Alpha Tools Mini Air Wet Polisher - AIR-300

Alpha Tools Mini Air Wet Polisher - AIR-300

They are designed to be used in tight corners and for bowl polishing. Works with 3HP compressor. Only weighs 1.6 lbs. (AIR-658 weighs 2.54 lbs)

Features

• Introducing the Alpha AIR-300, designed for unique applications that are difficult to accomplish using conventional polishers
• A smaller version of the well-known Alpha AIR-658, the AIR-300 is ergonomically designed to fit comfortably in your hand and only weighs 1.6 pounds, reducing fatigue from long hours of polishing
• The smaller design is easy to maneuver and produces flawless sink rims and bowls
• Requires a 3HP compressor with air consumption of 10 CFM and air pressure between 85–95 PSI
• It easily converts from in-shop to on-site; it is a must-have for all fabricators!
• Shop workers easily use this tool with little or no fatigue
• It has a centrally fed water distribution system that provides the best finishes possible
• Includes the side handle, a splash guard, pneumatic lubrication oil, and the hoses for air, water, and exhaust, along with the appropriate fittings
• Recommended for wet sanding and polishing only. For wet core drilling, profiling, and grinding applications, we recommend AIR-658, which offers more torque
• Air Inlet 1/4” Npt
• Air lead hose - 10 feet (3m)
• Water Inlet G 1/4 (PS 1/4)
• Accept" s 3" a" d 4" discs along wi "h 2" a" d 3" rubber pads
• Exhaust Muffler
• Side handle (reversible)
• Hose adapter with Water valve with hose Wrenches / Splash Guard
• Requirements for this tool are a cast iron 2-stage compressor with a tank, 3 hp for each tool
• Alpha AIR-300 is perfect for concrete counter-top fabrication

Specifications    

What our Experts Think

• Ultra-compact precision polisher: The Alpha AIR-300 Mini Air Wet Polisher is a pneumatic (air-powered) detailing tool designed for tight, high-precision stone finishing work such as sink rims, bowls, and edges
• Wet polishing system: Built-in central water-feed design helps control dust and improve finish quality while polishing granite, marble, quartz, and engineered stone
• High-speed controlled performance: Runs at approximately 5,800 RPM (no-load) with strong consistency under load for smooth finishing results
• Extreme maneuverability: At only ~1.6 lbs, it is engineered for low fatigue and precise handling in tight or curved areas
• Jobsite + shop flexibility: Compact pneumatic design makes it easy to switch between fabrication shop use and on-site finishing work
• Air-powered efficiency: Requires a standard compressor setup (around 10 CFM / 87 PSI), making it suitable for professional fabrication environments
• Detail-focused tooling: Accepts small pads (2"–4"), making it ideal for fine edge work, corners, and detailed surface blending

Q&A

Q: What is the Alpha Tools AIR-300 Mini Air Wet Polisher?
A: It is a lightweight pneumatic (air-powered) wet polisher designed for precision polishing, sanding, and finishing of stone surfaces in tight or detailed areas.

Q: What makes the AIR-300 different from electric polishers?
A: It uses compressed air instead of electricity, offering high RPM performance with low weight (about 1.6 lbs) for reduced operator fatigue and better control in detailed work.

Q: What materials can it be used on?
A: It is designed for granite, marble, quartz, engineered stone, and concrete surfaces used in countertops, sinks, and fabrication work.

Q: Is it a wet or dry tool?
A: It is primarily a wet polisher, using a central water-feed system to reduce dust and control heat during polishing.

Q: What is the speed of the AIR-300?
A: It runs at up to 5,800 RPM no-load speed, optimized for controlled polishing rather than cutting.

Q: What size pads does it use?
A: It accepts 3-inch and 4-inch polishing discs and compatible rubber backer pads for detailing work.

Q: What air compressor is required?
A: It requires about 10 CFM at 85–95 PSI and typically a minimum 3 HP air compressor for proper operation.

Q: What applications is it best for?
A: It is ideal for sink rims, bowls, edges, tight corners, and detailed stone finishing where larger polishers cannot reach.

Q: Can it be used on job sites?
A: Yes, it is designed for both shop and on-site fabrication work due to its portability and compact size.

Maintenance Tips

• Add 2–3 drops of pneumatic oil daily into the air inlet after use, then run briefly to distribute lubrication and prevent internal rust.
• Use clean, dry compressed air (≈87 PSI, 10 CFM) to avoid moisture damage and vane wear.
• Always flush the water line after use to prevent mineral buildup and clogging in the wet-feed system.
• Do not run the tool dry for long periods—wet operation reduces heat and extends pad and bearing life.
• Inspect and clean the water valve and fittings regularly to ensure steady flow control.
• Avoid excessive pressure; let the tool’s weight do the work to prevent gear strain and pad damage.
• Check and tighten the 5/8”-11 spindle and pad adapters frequently to avoid vibration or slippage.
• Keep air filters and compressors maintained to prevent oil/water contamination entering the tool.
• After use, disconnect hoses and drain water completely to avoid internal corrosion.
• Store in a dry environment, with hoses loosely coiled to prevent kinks and wear.