Alpha Tool.Com.HK Limited Polisher AIR300 User Manual

							Part No: AIR-300
Version 1
103 Bauer Drive, Oakland, NJ 07436 • 800-648-7229 • Fax: 800-286-0114
www.alpha-tools.com
Alpha
®
 Mini Air Polisher
Instruction Manual
MANUAL
For repair information call:
Headquarters, Oakland, NJ — (800) 648-7229
Due to specially designed components this machine must be serviced only 
with genuine ALPHA® parts.
(Shown with optional Backer Pad / sold separately) 
						

							2
TABLE OF CONTENTS
Introduction .................................................................................3
About the Symbols .....................................................................3
Safety Instructions for Power Tools  ...........................................3
Air-300 Overview ........................................................................6
Special Feature  .........................................................................6
Specifi cations .............................................................................6
Accessories  ...............................................................................6
Tool Set-up Information ..............................................................6
   Attaching the Water, Air and Exhaust Hose to the Body ..........6
Air Fittings And Pressure  ...........................................................7
Spindle Size  ..............................................................................8
Air Valve Lever  ..........................................................................8
Water Supply Hose  ....................................................................9
Silencer / Muffl er  .......................................................................9
Maximum Size for Polishing Pads ..............................................9
Alpha
® Air-300  Mini Air  Polisher  Schematic ..............................10
Alpha
® Air-300  Mini Air  Polisher  Parts  List ................................ 11
Appendix A 
   Greasing the Tool Housing ....................................................12
Accessories and Factory Service .............................................14
Product Registration Card ........................................................15 
						

							3
 INTRODUCTION
Thank you for purchasing an Alpha® Air Polisher.  This polisher is ideal for intricate 
polishing such as bowl or sink-rim applications.  A wide range of accessories help 
you perform many different tasks.  This tool lets you polish all kinds of granite, 
marble, engineered stone and concrete.  You can easily change from one type of 
disc to another in just a matter of seconds.  The tool is used with water to help you 
get the best possible fi nish, to reduce the health risks of dust, and to give the most 
savings in time and money from modern accessories.  For your safety, please read 
this manual thoroughly before you start operating this polisher. 
 ABOUT THE SYMBOLS
According to the hazard level, all safety notes in this manual are classifi ed into 
“DANGER”,  “WARNING”, and “CAUTION”.
  DANGER!  Death or serious personal injury is imminent when handling 
this polisher incorrectly.
  WARNING!  There is a possibility of death or serious personal injury when 
handling this polisher incorrectly. 
  CAUTION!  There is a possibility of personal injury or property damage 
when handling this polisher incorrectly.
Note:    In some situations, failing to observe WARNING notes could result in  
death or serious personal injury.  Be sure to read and observe the safety 
notes to ensure safety and correct use of the polisher.  
 SAFETY INSTRUCTIONS FOR POWER TOOLS 
KNOW YOUR POWER TOOL.  Read owner’s manual carefully.  Learn its 
applications and limitations as well as specifi c potential hazards particular 
to this tool. 
KEEP WORK AREA CLEAN. Cluttered areas and benches invite 
accidents. 
AVOID DANGEROUS ENVIRONMENTS.  Keep work areas as dry as 
possible.  Do not use tool in presence of fl ammable liquids or gases.  Keep 
the area well lit. 
KEEP CHILDREN AND VISITORS AWAY.  All visitors should be kept a safe 
distance from the work area. Keep out of reach of children.   1.
2.
3.
4. 
						

							4
DON’T FORCE TOOL.  It will do the job better and safer at the rate for 
which it was designed. 
WEAR PROPER APPAREL.  Do not wear loose clothing or jewelry as it can 
get caught in moving parts. Rubber gloves and insulated non-skid footwear 
are recommended.  Wear protective covering to contain long hair. 
WEAR PROPER EYE PROTECTION.  Use safety glasses at all times.  Also, 
use a face mask if work area is dusty. 
WEAR PROPER EAR PROTECTION.  Wear ear protectors when using 
for extended periods. 
DON’T ABUSE WATER SUPPLY HOSE.  Don’t carry tool by supply hose 
or expose to traffi c areas where it can be crushed. 
ALWAYS SECURE WORK PIECE.  Use clamps or a vise to hold work.  It’s 
safer than using your hand and it frees both hands to operate tool. 
DON’T OVERREACH.  Keep proper footing and balance at all times. 
DISCONNECT TOOLS WHEN NOT IN USE.  Always disconnect tool before 
servicing; when changing accessories such as grinding wheels, backer 
pads, etc.
REMOVE ADJUSTING KEYS AND WRENCHES.  Form a habit of checking 
to see that keys and adjusting wrenches are removed from tool before 
turning it on. 
MAINTAIN TOOLS WITH CARE.   Keep tools clean at all times for best 
and safest performance.  Follow instructions for lubricating and changing 
accessories.  Keep handles dry, clean and free of oil or grease.  Inspect 
moving parts for alignment and binding as well as for breakage and improper 
mounting. 
AVOID ACCIDENTAL STARTING.   Don’t carry a “connected” tool, or make 
adjustments, or change discs without making sure the air valve is in the off 
position to prevent the fl ow of air.
USE ONLY RECOMMENDED ACCESSORIES. The use of any accessories 
other than what is listed or recommended for this particular tool may be 
hazardous. 
KEEP HANDS AWAY FROM ALL MOVING PARTS. 
USE SIDE HANDLES.  Supplied with tool for control and safety. 
STAY ALERT.   Watch what you are doing and use common sense.  Do 
not operate tool when you are tired, or under the infl uence of medication 
or alcohol. 5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19. 
						

							5
 AIR-300 OVERVIEW
 SPECIAL FEATURE 
The Alpha® Air Polisher was designed with human engineering for operator comfort.  
It comes equipped with a silencer which reduces the level of noise as well as 
guiding the cold exhaust air away from an operator during the polishing process.  
This feature also eliminates excess lubricant dripping on the work piece.  Portions 
of the body design are made with synthetic materials and covered with rubber to 
prevent fatigue and coldness to hands. 
 SPECIFICATIONS
RPM WeightAir 
ConsumptionAir 
PressureAir 
InletWater
 InletSpindle
U.S.
No Load 5,8001.60 lb 10 CFM 87 PSI
BSPT 1/4” BSPP 1/4” 5/8”-11
METRIC.731 kg 280 ℓ/ Min 0.6Mpa (6 bar)
Backer Pad(Optional / sold separately)
10 ft Water Hose
10 ft Air Hose Adjustable Air Valve
Adjustable Water Valve Rubber Body cover External Water Line
Figure-1 
						

							6
 ACCESSORIES 
  Water hose (10 ft / 3m) ....................................................... 1pc
  Air hose (10 ft / 3m) ............................................................ 1pc    
  Wrench (17mm) ................................................................. 1pc          
  Lubrication Oil (1oz / 30 cc 
sample bottle) ............................... 1pc
 Faucet/Garden Hose Adapter ............................................ 1pc
 TOOL SET-UP INFORMATION
Unpack the tool carefully and study the helpful hints and warnings contained in this 
manual.  Please take time to familiarize yourself with the features of the tool.  See 
page 15 for more information about product registration or visit us on the web at 
www.alpha-tools.com.
Attaching the Water, Air and Exhaust Hoses to the body
Endcase
Exhaust Hose
Hose BandWater Hose Air Hose
Hose Band
Push Air Hose through open end 
in the exhaust hose as shown in 
the Figure 3. 1. Slide hose band over exhaust 
hose as shown in Figure 4. 2.
Air Hose
Hose Fitting
Water Valve
Figure-2
Figure-3Figure-4
[...]
[...] 
						

							7
 AIR FITTINGS AND PRESSURE 
Your new Alpha® polisher is designed for continuous duty polishing.  When select-
ing your compressor, buy a system which can handle a constant fl ow of air.  We 
recommend that you purchase a heavy duty two stage cast iron type unit. The 
system should include a regulator and a moisture trap.
Each tool requires: 87 PSI (
0.6Mpa / 6 bars); however the range of 85-90 PSI 
is acceptable. (6 kg / cm
2) of air pressure and 10 
CFM (280 
 ℓ / min.) of air fl ow. 
Although a 3HP air compressor 
delivers suffi cient air pressure /  
volume, we suggest a minimum 
of 5 HP air compressor with a 
holding tank of 50 cubic feet 
(1,400 l) capacity for one tool.  
Air hose fi tting is BSPT 1/4” 
The use of heavy duty 3/8” 
(10mm) hose is suggested for all 
lines. •
•
•
•
Air Valve LeverAir Hose Water Hose
Water Valve
Union Nut
Hose Insert
Hose BandHose Fitting
Endcase
Exhaust Hose
Figure-10
Push air hose into hose fi tting. 3.Insert water hose into water valve 
and tighten. 4.
Place exhaust hose over valve 
case. 5.Slide hose band onto groove in 
valve casing for a snug fi t. 6.
Figure-5Figure-6
Figure-7Figure-8
Figure-9 
						

							8
 LUBRICATION (Lube Oil is used to protect the tool from rusting when not in use) 
PROPER CARE AND LUBRICATION ARE IMPORTANT FACTORS IN THE USEFUL 
LIFE OF THIS TOOL. 
At the end of each workday, 2-3 drops of lubricant oil, solvent free oil (included with 
each polisher) should be placed in the air inlet at the base of the tool. Rotate the 
spindle counter clockwise, by hand 3-4 revolutions.  Reinstall the air hose and run 
the tool for a minute or two. (Replacement containers of oil may be purchased from 
Alpha Professional Tools
® Part # AIR-008.)  
Maintenance and Usage Tip
Automatic oilers are not recommended: the volume, grade, and composition of oil 
used may cause premature failure. In-line air dryers are recommended to extend 
the life of the tool. Old or worn compressors, which emit oil through the air lines, 
can dramatically shorten the life of the tool. 
 SPINDLE SIZE 
The Alpha® AIR-300 air polisher features a 5/8”-11 size spindle.  This tool has 
been designed for portable/shop production and uses all modern accessories.  
It is very important that you do not run anything heavier than the recommended 
accessories on this machine.  A drop of oil should be applied to the outside 
threads whenever attachments are changed to facilitate removal and prevent 
rust.  A 17mm Spindle Wrench is provided to assist in changing accessories. 
Maintenance and Usage Tip
Do not leave the tool submersed in water. This could expose the inner 
moving parts to moisture, which will shorten the life of the tool.
Do not leave threaded accessories (backer pads) on the spindle of tool for 
extended periods of time; this may result in making it diffi cult to remove 
these accessories.
Excessive force or impact to the spindle may result in premature failure of 
gears and/or bearings, which may not be immediately evident.
 AIR VALVE LEVER 
The valve lever controls the fl ow of air through the 
tool.  It has two positions- ON or OFF.  Run the tool 
at the recommended range of 87 PSI, with the lever 
pointing to the ON position.  This will produce 5,800 
RPM. Do not try to vary the speed.  The tool works 
best at full throttle only. Do not attempt to exceed the 
recommended speed by excess pressure.
•
•
•
Figure-11 
						

							9
 WATER CONTROL VALVE 
This valve lets you adjust the fl ow of water through the spindle. It may be used to 
shut off the water entirely when changing discs. When storing the tool overnight, 
open the valve and drain all water from the supply hose and tool. 
Maintenance and Usage Tip
Do not apply more force or pressure than the force created by the weight of the 
polisher itself.  The polishing discs are designed to work properly under lightweight 
pressure.  Applying excessive force or pressure may damage the disc and could 
shorten the life of the tool.
 WATER SUPPLY HOSE 
This hose may be connected to any garden hose using a clamp.  The hose is com-
posed of a special material to avoid kinks.  Replacements are available should the 
hose become damaged, 
Part # 133229.
 SILENCER / MUFFLER 
To comply with OSHA Occupational Noise Exposure Standard Number 1926.52, 
this polisher is equipped with an internal Silencer System.  When the polisher is 
operated correctly at 87 PSI, the sound level emitted should be less than 80 dBA. 
The internal Silencer System is also used to maintain a constant back pressure 
inside the tool; this helps prevent it from exceeding the recommended 5,800 RPM.  
The exhaust hose for this tool also helps to reduce the noise level by venting the 
exhaust air and residual air-line, thus eliminating the risk of excess lubricant drip-
ping on the work piece.  
 MAXIMUM SIZE FOR POLISHING PADS
The Alpha
® AIR-300 accepts ONLY 3” and 4” discs along with 2”, 3” and 4” 
rubber pads.  
						

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   ALPHA® AIR-300 MINI AIR POLISHER SCHEMATIC
Optional Accessories
5758