The Industry Standard Pneumatic Wet Polisher for Stone Fabrication
Trusted by professional fabricators nationwide. Built in Japan. Engineered for uptime, durability, and long-term performance in real shops.
✦ Made in Japan ✦ 1-Year Manufacturer Warranty ✦ Parts & Repairs Readily Available
Wholesale inquiries and dealer pricing available. Contact us below.
Every feature was designed for the stone shop floor — not a brochure.
Made in Japan
Precision-engineered components built to Japanese manufacturing standards. No shortcuts.
1-Year Manufacturer Warranty
Every tool ships with a full one-year warranty against manufacturer defects.
Brass Lubrication Port
Easy-access brass lube port keeps maintenance fast and your tool running clean — no excuses for skipping it.
Ambidextrous Adjustable Handle
Flip it for right or left-hand grip. Comfortable through a full shift, not just the first hour.
Standard Fittings — No Adapters Needed
Compatible with standard pneumatic and water fittings found in any shop. Plug in and get to work.
Parts Always Available
Replacement parts are stocked and available. When something needs service, you're not waiting weeks for a piece.
Built for the Stone Industry
Designed specifically for granite polishing, countertop fabrication, and stone work — not repurposed from another application.
Reduced Downtime
Easier maintenance means fewer unexpected stops. More time working, less time troubleshooting.
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The ST-235 is the most replicated wet polisher in the stone fabrication market — and there's a reason every competitor tries to copy it. Built in Japan with the kind of fit and finish you feel the moment you pick it up, the ST-235 delivers consistent RPM, easy maintenance, and a comfortable grip shift after shift. It's not the cheapest option in the market. It's the right one.
Countertop fabrication shops, granite installers, stone restoration professionals, and anyone who needs a reliable daily-driver wet polisher.
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When you need to remove material fast, the ST-358 doesn't negotiate. This rear-exhaust wet grinder was built for the demands of stone cutting and aggressive grinding work — the jobs where a polisher won't cut it. Same Japanese craftsmanship as the ST-235. More power where you need it.
Rough grinding, edge profiling, aggressive material removal, seam preparation, and heavy fabrication work on granite, quartz, marble, and engineered stone.
Both tools are Made in Japan. Here's how to pick the right one for the job.
| Feature | ST-235 Wet Polisher Most Popular | ST-358 Wet Grinder |
|---|---|---|
| Primary Use | Wet polishing, finishing, surface refinement | Wet grinding, aggressive material removal, edge work |
| Speed | 5,000 RPM | 10,000 RPM |
| Speed | — | 570W |
| Speed | 16 CFM | 16 CFM |
| Operating Pressure | 90 PSI | 90 PSI |
| Arbor / Disc Mount | Standard polishing pad backer | 5/8-11 arbor |
| Max Disc Size | Standard polishing pads | 5" |
| Exhaust Design | Standard | Rear exhaust |
| Handle | Adjustable, ambidextrous | Adjustable, ambidextrous |
| On/Off Control | Twist knob | Twist knob |
| Lube Port | Brass easy-access port | — |
| Warranty | 1 Year | 1 Year |
| Made In | Japan | Japan |
| Best For | Daily polishing, countertop finishing, surface work | Grinding, profiling, heavy material removal |
| Recommended For | Fabricators who polish daily | Fabricators needing grinding capability |
Whether you're outfitting one shop or placing a wholesale order, we'll get back to you fast with accurate pricing and availability.
Parts & Repairs Available
1-Year Manufacturer Warranty
Authorized Dealer Network
Professional-Grade Pneumatic Tools
The Samurai ST-235 is widely regarded as the industry standard pneumatic wet polisher for granite and stone work. It delivers consistent 5,000 RPM performance, is built in Japan to tight tolerances, and has an extensive parts and service network. It's the most copied wet polisher in the stone market for a reason.
The ST-235 operates at 90 PSI with an air consumption of 16 CFM. This is compatible with most standard shop compressor setups. If you're running the ST-235 alongside other pneumatic tools, make sure your compressor can sustain adequate CFM under load.
The ST-235 is a wet polisher designed for surface finishing, polishing passes, and countertop work. It runs at 5,000 RPM. The ST-358 is a heavy-duty wet grinder built for aggressive material removal, edge profiling, and grinding applications — it runs at 10,000 RPM with a 570W motor and accepts discs up to 5" on a 5/8-11 arbor. Many shops run both: the ST-235 for polishing and the ST-358 for grinding.
Yes. Replacement parts for both the ST-235 and ST-358 are stocked and available through Samurai Air Tools and authorized dealers including Basic Diamond, Stone Boss, and BB Industries. This is one of the primary reasons professional shops choose Samurai — when something needs service, you're not waiting.
Both tools use standard pneumatic and water fittings. No specialty adapters are required. Plug them into your existing shop setup and you're ready to run.
Both the ST-235 and ST-358 come with a 1-year manufacturer warranty against defects in materials and workmanship. Contact us or your authorized dealer if you have a warranty claim.
Samurai Air Tools are manufactured in Japan. Japanese manufacturing standards are central to why these tools deliver consistent long-term performance in high-production shop environments.
The ST-235 and ST-358 are built to run hard, require less downtime, and outlast the tools they replaced in your shop.
