RANDOM ORBITAL SANDER
INSTRUCTION MANUAL
127 mm (5 in) and 150 mm (6 in) 12,000 RPM
Important Safety Information
Please read, understand and follow all safety information contained in these instructions prior to the use of this tool. Retain these
instructions for future reference.
Intended Use
This pneumatic tool is intended for use in industrial locations, and used only by skilled, trained professionals in accordance with the
instructions in this manual. This pneumatic tool is designed to be used with a disc pad and appropriate abrasive for sanding metals,
wood, stone, plastics and other materials. It should only be used for such sanding applications and within marked capacity and ratings.
Only accessories specifically recommended by 3M should be used with this tool. Use in any other manner or with other accessories
could lead to unsafe operating conditions.
Do not operate tool in water or in an excessively wet application.
Do not use disc pads that have a Max RPM or Max OPM less than the tool Max RPM or Max OPM rating. Never use disc pads that have
a weight and/or size different than what the tool was specifically designed for.
Explanation of Signal Word Consequences
WARNING:
CAUTION:
Indicates a potentially hazardous situation which, if not avoided, may result in death or serious injury
and/or property damage.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury and/or property damage.
WARNING
To reduce the risks associated with impact from abrasive product, disc pad, or tool breakup, sharp edges, hazardous
pressure, rupture, vibration and noise:
• Read, understand and follow the safety information contained in these instructions prior to the use of this tool. Retain these
instructions for future reference.
• Only personnel who are properly trained should be allowed to service this tool.
• Practice safety requirements. Work alert, have proper attire, and do not operate tools under the inuence of alcohol or drugs.
• Operators and other personnel must always wear protection for eyes, ears, and respiratory protection when in the work area or
while operating this product. Follow your employer’s safety policy for PPE’s and/or ANSI Z87.1 or local/national standards for
eyewear and other personal protective equipment requirements.
• Wear protective apparel, taking into consideration the type of work being done.
• Never exceed marked maximum input pressure (90psi / .62Mpa / 6.2Bars).
• Proper eye protection must be worn at all times.
• Tool shall not be operated in the presence of bystanders.
• If you notice any abnormal noise or vibration when operating the tool, immediately discontinue its use and inspect for worn or
damaged components. Correct or replace the suspect component. If abnormal noise or vibration still exists, return the tool to 3M
for repair or replacement. Refer to warranty instructions.
• Never operate this tool without all safety features in place and in proper working order.
• Never over-ride or disable the safety features of the start-stop control such that it is in the on position.
• Make sure the tool is disconnected from its air source before servicing, inspecting, maintaining, cleaning, and before changing
abrasive product.
• Prior to use, inspect abrasive product and accessories for possible damage. If damaged, replace with new abrasive product and
accessories available from 3M.
• Only use accessories supplied or recommended by 3M.
• Never allow this tool to be used by children or other untrained people.
• Do not leave an unattended tool connected to air source.
• Immediately discontinue use of tool if its noise reduction mufer system has been damaged or is otherwise not functioning
properly. Have tool repaired before placing back into use.
3M™ 5 in & 6 in Random Orbital Sander 1 Revision 051210
Original Instructions
WARNING
To reduce the risks associated with vibration:
• If any physical hand/wrist discomfort is experienced, work should be stopped promptly to seek medical attention. Hand, wrist and
arm injury may result from repetitive work, motion and overexposure to vibration.
To reduce the risks associated with loud noise:
• Always wear hearing protection while operating this tool. Follow your employer’s safety policy or local/national standards for
personal protective equipment requirements.
To reduce the risks associated with fire or explosion:
• Do not operate the tool in explosive atmospheres, such as in the presence of ammable liquids, gases, or dust. The abrasives are
able to create sparks when working material, resulting in the ignition of the ammable dust or fumes.
• Refer to MSDS of material being worked as to potential for creating re or explosion hazard.
To reduce the risks associated with hazardous dust ingestion or eye/skin exposure:
• Use appropriate respiratory and skin protection, or local exhaust as stated in the MSDS of the material being worked on.
To reduce the risks associated with hazardous voltage:
• Do not allow this tool to come into contact with electrical power sources as the tool is not insulated against electrical shock.
CAUTION
To reduce the risks associated with skin abrasion, burns, cuts, or entrapment:
• Keep hands, hair, and clothing away from the rotating part of the tool.
• Wear suitable protective gloves while operating tool.
• Do not touch the rotating parts during operation for any reason.
• Do not force tool or use excessive force when using tool.
To reduce the risks associated with whipping or hazardous pressure-rupture:
• Ensure supply hose is oil resistant and is properly rated for required working pressure.
• Do not use tools with loose or damaged air hoses or ttings.
• Be aware that incorrectly installed hoses and ttings might unexpectedly come loose at any time and create a whipping/impact
hazard.
To reduce the risks associated with fly off of abrasive product or parts:
• Use care in attaching abrasive product and disc pad; following the instructions to ensure that they are securely attached to the tool
before use.
• Never free spin the tool or otherwise allow it to be started unintentionally.
• Never point this product in the direction of yourself or another person, or start tool unintentionally.
Item3M Part NumberUPCDescriptionQty.
1A004028113EXTERNAL RETAINING RING1
2A002128107BEARING - 2 SHIELDS1
3B001728173REAR ENDPLATE1
4A000528094CYLINDER ASSEMBLY1
5A0042281155 mm x 2 mm O-RING1
6B000528170ROTOR1
7A001028099VANE5
8A004128114WOODRUFF KEY1
9B001628172FRONT ENDPLATE1
10A001928106BEARING - 2 SHIELDS1
11A00452811839.4 mm x 3.1mm O-RING1
12A000128093LOCK RING1
13B0279281805 in x 3/32 in ORBIT SHAFT BALANCER1
B0277281785 in x 3/16 in ORBIT SHAFT BALANCER1
B0348303255 in x 5/16 in (8.0 mm) ORBIT ROS BALANCER1
B0278281796 in x 3/16 in ORBIT SHAFT BALANCER1
B0280281816 in x 3/32 in ORBIT SHAFT BALANCER1
B0334281846 in x 5/16 in (8 mm) ORBIT SHAFT BALANCER1
14A012228132FILTER1
15A012128131DUCKBILL CHECK VALVE1
16A012028130VALVE RETAINER1
17N/AN/AN/A1
18A093828148DOUBLE ROW ANGULAR CONTACT BEARING - SEAL1
19A001628103SPACER 12.1 mm ID x 18.0 mm OD x 0.2 mm THK1
20A001728104BELLEVILLE WASHER1
21A001828105RETAINING RING1
22B001828174SPINDLE1
23A135128163LEVER FOR 2.5 mm (3/32 in) ORBIT1
A135228164LEVER FOR 5.0 mm (3/6 in) ORBIT1
A144728169LEVER FOR 8 mm (5/6 in) ORBIT1
24A003128109LEVER SPRING PIN1
252034220342GRIP 2.5 inOPT
2034320343GRIP 2.75 in1
2034420344GRIP 3 inOPT
26A001528102VALVE SLEEVE1
27A133028150HOUSING1
28A000828097VALVE STEM ASSEMBLY1
29A0043281169.0 mm x 1.5 mm O-RING1
30B001428171SPEED CONTROL1
31A003928112INTERNAL RETAINING RING1
32A1346281585/6 in NON-VACUUM SHROUD1
33A1347281595/6 in SHROUD1
A134828160Ø 6 In CLEAN SANDING ROS DISC PAD SHROUD1
35A00222810824 mm PAD WRENCH1
36N/AN/ADISC PAD SUPPLIED WITH EACH TOOL (TYPE DETERMINED BY MODEL)1
37A006228121INTERNAL MUFFLER1
38A006828122MUFFLER INSERT1
39A016628138MUFFLER HOUSING1
40A000928098VALVE SEAT1
41A000728096VALVE1
42A001428101VALVE SPRING1
43A001328100INLET BUSHING ASSEMBLY1
44A00442811714 mm x 1.5 mm O-RING2
45A000628095SGV RETAINER1
46A0778281461 in/28 mm HOSE SEAL1
47A133828156ASSEMBLY FOR 1 in/28 mm HOSE SGV SWIVEL EXHAUST FITTING1
48N/AN/ATAG W/ INSTRUCTION FOR 1 in/28 mm HOSE SEAL1
49N/AN/A3/4 in/19 mm HOSE SEALN/A
50N/AN/AASSEMBLY FOR 3/4 in/19 mm HOSE SGV SWIVEL EXHAUST FITTINGN/A
51A133328153SGV SKIRT/SHROUD ADAPTER1
522830128301VACUUM HOSE, 1 in ID x 6 ftOPT
532830228302VACUUM HOSE ADAPTOR, 1 in Internal Hose ThreadOPT
54A134328157ASSEMBLY FOR ROS CV 1 in/28 mm SWIVEL EXHAUST1
55A004828120FLANGED NUT1
56A134528157ASSEMBLY FOR ROS CV 3/4 in. SWIVEL EXHAUSTOPT
57A004728119WASHER1
58A076928145SCREW1
59A143428303VACUUM BAG COVER (CLOTH)OPT
602033820338VACUUM BAG INSERT (PAPER)OPT
612045220452CLEAN SANDING FILTER BAG1
622045320453FILTER BAG ADAPTOR1
632034120341VACUUM HOSE FITTING ADAPTOR, 1 in Internal Hose Thread x 1-1/2 in OD Hose AdpatorOPT
642020920209RANDOM ORBITAL SANDER AIR LINE EXTENSION, 3/8 in x 4 ftOPT
3M™ 5 in & 6 in Random Orbital Sander 3 Revision 051210
Product Configuration/Specifications: 12,000 RPM Random Orbital Sander
Note: All Vacuum machines use Ø 28 mm (1 in.) Vacuum Hose Fittings.
Orbit Pad Face
2.5 mm
(3/32 in)
5 mm
(3/16 in)
8 mm
(5/16 in)
† Available only in Europe.
‡ Available only in APAC.
* Declared noise levels; measurements carried out in accordance with standard EN ISO 15744:2008.
** Declared vibration levels in accordance with EN12096; measurements carried out in accordance with standard EN ISO 8662-8:1997.
IMPORTANT NOTE: The noise and vibration values stated in the table are from laboratory testing in conformity with stated codes and
standards and are not sufficient risk evaluation for all exposure scenarios. 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 condition of
the user. 3M™ cannot be held responsible for the consequences of using declared values instead of actual exposure values for any
PRIOR TO THE OPERATION
The tool is intended to be operated as a hand held tool. It is always recommended that while using the tool, operators stand on a
solid oor, in a secure position with a rm grip and footing. Be aware that the sander can develop a torque reaction. See the section
“SAFETY PRECAUTIONS”.
Use a clean lubricated air supply that will give a measured air pressure at the tool of 6.2 bar (90 psig) when the tool is running 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. Connect the tool
to the air supply as shown in Figure 1. Do not connect the tool to the airline system without an easily accessible air shut off valve. It is
strongly recommended that an air lter, regulator and lubricator (FRL) be used as shown in Figure 1as this will supply clean, lubricated
air at the correct pressure to the tool. In any case appropriate air pressure regulators shall be used at all times while operating this
tool where the supply pressure exceeds the marked maximum of the tool. Details of such equipment can be obtained for your tool
distributor. If such equipment is not used, 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 3M™ Air Tool Lubricant PN 20451, Fuji Kosan FK-20, Mobil
ALMO 525 into the hose end (inlet) of the tool. Reconnect tool to the air supply and run 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 be 6.2 bar (90 psig) while the tool is running so the maximum RPM is not exceeded. The
tool can be run at lower pressures but should never be run higher than 6.2 bar (90 psig). If run at lower pressure the performance of
the tool is reduced.
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
Recommended Airline
Size - Minimum
10 mm 3/8 in
Recommended Maximum
Hose Length
8 meters 25 feet
Maximum Working Pressure 6.2 bar 90 psig
Air Pressure
Recommended Minimum NA NA
Safety Precautions
1. Read all instructions before using this tool. All operators
must be fully trained in its use and aware of these safety
rules.
2. The tool RPM should be checked on a regular basis to
ensure proper operating speed.
3. Make sure the tool is disconnected from the air supply.
Select a suitable abrasive and secure it to the disc pad. Be
careful to center the abrasive on the disc pad.
4. Always wear required safety equipment when using this
tool.
5. When sanding/bufng always start the tool on the
workpiece. This will prevent gouging due to excess speed
of the buff pad. Stop air ow to the tool as it is removed
from the workpiece.
6. Always remove the air supply to the sander before fitting,
adjusting or removing the abrasive or disc pad.
7. Always adopt a firm footing and grip and be aware of
torque reaction developed by the sander.
8. Use only 3M approved spare parts.
9. Always ensure the material being sanded is rmly xed to
avoid movement.
10. Check hose and fittings 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.
11. Dust can be highly combustible.
12. If tool is serviced or rebuilt check to ensure that the
maximum tool RPM is not exceeded and that there is no
excessive tool vibration.
13. Do not exceed maximum recommended air pressure.
Use safety equipment as recommended.
14. Prior to installing any sanding or polishing accessory,
always check that its marked maximum operating speed
is equal or higher than the rated speed of this tool.
15. The tool is not electrically insulated. Do not use where
there is a possibility of contact with live electricity, gas
pipes, and/or water pipes.
16. This tool is not protected against hazards inherent in
grinding and cutting operations and no such accessories
should ever be attached.
17. Take care to avoid entanglement with the moving parts
of the tool with clothing, ties, hair, cleaning rags or loose
hanging objects. If entangled, stop air supply immediately
to avoid contact with moving tool parts.
18. Keep hands clear of the spinning pad during use.
19. If the tool appears to malfunction, remove from use
immediately and arrange for service and repair.
20. Immediately release the start handle in the event of any
disruption of pressure; do not attempt to re-start until the
disruption has been corrected.
21. When tool is not in use, store in a clean dry environment
free of debris.
22. Recycle or dispose of tool according to Local, State, and
Federal Regulations.
3M™ 5 in & 6 in Random Orbital Sander 5 Revision 051210
3M Disc Pads are perfectly mated for use on the 3M Sander.
Constructed from premium, industrial-quality materials and
featur ing a riveted fiberglass and steel hub with molded urethane,
their durability and precise construction are the ideal complement
to the performance of the 3M Sander. See Product Configuration/
Specifications table for the correct replacement pad for a
particular model. The following chart is a sample of products
offered.
DescriptionPart number
3M™ Stikit™ Low Prole Disc Pad 5 in., non-vacuum20351
3M™ Hookit™ Low Prole Disc Pad 5 in., non-vacuum20352
See 3M ASD Accessory catalog 61-5002-8098-9 for additional
Accessories.
Removing and Mounting Disc Pad to Random
1. Disconnect air line from sander.
2. Remove old disc pad from sander by inserting the wrench,
supplied with the tool, between the rubber shroud and the
disc pad. Use the wrench to secure the sander spindle while
turning the disc pad counter clockwise.
3. After the old disc pad has been removed from the sander,
inspect the threaded hole in the spindle to ensure that the
threads are free of debris and undamaged.
4. Ensure that the phenolic washer is in place around the
threaded shaft of the new disc pad.
5. Secure the sander spindle with the wrench and tighten the
new disc pad securely to the tool.
An inadequately tightened disc pad could cause the threaded
spindle to break causing damage to the tool and work piece and
possible injury to the operator or bystanders.
3M™ Disc Pads
Orbital Sander
WARNING
Figure 1
Product Use: All statements, technical information and
recommendations contained in this document are based
up on tests or experience that 3M believes are reliable.
However, many factors beyond 3M’s control can affect
the use and performance of a 3M product in a particular
application, including the conditions under which the 3M
product is used and the time and environmental conditions
in which the product is expected to perform. Since these
factors are uniquely within the user’s knowledge and
control, it is essential that the user evaluate the 3M product
to determine whether it is fit for a particular purpose and
suitable for the user’s method of application.
Warranty and Limited Remedy: 3M warrants this tool
against defects in workmanship and materials under
normal operating conditions for one (1) year from the date
of purchase. 3M MAKES NO OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE OR ANY
IMPLIED WARRANTY ARISING OUT OF A COURSE
OF DEALING, CUSTOM OR USAGE OF TRADE. User is
responsible for determining whether the 3M tool is fit for a
particular purpose and suitable for user’s application. User
must operate the tool in accordance with all applicable
operating instructions, safety precautions, and other procedures
stated in the operating manual to be entitled to warranty coverage.
3M shall have no obligation to repair or replace any tool or part that
fails due to normal wear, inadequate or improper maintenance,
inadequate cleaning, nonlubrication, improper operating
environment, improper utilities, operator error or misuse, alteration
or modification, mishandling lack of reasonable care, or due to any
accidental cause. If a tool or any part thereof is defective within this
warranty period, your exclusive remedy and 3M’s sole obligation
will be, at 3M’s option, to repair or replace the tool or refund the
purchase price.
Limitation of Liability: Except where prohibited by law, 3M
and seller will not be liable for any loss or damage arising from
the 3M product, whether direct, indirect, special, incidental or
consequential, regardless of the legal theory asserted, including
warranty, contract, negligence or strict liability.
Submitting a Warranty Claim: Contact your dealer when
submitting a warranty claim in accordance with the restrictions
listed above. Please note that all warranty claims are subject to
manufacturer’s approval. Be sure to keep your sales receipt in a
safe place. This must be submitted when filing a warranty claim,
within 1 year from the date of purchase. For additional assistance