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Alpha AIR-300 / AIR-304 Pneumatic Polishers
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At a Glance
Quick Decision Guide
Maximum Speed
5,800 RPM
Spindle Thread
5/8"-11
Polishing Type
Wet Polishing
Disc Compatibility
3" & 4"
Rubber Pad Compatibility
2", 3" & 4"
Air Consumption
10 CFM
Air Pressure
87 PSI
Tool Weight
1.6 lbs
Why Choose This Product
Key Benefits
Compact Maneuverability
Reaches sink rims, bowls and confined polishing areas
Central Water Feed
Supplies water directly to the polishing area for wet polishing
Lightweight Handling
1.6 lb body reduces fatigue during extended use
Accessory Flexibility
Accepts 3" and 4" discs plus 2", 3" and 4" rubber pads
Pneumatic Performance
Operates at 5,800 RPM with 10 CFM air consumption
Shop & Jobsite Use
Compact pneumatic design transitions between fabrication shop and field work
Product Information
Product Details
Specifications
Brand
Alpha®
Part Number
AIR-300
UPC
749173430053
Product Type
Mini Pneumatic Polisher
Recommended Use
Wet Polishing
Spindle Thread
5/8"-11
Maximum No-Load Speed
5,800 RPM
Central Water Feed
Yes
Disc Compatibility
3" & 4"
Rubber Pad Compatibility
2", 3" & 4"
Air Pressure
87 PSI (0.6 MPa / 6 bar)
Air Consumption
10 CFM (280 L/min)
Required Compressor
3 HP
Air Inlet
1/4" BSPT
Water Inlet
1/4" BSPP
Weight
1.6 lbs (0.731 kg)
Primary Applications
Sink Rims, Bowls & Confined Polishing Areas
Use Environment
Shop & Jobsite
Included Air/Water Hose
30 ft (9.1 m) Twin Hose Assembly
Included Adapter
Faucet/Garden Hose Adapter
Included Wrench
17 mm
Included Oil
1 oz (30 cc) Rust Inhibitor Oil
Included Storage
Reusable Stackable Toolbox
Tool Warranty
1 Year
About This Product
Compact Pneumatic Polisher for Sink Rims and Bowls
The Alpha® AIR-300 / AIR-304 Pneumatic Polishers are compact wet polishing tools built for areas that are difficult to access with conventional polishers. The smaller body is easy to maneuver around sink rims, bowls, and other confined fabrication areas, while the 1.6 lb design reduces fatigue during extended polishing work.
5,800 RPM Wet Polishing with Central Water Feed
A central water-feed system supplies water directly to the polishing area for wet polishing applications. Both models operate at a maximum no-load speed of 5,800 RPM and accept 3" and 4" polishing discs along with 2", 3", and 4" rubber pads, providing flexibility for detailed stone fabrication and polishing work.
Air Requirements for Shop and Jobsite Use
The polishers consume 10 CFM at 87 PSI and require a 3 HP air compressor. A 1/4" BSPT air inlet and 1/4" BSPP water inlet support the pneumatic and water connections, while the compact format makes the tool suitable for both fabrication shops and on-site work.
AIR-300 and AIR-304 Spindle Options
The AIR-300 uses a 5/8"-11 spindle, while the AIR-304 uses an M14-2 spindle, allowing fabricators to select the model that matches their polishing accessories. Each polisher includes a 30 ft air/water twin hose assembly, faucet/garden hose adapter, 17 mm wrench, rust inhibitor oil, and reusable stackable toolbox.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What is the difference between the AIR-300 and AIR-304?
The spindle thread is the primary difference. The AIR-300 uses a 5/8"-11 spindle, while the AIR-304 uses an M14-2 spindle. Both models have the same 5,800 RPM maximum speed, air requirements, weight, and polishing capabilities.
What size polishing discs can the AIR-300 and AIR-304 use?
Both models accept 3" and 4" polishing discs and can be used with 2", 3", and 4" rubber pads.
What air compressor is required for these pneumatic polishers?
The polishers require a 3 HP compressor and consume 10 CFM at an operating pressure of 87 PSI.
Do the AIR-300 and AIR-304 have a water-feed system?
Yes. Both models feature a central water-feed system for wet polishing applications.
What applications are these mini pneumatic polishers best suited for?
The compact design is suited for polishing sink rims, bowls, and other confined areas that can be difficult to access with larger conventional polishers.
What comes with the Alpha mini pneumatic polisher?
Each polisher includes a 30 ft air/water twin hose assembly, faucet/garden hose adapter, 17 mm wrench, 1 oz of rust inhibitor oil, and a reusable stackable toolbox.