Alpha AIR-300 Mini Pneumatic Polisher

The Alpha AIR-300 Mini Pneumatic Polisher is a compact wet air polisher designed for detailed stone polishing in tight or confined areas. It is ideal for working around sink cutouts, sink bowls, inside corners, curved edges and other areas that are difficult to reach with a full-size polishing tool.

As the compact version of the Alpha AIR-658, the AIR-300 weighs only 1.6 lbs. Its lightweight design provides excellent maneuverability and control while helping reduce operator fatigue during extended polishing work in the fabrication shop or on the jobsite.

A central water-feed system delivers water directly to the polishing surface to help keep polishing pads cool, minimize swirl marks and produce clean finishes. The Alpha AIR-300 is compatible with standard 3-inch and 4-inch polishing discs and 2-inch, 3-inch and 4-inch back-up pads.

Typical Applications

• Sink rim polishing
• Sink bowl polishing
• Inside corner polishing
• Faucet hole finishing
• Curved edge polishing
• Countertop touch-up work
• On-site countertop installation
• Stone fabrication shop finishing

Advantages

• Compact, high-performance pneumatic wet polisher
• Designed for tight spaces and detailed polishing applications
• Integrated central water-feed system
• No-load speed of 5,800 RPM
• Lightweight 1.6 lb. design helps reduce operator fatigue
• Excellent maneuverability around sink rims, bowls and inside corners
• Consumes only 10 CFM
• Operates within an 85–95 PSI pressure range
• Requires a minimum 3 HP air compressor
• Standard 5/8-inch-11 spindle fits common back-up pads
• Suitable for fabrication shop and field installation work
• Backed by a one-year warranty; see the owner's manual for complete details

Specifications

• Manufacturer: Alpha Professional Tools
• Model: AIR-300
• No-load speed: 5,800 RPM
• Weight: 1.6 lbs.
• Air consumption: 10 CFM
• Operating pressure: 85–95 PSI
• Recommended operating pressure: Approximately 87 PSI
• Minimum air compressor: 3 HP
• Thread size: 5/8-inch-11
• Compatible polishing discs: 3-inch and 4-inch
• Compatible back-up pads: 2-inch, 3-inch and 4-inch
• Water delivery: Central water-feed system

Compatible Materials

• Granite
• Quartz
• Marble
• Quartzite
• Engineered stone
• Natural stone countertops

Why Choose the Alpha AIR-300 Mini Pneumatic Polisher?

The Alpha AIR-300 provides professional stone fabricators with the control needed to polish areas where full-size pneumatic polishers cannot easily reach. Its compact body, lightweight construction and central water-feed system make it a practical choice for detailed wet-polishing applications in the shop or during countertop installation.

Compatibility with standard polishing discs, back-up pads and a 5/8-inch-11 spindle allows the AIR-300 to integrate easily with common stone-polishing accessories.

Browse our complete selection of air polishers, including the larger Alpha AIR-830 for polishing larger flat surfaces. Pair the AIR-300 with professional back-up pads for your stone-polishing applications.

Frequently Asked Questions

What is the Alpha AIR-300 designed for?

The AIR-300 is designed for polishing sink rims, sink bowls, faucet holes, inside corners, curved edges and other confined areas where larger polishing tools are difficult to use.

What polishing accessories are compatible with the AIR-300?

It accepts standard 3-inch and 4-inch polishing discs and works with 2-inch, 3-inch and 4-inch back-up pads using a 5/8-inch-11 spindle thread.

What air supply does the Alpha AIR-300 require?

The tool consumes 10 CFM, operates within an 85–95 PSI pressure range and requires a minimum 3 HP air compressor.

Which materials can be polished with the AIR-300?

The AIR-300 can be used to polish granite, quartz, marble, quartzite, engineered stone and natural stone countertops.

How does the central water-feed system help during polishing?

The system delivers water directly to the polishing surface to help keep the polishing pad cool, minimize swirl marks and produce clean finishes.

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