Stone fabricator using Samurai pneumatic wet polisher on granite countertop edge

Wet Stone Grinders for Production Stone Shops

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Samurai's wet stone grinders are pneumatic tools built for the material removal stage of granite, quartz, and marble fabrication, not a shop-made stopgap. The Samurai ST-358 runs a 570W motor at 10,000 RPM with a center water feed and rear exhaust, so cooling water stays exactly where the diamond meets stone and exhaust air stays out of your line of sight. Every unit ships with hoses, ready to run. Once the shape is right, move to a wet stone polisher for the finish. Need parts? Replacement parts are stocked and available directly through us.

 

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  • Samurai ST-358 pneumatic wet stone grinder with center water feed and side exhaust
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    Samurai ST-358 | Wet Stone Grinder with Hoses

    Samurai ST-358 | Wet Stone Grinder with Hoses
    $406.29 USD $482.00 USD

Frequently Asked Questions

+What's the difference between a stone grinder and a stone polisher?

The grinder handles material removal, edge shaping, cutouts, and seam leveling before the surface is ready for polish. The polisher takes it from there through the grit progression to a finished gloss. Most shops run both.

+What RPM does a wet stone grinder need to run at?

10,000 RPM is the sweet spot for cutting granite, quartz, and engineered stone without bogging down. The ST-358 runs a 570W motor at exactly that speed.

+What size diamond cup wheel fits these grinders?

Up to 5 inches in diameter, on a 5/8-11 arbor, the standard thread for U.S. stone fabrication tooling.

+Why choose pneumatic over electric for wet grinding?

Pneumatic tools don't overheat under continuous load in a wet environment and run lighter in the hand, which matters over a full shift of edge work. Electric options can shut down mid-run when they get hot.

+Does a center water feed matter?

Yes. It delivers cooling water right where the diamond contacts the stone, which is more consistent than running an external hose and keeps your cut cleaner.

+Are replacement parts available for the ST-358?

Yes, stocked and available directly through us, so you can service the tool instead of replacing it.