Alpha Tools Variable Speed Wet Polisher - VSP-320

Alpha Tools Variable Speed Wet Polisher - VSP-320

Alpha has replaced the VSP-120 with the newly designed VSP-320. Although the general appearance of the machines is similar, we have overhauled these models to make them durable and dependable tools. The major upgrade came in the form of heavy-duty gear systems, including the step-down transmission and a bevel and pinion gear to produce the variable speed range of 700 to 2,500 rpm. Thanks to the high-tech machine center, we have all parts precision-machined to reduce noise and vibration during the application. This upgrade ensures a long-lasting tool life and a comfortable application.

Features

• The spindle is now specially coated to reduce friction and extend the life of the oil seals
• The water hose is now very flexible and kink-free
• The electrical power cord has an in-line GFCI
• Hose lengths are now 15 ft. and are bundled by 3 ft. of an EasyOn-EasyOff sleeve that improves the maneuverability of the polisher
• Adjustable splash guard and ventilation cap minimize water getting inside the motor housing - exclusive to Alpha Tools
• Comes with a standard C-Handle for torque-oriented applications such as Profiling and Core Drilling and a standard Side Handle for general edge polishing applications

Specifications      

Included

• Alpha VSP-320 Variable Speed Polisher
• Ground Fault Circuit Interrupter
• Water Valve and Flexible Hose
• Faucet/Garden Hose Adapter
• Wrench
• C-Handle
• Side Handle (reversible)
• Extra Carbon Brush Set
• Ventilation Cap
• Splash Guard
• EasyOn-EasyOff Sleeve
• Operator's Manual

What our Experts Think

• Professional stone fabrication polisher: The Alpha VSP-320 is a variable speed wet polisher designed for granite, marble, quartz, and engineered stone finishing work
• Precision speed control: Adjustable range of 700–2,500 RPM allows controlled polishing from aggressive material removal to fine finishing
• Wet polishing system: Integrated water feed helps reduce dust, cool the pad, and improve surface finish quality during edge and countertop work
• Lightweight, ergonomic design: Around 7.3 lbs with balanced handling for extended use on vertical edges and tight fabrication areas
• Jobsite-ready safety features: Includes inline GFCI protection, splash guard, and flexible water hose system for safer on-site operation
• Versatile fabrication use: Commonly used for edge polishing, seam finishing, sink cutouts, and stone restoration work
• Professional-grade build: Designed for daily shop and field use with durable internal gearing for consistent torque under load

Q&A

Q: What is the Alpha Tools VSP-320?
A: It is a professional variable-speed wet polisher designed for polishing, shaping, and finishing stone surfaces like granite, marble, quartz, and engineered stone.

Q: What is the speed range of the VSP-320?
A: It offers a variable speed range of approximately 700–2,500 RPM for controlled polishing and edge finishing.

Q: What materials can it be used on?
A: It is designed for stone fabrication applications including granite, marble, quartz, engineered stone, and solid surface materials.

Q: Is it a wet or dry polisher?
A: It is a wet polisher that uses a water feed system to reduce dust, control heat, and improve finish quality.

Q: What is the motor power?
A: It uses an 800W (7A) motor built for continuous professional use in fabrication shops and job sites.

Q: What size polishing pads does it use?
A: It is compatible with 4-inch (100 mm) polishing pads with a 5/8"-11 spindle thread.

Q: Does it help reduce dust and overheating?
A: Yes, the wet system continuously cools the surface and suppresses dust, improving safety and finish quality.

Q: What makes it better than a standard grinder?
A: Unlike grinders, it is designed for controlled low-speed polishing, reducing burn marks and improving surface finishing quality.

Q: Is it suitable for professional use?
A: Yes, it is widely used by stone fabricators, countertop installers, and construction professionals for precision finishing work.

Maintenance Tips

• Always use clean, filtered water to prevent clogging in the internal water line.
• Avoid running the polisher dry, as it increases pad wear and motor heat.
• Check carbon brushes periodically and replace when worn to maintain motor efficiency.
• Let the tool run briefly after use with water off to clear internal moisture.
• Do not overload pressure—use light, even hand pressure for longer tool life and better finish quality.
• Clean backing pad threads regularly to prevent pad slippage or imbalance.
• Inspect bearings for unusual noise or vibration and service early to avoid costly repairs.
• Disconnect power before any cleaning, pad change, or inspection for safety compliance.
• Use only compatible wet polishing pads designed for variable speed grinders.
• Store with hose detached and coiled loosely to avoid kinks and water flow restriction.