer
Air Compressor
and Tank
Air Hose
To Coupler
at or near Tool
Please Read and Comply with Putting the Tool into Service
Operating Instructions
Work Stations
Proper Use of Tool
Figure 1
1( General Industry Safety & Health Regulations, Part 1910,
OSHA 2206, available from: Superintendent of Documents;
Government Printing Ofce; Washington DC 20402
2( Safety Code for Portable Air Tools, ANSI B186.1 available from:
American National Standards Institute, Inc.; 1430 Broadway;
New York, New York 10018
3) State and Local Regulations.
This tool is designed for sanding all types of materials i.e. metals,
wood, stone, plastics, etc. using abrasive designed for this pur-
pose. Do not use this tool for any other purpose than that speci-
ed without consulting the manufacturer or the manufacturer’s
authorized supplier. Do not use backung pads that have a working
speed less than 8,500 rpm free speed.
The tool is intended to be operated as a hand-held tool. It is
always recommended that the tool be used when standing on a
solid oor. It can be used in any position but before any such use,
the operator must be in a secure position and have a rm grip and
footing, and be aware that the tool can develop a torque reaction.
See the section ”Operating Instructions“.
Use a clean lubricated air supply that will give a measured air
pressure at the tool of 6.2 bar )90 psig( bar when the tool is run-
ning with the lever fully depressed. It is recommended to use an
approved 10 mm )3/8 in.( x 8 m )25 ft( maximum length airline. It
is recommended that the tool be connected to the air supply as
shown in Figure 1.
Do not connect the tool to the airline 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 lter,
regulator and lubricator )FRL( be 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
manually lubricated
To manually lubricate the tool, disconnect the airline and put 2 to
3 drops of suitable pneumatic motor lubricating oil such as Fuji
Kosan FK-20, Mobil ALMO 525 or Shell TORCULA® 32 into the
hose end )inlet( of the machine. Reconnect the tool to the air
supply and run the tool slowly for a few seconds to allow air to
circulate the oil. If the tool is used frequently, lubricate it on a daily
basis or lubricate it if the tool starts to slow or lose power.
It is recommended that the air pressure at the tool is 6.2 bar )90
psig( while the tool is running. The tool can run at lower pressures
but never higher than 6.2 bar )90 psig(.
1( Read all 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( Make sure the tool is disconnected from the air supply. Select a suitable abrasive and
secure it to the backung pad. Take care to center the
abrasive on the backung pad.
3( Always wear required safety equipment when using this
tool.
4( When sanding always place the tool on the work then
start the tool. Always remove the tool from the work
before stopping. This will prevent gouging of the work
due to excess speed of the abrasive.
5( Always disconnect the air supply from the tool before t-
ting, adjusting or removing the abrasive or backung pad.
6( Always adopt a rm footing and/or position and be aware
of the torque reaction developed by the tool.
7) Use only correct spare parts.
8( Always ensure that the material to be sanded is rmly
xed to prevent its movement.
9( Check the hose and ttings regularly for wear. Do not
carry the tool by its hose; always be careful to prevent
the tool from being started when carrying the tool with
the air supply connected.
10( Do not exceed the maximum recommended air pressure.
Use safety equipment as recommended.
11( 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 working
area before operation.
12( Take care to avoid entanglement of the moving parts of
the tool with clothing, ties, hair, cleaning rags, etc. If entangled, it will cause the body to be
pulled towards the work and moving parts of the machine, which can be very dangerous.
13( Keep hands clear of the spinning pad during use.
14( If the tool appears to malfunction, remove from use immediately and arrange for service and
repair.
15( Do not allow the tool to free speed without taking precautions to protect any persons or
objects from the loss of the abrasive or pad.

30
Specications subject to change without prior notice.
*The values stated in the table are from laboratory testing in conformity with stated codes and standards and are not sufcient for risk
evaluation. Values measured in a particular work place may be higher than the declared values. The actual exposure values and amount
of risk or harm experienced to an individual is unique to each situation and depends upon the surrounding environment, the way in which
the individual works, the particular material being worked, work station design as well as upon the exposure time and the physical condi-
tion of the user. Mirka, Ltd. cannot be held responsible for the consequences of using declared values instead of actual exposure values
for any individual risk assessment.
Further occupational health and safety information can be obtained from the following websites:
https://osha.europa.eu/en (Europe)
http://www.osha.gov )USA(
Greasing Instructions:
Hold the tool in a horizontal position to keep the grease in the correct position.
Lubricate with gear grease )molybdenum disulde( using a suitable grease gun
through the )25( Oiler with 2 to 3 plunges for 24 hours of use.
Product Conguration/Specications: 8,500 rpm AOS 32mm )1 1/4in.(
Orbit Pad Size
mm (in.)
Model
Number
Product Net
Weight
kg (pounds)
Height
mm )inch(
Length
mm )inch(
Power
watts (HP)
Air Consump-
tion LPM (scfm)
*Noise
Level
dBA
*Vibration
Level
m/s2
*Uncertainty
K
m/s2
3 mm (1/8 in.) 32
(1 1/4) AOS130NV 0.60 (1.32) 104.5 (4.11)
156.9
(6.18) 357 (0.48) 509 (18) 75.5 2.22 0.72
The noise test is carried out in accordance with EN ISO 15744:2008 – Hand-held non-electric power tools – Noise measurement code
– Engineering method )grade 2( and EN ISO 11203:2009 Acoustics – Noise emitted by machinery and equipment – Determination of
emission sound pressure levels at a work station and other specied positions from the sound power level.
The vibration test is carried out in accordance with EN ISO 28927-3, Hand-held portable power tools – Test method for evaluation of vibra-
tion emission – Part 3: Polishers and rotary , orbital and random orbital sanders.

31
Troubleshooting Guide
AOS130NV Rev 01/05/17
Symptom Possible Cause Solution
Low power and/or low free
speed.
Insufcient air pressure. Check air line pressure at the Inlet of the tool while
the tool is running at free speed. It must be 6.2 bar
(90 psig/620 kPa).
Clogged Mufer)s(. The Mufer can be back-ushed with a clean, suit-
able cleaning solution until all contaminates and
obstructions have been removed. If the Mufer can
not be properly cleaned then replace it. Replace
Mufer Insert.
Plugged Inlet Screen. Clean the Inlet Screen with a clean, suitable
cleaning solution. If the Screen cannot be cleaned,
replace it.
One or more worn or broken vanes. Install a complete set of new Vanes (all vanes must
be replaced for proper operation(. Coat all vanes
with quality pneumatic tool oil.
Internal air leakage in the Motor Housing
indicated by higher than normal air con-
sumption and lower than normal speed.
Check for proper Motor alignment and O-Ring
engagement. Check for damaged O-Ring in Front
End Plate. Remove Motor Assembly and re-install
the Motor Assembly.
Motor parts worn. Overhaul Motor. Contact authorized Mirka Service
Center.
Worn or broken Spindle Bearings. Replace the worn or broken Bearings.
Air leakage through the Air
Regulator and/or Valve Stem.
Dirty, broken or bent Valve Spring, Valve
or O-Ring.
Disassemble, inspect and replace worn or dam-
aged parts.
Vibration/rough operation.
Incorrect Pad. Only use Pad sizes and weights designed for the
machine.
Addition of interface pad or other material. Only use abrasives and/or interfaces designed for
the machine. Do not attach anything to the Tool’s
Pad face that was not specically designed to be
used with the Pad and Tool.
Improper lubrication or buildup of foreign
debris.
Disassemble the Tool and clean in a suitable
cleaning solution. Reassemble the Tool.
Worn or broken Rear or Front Motor
Bearing(s).
Replace the worn or broken Bearings.

MIRKA LTD
Finland
Brazil Mirka Brasil Ltda.
Canada Mirka Canada Inc.
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Finland & Baltics Mirka Ltd
France Mirka France Sarl
Germany Mirka GmbH
India Mirka India Pvt Ltd
Italy Mirka Italia s.r.l.
Mexico Mirka Mexicana S.A. Of C.V
Russia Mirka Rus LLC
Singapore Mirka Asia Pacific Pte Ltd
Spain KWH Mirka Ibérica S.A.U.
Sweden Mirka Scandinavia AB
Turkey Mirka Turkey Zımpara Ltd Şirketi
United Kingdom Mirka (UK) Ltd
United Arab Emirates Mirka Middle East FZCO
USA Mirka USA Inc.
For contact information,
please visit www.mirka.com
© Mirka Ltd • 03/2017