Alpha AIR-300/304 Pneumatic Polisher
The Alpha AIR-300/304 Pneumatic Polisher is engineered for specialized applications that are challenging to achieve with conventional polishers. As a compact version of the renowned Alpha AIR-658, this model is ergonomically designed to fit comfortably in the hand, weighing only 1.6 pounds to minimize fatigue during long polishing sessions. Its smaller size offers superior maneuverability, making it ideal for producing flawless sink rims and bowls with precision.
Compatible with 3″ and 4″ discs, as well as 2″, 3″, and 4″ rubber pads, the Alpha AIR-300/304 delivers versatility for various tasks. It operates with a 3HP compressor, requiring 10 CFM air consumption and air pressure between 85–95 PSI. Designed for both in-shop and on-site use, this polisher transitions effortlessly between environments, making it an essential tool for every stone fabricator seeking power, control, and professional-quality results.
AIR-300/304 Pneumatic Polisher Main Features
- High-Performance, Pneumatic Polishing Tool with A Central Water-Feed System
- No-Load 5,800 RPMs
- Lightweight and Ergonomically Design Reduces Fatigue
- Designed To Easily Maneuver in Small Areas Like Sink Rims and Bowls
- Consumes 10 CFM and Requires 87 PSI
- Only Requires 3 HP Compressor
- Great in The Shop or At The Jobsite
- One Year Tool Warranty*
Alpha AIR-300/304 Pneumatic Polisher Videos
AIR-300 on Concrete Sink Bowl & Sink Rim
AIR-300/304 Pneumatic Polisher Specifications
| Feature | Value |
|---|---|
| Model | AIR-300 / AIR-304 |
| Air Pressure | 87 PSI (0.6Mpa (6 bar)) |
| Air Consumption | 10 CFM (280L/Min) |
| No Load Speed | 5,800 RPM |
| Weight | 1.6 lbs (0.731 kgs) |
| Air Inlet | 1/4” BSPT |
| Water Inlet | 1/4” BSPP |
| Spindle | 5/8”-11 / M14-2 |
| Part No. | Maximum RPM | Recommended For | Threads | Description |
|---|---|---|---|---|
| AIR-300 | 5,800 | Wet Polishing | 5/8″-11 | Mini Pneumatic Polisher |
| AIR-304 | 5,800 | Wet Polishing | M14-2 | Mini Pneumatic Polisher |
| AIR-008 | Pneumatic Tools | Rust Inhibitor Oil 8oz (237ml) |
Equipment Included
| Item | Quantity |
|---|---|
| Air Hose (10ft / 3m) | 1 |
| Water Hose (10ft / 3m) | 1 |
| Faucet/Garden Hose Adapter | 1 |
| Wrench (17mm) | 1 |
| Rust Inhibitor Oil (1oz / 30cc) (Replace with: AIR-008) | 1 |
Alpha AIR-300/304 Pneumatic Polisher Related Documents
| Document Type | Link |
|---|---|
| Safety Data Sheet | Rust Inhibitor Oil for Pneumatic Tools |
| Manual | AIR-300 |
| Manual | AIR-300 v1 |
| Manual | AIR-300 Manual v0120 |
| Reference | AIR-300_HelpfulHints |
| Maint Card | Air-Tool-Maintenance |
| Parts-Schematic | AIR-300 Parts/Schematic v2 |
| Parts-Schematic | AIR-300 Parts/Schematic v1 |
| Flyer | AIR-300 flyer |
| Other | Warranty Information |
Additional Information
| PartNo | UPC Code | Pkg. Weight (lbs) | Package Dimensions | Commodity Code | Country Of Origin |
|---|---|---|---|---|---|
| AIR-300 | 749173430053 | 3.60 | 10in x 8.5in x 5.25in | 8467.11.5090 | Japan |
| AIR-304 | 749173430152 | 3.60 | 10in x 8.5in x 5.25in | 8467.11.5090 | Japan |
| AIR-008 | 749173430022 | 0.54 | 7in x 2.5in x 2.5in | 2710.19.4000 | USA |
Frequently Asked Questions
What applications is the Alpha® AIR-300 recommended for?
The Alpha® AIR-300 is recommended for wet sanding and polishing only. For wet core drilling, profiling and grinding applications, we recommend AIR-680 that offers more torque.
What is the warranty for this AIR-300?
Alpha® warrants the AIR-300 against defects in material and workmanship for a period of 90 days from the date of original retail purchase (proof of purchase is required for all warranty repairs). Customers are asked to send in the warranty cards, however, we still need proof of purchase for warranty repairs. Our obligation assumed under this warranty is limited to the repair or replacement of parts without charge of problems caused by defects in material and/or workmanship. The warranty does not apply to tool accessories. The warranty for repairs is 30 days on the parts and labor that were repaired.
Does the AIR-300 have a maintenance program?
Alpha® recommends greasing the tool housing periodically to keep your tool running. Failure to perform greasing, may reduce the life of the gears. Jiffy Lubber (Part No. 300047) and Grease (Part No. 300048) are available on website www.alpha-tools.com.
How can I get the parts list and schematic for the AIR-300?
There are several ways to obtain information such as this from Alpha®. It is available on website www.alpha-tools.com and you can purchase Alpha® genuine parts from the same web site. You can also contact customer service or tool repair departments at 800-648-7229.
If my AIR-300 breaks down, whom should I contact for repair?
Please contact Alpha® for information or send tool to your nearest repair center. For warranty repairs, please include a copy if the sales receipt. Visit our website for a list of repair centers.
What size air nipples are recommended for use on the AIR-300?
The thread on the endcase for the air on the AIR-300 is metric or 1/4” BSPP; this is a parallel pipe thread that seals on the flat seat of the fitting.
What shall I do if my AIR-300 breaks down and I need to complete the job immediately?
This largely depends upon the time frame involved. Alpha® is the only warranty repair service center for tools still under warranty. Tools sent in for warranty repair with a copy of the sales receipt; receive priority same day or next day repair service. Tools sent in that are out of warranty will be estimated and a quote will be sent. Upon approval, repairs usual ship 7 to 10 days after approval. A $30.00 estimate fee per tool for non-warranty tools will be applied. If the tool is repaired, the $30.00 estimate fee will be applied toward the labor charge. Any parts used in the repair will be an additional charge. Please contact our tool repair department for alternative solutions.
Can I use motor oil to lubricate the AIR-300? How about WD40?
No. You can not use motor oil for lubrication. The AIR-300 requires special lightweight pneumatic oil for maintenance. These types of lubricants can cause the vanes to stick in the rotor. We recommend Alpha® Lubrication Oil for Pneumatic Tools (Part No. AIR-008). You can purchase genuine Alpha® parts from our website www.alpha-tools.com.
Can I use my AIR-300 for dry polishing applications?
Yes. The AIR-300 can be used for dry polishing applications. Use only dry polishing abrasives such as Ceramica DRY, PVA Quick Change, Sandpaper or other dry polishing pads that can be used under 4,000 loaded RPM.
What is the largest diameter accessory that the AIR-300 will accept?
The AIR-300 will accept accessories up to 4". Do not attempt to use accessories larger than 4" for safety reasons. In addition, large accessories require more torque than the AIR-300 can provide. Operating the AIR-300 under these conditions will result in an overheating failure.
Can I use the AIR-300 for drilling applications such as faucet holes?
No. We recommend that you use AIR-680 with C-Handle attachment that is available as an optional part and a template in order to use Alpha® Core Bits to drill faucet mounting holes.
Can I use an automatic oil feeder in the air supply line?
No. The volume, grade, and composition of oil used may cause premature failure. The AIR-300 does not require much oil so a few drops a day at the end of operations should be enough for maintenance. We recommend inserting 2 -3 drops of Pneumatic Oil in the air line and running the AIR-300 for about 1minute on a daily basis at the end of your work shift.
How much horsepower should my compressor have to operate one air polisher?
The airflow needs to run at 10 CFM in order to run one air polisher. Therefore, you will need a minimum of 3HP per tool efficiently operate the AIR-300. A 3HP compressor is highly recommended as the minimum requirement for one AIR-300. If a second polisher is added or planned for future growth, the air flow requirement increases 10 CFM per tool and the horsepower increases 3HP per tool.
Can I use my AIR-300 as a wet cutting tool with a diamond blade?
No. The AIR-300 has only 5,800 rpm at no load. This is not enough rpm for diamond blade cutting applications. It is also unsafe to use as a cutting tool. Do not attempt to cut with the AIR-300. Operating the tool at a pressure that exceeds the recommended operating specifications (85-90 PSI) may result in premature failure of the tool.
What is the RPM of the Alpha® AIR-300?
The Alpha® AIR-300 has a no load RPM of 5,800, the RPM of a pneumatic tool will drop to the optimum polishing speed of 3,500 to 4,500 RPM under load. Do not attempt to increase RPM by increasing PSI due the operating the tool at a pressure that exceeds the recommended operating specifications (85-90 PSI) as this may result in premature failure of the tool.
How many gallons of water does the Alpha® AIR-300 use per minute?
The AIR-300 uses 0.5 gallons of water per minute if the needle valve is fully opened.
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