PSG-658 Pneumatic Grinder

Alpha® is pleased to introduce the PSG-658 Pneumatic Grinder with a 5/8”-11 spindle. This newly developed high-performance wet pneumatic stone grinder will become an essential part of the stone fabrication shop. The PSG-658 comes with a very unique center water-feed system to deliver ample water to keep the dust down on the floor and also enhance the performance of the wheel. It is smaller and lighter than electric angle grinders and offers better maneuverability along with all the safety features. It is common knowledge that electric power tools do not last very long due to the stone dust or the water splash which damages them easily. This is why most of the polishers nowadays are pneumatic-driven polishers. The Alpha® PSG-658 is a turn-key operation that comes with 15 ft. all-weather hoses and a convenient water quick coupler with shut off valve. In addition, the end case is made with a composite material to prevent freezing which is a common issue for hands, by the rear exhaust system, in consideration of operator comfort.

Question : I have a large enough compressor but PSG-658 bogs down from time-to-time. What can I do to improve the operation?

Answer : You may have multiple pieces of equipment connected to the compressed airline, so you may be short on the amount of air flow available from your compressor.

Question : What is different between wet grinders on the market and the Alpha® PSG-658?

Answer : Most of wet grinders have been built with an alteration of common pneumatic high-speed angle grinders designed for dry metal applications with exterior water feeds. The PSG-658 is designed from scratch as an industrial wet grinding tool for stone industries. With this said, the Alpha® wet grinder is built with more than 30 years of experience producing wet polishers along with feedback from stone fabricators.

Question : Can I use PSG-658 for cutting application?

Answer : Yes. Alpha® recommends using a cutting blade with HydroQuad™ Adapter that distributes water on the both sides of blade effectively. You can find the HydroQuard™ at many Alpha® authorized dealers.

Question : What is the warranty on the PSG-658?

Answer : One year warranty.

Question : How can I get the parts list and schematic for the PSG-658?

Answer : Visit our website at www.alpha-tools.com or call at 800-648-7229.

Question : Can I use PSG-658 as a dry cutter?

Answer : Yes you can. Alpha® recommends the Ecoguard W5 or W6 to replace the steel safety guard so that you can connect to a HEPA vacuum to collect dangerous silica dust from the cutting edge in accordance with Table 1 of OSHA silica rule. https://www.alpha-tools.com/Pages/ProductDetails.aspx?PageCode=1670

Question : Does Alpha® offer a electric high-speed angle grinder with center water feed system?

Answer : No. However, Alpha® offers a WSPKIT to convert most popular small and large high speed grinders into a wet tool for cutting, grinding and profiling applications. https://www.alpha-tools.com/Pages/ProductDetails.aspx?PageCode=2650

Question : How much rust inhibitor oil do I need to put in the oil port?

Answer : Alpha® suggests to put only a few drops of rust inhibitor oil in the oil port at the end of the shift then slowly turn on the air to lubricate the rotor and cylinder. If you blow compressed air in full, rust inhibitor oil will come out from the exhaust which would defeat the purpose.

Question : Which product does Alpha® recommend for sanding and grinding?

Answer : Alpha® recommends using a 5” Vexcel Rigid Disc 25 grit (VDR5025) for heavy grinding applications and a 35 grit (VDR5035) for general shaping applications. We also recommend a 5” Spike Disc 35 grit (VCS5035) for resin net removal from the back sides of stones. In both cases, you can enjoy fast material removal with much less noise and vibration as compared with sintered bond grinding wheels.

Question : Does Alpha® offer any flexible discs to complete profiling on a round over edge?

Answer : Alpha® recommends a 5” VFlex Flexible Sanding Disc (VDF50xx series) to shape up the profile of round over edges or to clean up the internal oval rim of a vanity. Select from 35 grit, 50 grit or 80 grit to complete this task.