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Important Operating, Maintenance and Safety Instructions

Carefully read all instructions before operating or servicing any Dynabrade

®

Abrasive Power Tool.

Warning: Hand, wrist and arm injury may result from repetitive work motion and overexposure to vibration.
Important: All Dynabrade Rotor Vane air tools must be used with a Filter-Regulator-Lubricator to maintain all warranties.

Operating Instructions:

Warning:

Eye, face, respiratory, sound, and body protection must be worn while operating power tools.  Failure to do so may result in serious injury or
death.  Follow safety procedures posted in workplace.

1. With power source disconnected from tool, securely fasten abrasive/accessory on tool.
2. Install air fitting into inlet bushing of tool.  Important:  Secure inlet bushing of tool with a wrench before attempting to install the air fitting to avoid

damaging valve body housing.

3. Connect power source to tool.  Be careful not to depress throttle lever in the process.
4. Check tool speed with tachometer.  If tool is operating at a higher speed than the RPM marked on the tool or operating improperly, the tool should be 

serviced to correct the cause before use.

Maintenance Instructions:

1. Check tool speed regularly with a tachometer.  If tool is operating at a higher speed than the RPM marked on the tool, the tool should be serviced to

correct the cause before use.

2. Some silencers on air tools may clog with use.  Clean and replace as required.
3. All Dynabrade Rotary Vane air motors should be lubricated.  Dynabrade recommends one drop of air lube per minute for each 10 SCFM (example:  if 

the tool specifications state 40 SCFM, set the drip rate of your filter-lubricator at 4 drops per minute).
Dynabrade Air Lube (P/N 95842:  1pt. 473ml.) is recommended.

4. An Air Line Filter-Regulator-Lubricator must be used with this air tool to maintain all warranties.  Dynabrade recommends the following:  11405 Air Line

Filter-Regulator-Lubricator — Provides accurate air pressure regulation, two-stage filtration of water contaminants and micro-mist lubrication of
pneumatic  components.  Operates 40 SCFM @ 100 PSIG has 3/8" NPT female ports.

5. Use only genuine Dynabrade replacement parts.  To reorder replacement parts, specify the Model #Serial #, and RPM of your machine.
6. A Motor Tune-Up Kit (P/N 96107) is available which includes assorted parts to help maintain motor in peek operating condition.
7. Mineral spirits are recommended when cleaning the tool and parts.  Do not clean tool or parts with any solvents or oils containing acids, esters,

keytones, chlorinated hydrocarbons or nitro carbons.

2

(APD01•06)

One Year Warranty

Following the reasonable assumption that any inherent defect which might prevail in a product will become apparent to the user within one year from the date
of purchase, all equipment of our manufacture is warranted against defects in workmanship and materials under normal use and service.  We shall repair or 
replace at our factory, any equipment or part thereof which shall, within one year after delivery to the original purchaser, indicate upon our examination to 
have been defective.  Our obligation is contingent upon proper use of Dynabrade tools in accordance with factory recommendations, instructions and safety 
practices.  It shall not apply to equipment which has been subject to misuse, negligence, accident or tampering in any way so as to affect its normal 
performance.  Normally wearable parts such as bearings, contact wheels, rotor blades, etc., are not covered under this warranty.

Important: User of tool is responsible for following accepted safety codes such as those published by the American National Standards Institute (ANSI).

Operate machine for one minute before application to workpiece to determine if machine is working properly and safely before work begins.

Always disconnect power supply before changing abrasive/accessory or making machine adjustments.

Inspect abrasives/accessories for damage or defects prior to installation on tools.

Please refer to Dynabrade’s Warning/Safety Operating Instructions Tag (Reorder No. 95903) for more complete safety information.

Notice

All Dynabrade motors use the highest quality parts and metals available and are machined to exacting tolerances.  The failure of quality pneumatic motors 
can most often be traced to an unclean air supply or the lack of lubrication.  Air pressure easily forces dirt or water contained in the air supply into motor
bearings causing early failure.  It often scores the cylinder walls and the rotor blades resulting in limited efficiency and power.  Our warranty obligation is con-
tingent upon proper use of our tools and cannot apply to equipment which has been subjected to misuse such as unclean air, wet air or a lack of lubrication
during the use of this tool.

Safety Instructions:

Products offered by Dynabrade should not be converted or otherwise altered
from original design without expressed written consent from Dynabrade, Inc.

Model

Motor

Motor

Dia. Orbit 

Sound

Air Flow Rate

Air Pressure

Spindle

Weight

Length

Height

Number

HP (W)

RPM

Inch (mm)

Level

CFM/SCFM (LPM)

PSIG (Bars)

Thread

Pound (kg)

Inch (mm)

Inch (mm)

Orbital Sanders

.25 (186)

2,400

3/16" (5)

79 dB(A)

3/18 (510)

90 (6.2)

1/4"-20 male

1.9 (.9)

5-3/8 (137)

3-5/8 (92)

Buffers

.25 (186)

2,400

N/A

79 dB(A)

3/18 (510)

90 (6.2)

1/4"-20 male

1.9 (.9)

5-3/8 (137)

4-1/4 (108)

Additional Specifications:  Air Inlet Thread 1/4" NPT •  Hose I.D. Size 1/4" (8 mm)

Summary of Contents for 10390

Page 1: ...etaining Ring 4 95593 Set Screw 5 54468 Ring Gear 6 54465 Planetary Carrier 7 06213 Gears 2 8 54475 Shaft 2 9 07146 Packing 10 57059 Lock Ring 11 95973 Washer 12 57055 Front Ring 13 57437 Front Bearing Plate 14 54470 Rotor Pinion 15 56047 Rotor Key 16 95975 Shim Pack 4 pkg 17 54491 Rotor Blade Set 5 18 57058 Cylinder Assembly Incl 95971 Line Up Pin 19 95971 Pin 20 57056 Rear Bearing Plate 21 01206...

Page 2: ...ne Year Warranty Following the reasonable assumption that any inherent defect which might prevail in a product will become apparent to the user within one year from the date of purchase all equipment of our manufacture is warranted against defects in workmanship and materials under normal use and service We shall repair or replace at our factory any equipment or part thereof which shall within one...

Page 3: ...et onto rotor pinion Important Place the correct number of shims from the 95975 Shim Pack under rotor to achieve a 0 0015 space between rotor and front plate Note Blades should be lightly lubricated with Dynabrade Air Lube P N 95842 or equivalent before installation into rotor slots 5 Place 57058 Cylinder Assembly over rotor The short line up pin goes toward the front plate 6 Place 57056 Rear Plat...

Page 4: ...hetic Wool 3 90030 Foam Waffle 3 90038 Foam Flat Face 3 1 2 90034 Natural Wool Scrim back Mount to 50120 or 50125 Hook Face Pads 1 4 Sponge 60 Duro Rubber 1 4 20 Female Thread 1 4 20 Female Thread Order vinyl face pads 54091 or 54092 for wet sanding operations For use with abrasive impregnated non woven nylon discs Soft Density All pads are 5 000 RPM maximum Medium Dual Density Hook n Loop 54017 3...

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