{"product_id":"weha-4-max-pro-pneumatic-wet-grinder-150800","title":"Weha 4\" Max Pro Pneumatic Wet Grinder - 150800","description":"\u003ch2\u003eWeha 4\" Max Pro Pneumatic Wet Grinder - 150800\u003c\/h2\u003e\n\u003cp\u003eThe Max Pro Water-Feed Air Sander\/Polisher is a heavy duty polisher designed for power. Yet, it is engineered to be operated with less fatigue. Use it for wet sanding and\/or polishing of stone surfaces made of stone. This product page covers the technical specs, the operation instructions and the care and maintenance of the Max Pro polisher.\u003c\/p\u003e\n\u003cp\u003eThis Water-Feed Air Sander\/Polisher is of heavy duty construction and extremely powerful. The side handle and head cover reduce fatigue at operation. It is great for wet sanding and polishing of marble and stone, for trim work and much more.\u003c\/p\u003e\n\u003cp\u003eFor safety reasons, it is essential to read the entire instruction manual before first operating the Max Pro and to observe all the instructions.\u003c\/p\u003e\n\u003ch5 class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/b\u003e\u003c\/h5\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003eHeavy-duty construction for durability\u003cu\u003e\u003c\/u\u003e\u003cu\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003eReduced fatigue with side handle and head cover\u003cu\u003e\u003c\/u\u003e\u003cu\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003eIdeal for wet sanding and polishing marble and stone\u003cu\u003e\u003c\/u\u003e\u003cu\u003e\u003c\/u\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003eSuitable for trim work and more\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat Our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"13c7zwb\" data-start=\"28\" data-end=\"149\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"68\"\u003eProfessional pneumatic wet grinder\u003c\/strong\u003e designed for precision stone fabrication, polishing, and finishing applications.\u003c\/li\u003e\n\u003cli data-section-id=\"1hbfkuw\" data-start=\"150\" data-end=\"249\"\u003e\n\u003cstrong data-start=\"152\" data-end=\"176\"\u003e4-inch tool capacity\u003c\/strong\u003e provides excellent control for detailed edge work and surface finishing.\u003c\/li\u003e\n\u003cli data-section-id=\"8am8f\" data-start=\"250\" data-end=\"363\"\u003e\n\u003cstrong data-start=\"252\" data-end=\"278\"\u003eWet grinding operation\u003c\/strong\u003e helps reduce dust while keeping tooling cool for improved performance and longevity.\u003c\/li\u003e\n\u003cli data-section-id=\"1sd4vwx\" data-start=\"364\" data-end=\"473\"\u003e\n\u003cstrong data-start=\"366\" data-end=\"388\"\u003eAir-powered design\u003c\/strong\u003e delivers consistent power without the risk of motor overheating during extended use.\u003c\/li\u003e\n\u003cli data-section-id=\"fm2g1h\" data-start=\"474\" data-end=\"565\"\u003e\n\u003cstrong data-start=\"476\" data-end=\"518\"\u003eLightweight and ergonomic construction\u003c\/strong\u003e enhances operator comfort and reduces fatigue.\u003c\/li\u003e\n\u003cli data-section-id=\"audgzy\" data-start=\"566\" data-end=\"647\"\u003e\u003cstrong data-start=\"568\" data-end=\"647\"\u003eIdeal for polishing, shaping, smoothing, and edge-finishing stone surfaces.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1t4dl4b\" data-start=\"648\" data-end=\"734\"\u003e\u003cstrong data-start=\"650\" data-end=\"734\"\u003eSuitable for granite, marble, quartz, porcelain, and engineered stone materials.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1gsjqxe\" data-start=\"735\" data-end=\"832\"\u003e\n\u003cstrong data-start=\"737\" data-end=\"785\"\u003eBuilt for demanding fabrication environments\u003c\/strong\u003e where reliability and precision are essential.\u003c\/li\u003e\n\u003cli data-section-id=\"11z5iw4\" data-start=\"833\" data-end=\"924\"\u003e\n\u003cstrong data-start=\"835\" data-end=\"877\"\u003eSupports professional-quality finishes\u003c\/strong\u003e with excellent control and consistent results.\u003c\/li\u003e\n\u003cli data-section-id=\"1icw85u\" data-start=\"925\" data-end=\"1165\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"927\" data-end=\"946\"\u003eExpert Verdict:\u003c\/strong\u003e The Weha 4\" Max Pro Pneumatic Wet Grinder is a durable, high-performance fabrication tool that combines precision, operator comfort, and reliable wet-processing capabilities for professional stone-working applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a2c1784-3750-83ee-acab-953407104ecd-10\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a2c1784-3750-83ee-acab-953407104ecd-10\" data-turn-id-container=\"request-6a2c1784-3750-83ee-acab-953407104ecd-10\" data-testid=\"conversation-turn-168\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"c6cc2b51-4831-4982-b4fc-82d6b506ad60\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"81\" data-end=\"409\"\u003e\u003cstrong data-start=\"81\" data-end=\"147\"\u003eQ: What is the Weha 4\" Max Pro Pneumatic Wet Grinder used for?\u003c\/strong\u003e\u003cbr data-start=\"147\" data-end=\"150\"\u003eA: The Max Pro is a professional \u003cstrong data-start=\"183\" data-end=\"223\"\u003eair-powered wet grinder and polisher\u003c\/strong\u003e designed for polishing, sanding, edge finishing, and stone fabrication applications. It is ideal for granite, marble, quartz, and engineered stone. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"411\" data-end=\"610\"\u003e\u003cstrong data-start=\"411\" data-end=\"457\"\u003eQ: Is the Max Pro air-powered or electric?\u003c\/strong\u003e\u003cbr data-start=\"457\" data-end=\"460\"\u003eA: The Max Pro is a \u003cstrong data-start=\"480\" data-end=\"507\"\u003epneumatic (air-powered)\u003c\/strong\u003e tool that operates using compressed air rather than electricity. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"612\" data-end=\"836\"\u003e\u003cstrong data-start=\"612\" data-end=\"656\"\u003eQ: What size polishing pads does it use?\u003c\/strong\u003e\u003cbr data-start=\"656\" data-end=\"659\"\u003eA: The grinder is designed for \u003cstrong data-start=\"690\" data-end=\"733\"\u003e4-inch polishing pads and sanding discs\u003c\/strong\u003e, making it suitable for detailed fabrication and finishing work. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"838\" data-end=\"1055\"\u003e\u003cstrong data-start=\"838\" data-end=\"887\"\u003eQ: Does the tool include a water-feed system?\u003c\/strong\u003e\u003cbr data-start=\"887\" data-end=\"890\"\u003eA: Yes. It features a \u003cstrong data-start=\"912\" data-end=\"940\"\u003ecenter water-feed system\u003c\/strong\u003e that helps cool the surface, reduce dust, and improve polishing performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1057\" data-end=\"1243\"\u003e\u003cstrong data-start=\"1057\" data-end=\"1100\"\u003eQ: What is the maximum operating speed?\u003c\/strong\u003e\u003cbr data-start=\"1100\" data-end=\"1103\"\u003eA: The Max Pro operates at up to \u003cstrong data-start=\"1136\" data-end=\"1149\"\u003e5,000 RPM\u003c\/strong\u003e, providing smooth and controlled polishing performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1245\" data-end=\"1419\"\u003e\u003cstrong data-start=\"1245\" data-end=\"1282\"\u003eQ: What air pressure is required?\u003c\/strong\u003e\u003cbr data-start=\"1282\" data-end=\"1285\"\u003eA: The grinder operates at \u003cstrong data-start=\"1312\" data-end=\"1322\"\u003e90 PSI\u003c\/strong\u003e and consumes approximately \u003cstrong data-start=\"1350\" data-end=\"1362\"\u003e5.75 CFM\u003c\/strong\u003e of compressed air. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1421\" data-end=\"1622\"\u003e\u003cstrong data-start=\"1421\" data-end=\"1465\"\u003eQ: What spindle thread size does it use?\u003c\/strong\u003e\u003cbr data-start=\"1465\" data-end=\"1468\"\u003eA: It features a standard \u003cstrong data-start=\"1494\" data-end=\"1520\"\u003e5\/8\"-11 spindle thread\u003c\/strong\u003e, compatible with many professional stone polishing accessories. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1624\" data-end=\"1888\"\u003e\u003cstrong data-start=\"1624\" data-end=\"1681\"\u003eQ: Is it suitable for professional fabrication shops?\u003c\/strong\u003e\u003cbr data-start=\"1681\" data-end=\"1684\"\u003eA: Yes. The Max Pro is built for professional stone fabricators, countertop manufacturers, and restoration specialists who require reliable wet polishing performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1890\" data-end=\"2122\"\u003e\u003cstrong data-start=\"1890\" data-end=\"1940\"\u003eQ: Does the tool help reduce operator fatigue?\u003c\/strong\u003e\u003cbr data-start=\"1940\" data-end=\"1943\"\u003eA: Yes. It includes a side handle, rear exhaust design, and ergonomic construction to improve control and reduce fatigue during extended use. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2124\" data-end=\"2454\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"2124\" data-end=\"2193\"\u003eQ: Why choose the Weha 4\" Max Pro Pneumatic Wet Grinder (150800)?\u003c\/strong\u003e\u003cbr data-start=\"2193\" data-end=\"2196\"\u003eA: Its \u003cstrong data-start=\"2203\" data-end=\"2321\"\u003e4-inch capacity, 5,000 RPM speed, center water-feed system, pneumatic operation, and professional-grade durability\u003c\/strong\u003e make it an excellent choice for stone polishing, edge finishing, and fabrication applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1v09ryg\" data-start=\"71\" data-end=\"189\"\u003eClean the grinder thoroughly after each use to remove stone slurry, debris, and residue that can affect performance.\u003c\/li\u003e\n\u003cli data-section-id=\"vftj4w\" data-start=\"190\" data-end=\"283\"\u003eInspect air hoses, fittings, and connections regularly for leaks, cracks, or signs of wear.\u003c\/li\u003e\n\u003cli data-section-id=\"1j9h5sz\" data-start=\"284\" data-end=\"386\"\u003eEnsure a consistent water supply during operation to cool the tool and reduce wear on grinding pads.\u003c\/li\u003e\n\u003cli data-section-id=\"n0y7j\" data-start=\"387\" data-end=\"483\"\u003eCheck grinding pads and backing pads frequently for wear or damage and replace them as needed.\u003c\/li\u003e\n\u003cli data-section-id=\"4h6gl7\" data-start=\"484\" data-end=\"600\"\u003eLubricate the air motor with the recommended pneumatic tool oil to maintain smooth operation and extend tool life.\u003c\/li\u003e\n\u003cli data-section-id=\"1skreep\" data-start=\"601\" data-end=\"682\"\u003eKeep air and water passages clear of blockages to ensure efficient performance.\u003c\/li\u003e\n\u003cli data-section-id=\"ytxpcf\" data-start=\"683\" data-end=\"794\"\u003eStore the grinder in a clean, dry environment when not in use to protect pneumatic components from corrosion.\u003c\/li\u003e\n\u003cli data-section-id=\"q1ktgt\" data-start=\"795\" data-end=\"916\" data-is-last-node=\"\"\u003ePerform routine inspections and preventive maintenance to maximize safety, grinding efficiency, and equipment lifespan.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Weha","offers":[{"title":"Default Title","offer_id":45730236793023,"sku":"150800","price":419.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/4-max-pro-pneumatic-wet-grinder-301298.png?v=1781546117","url":"https:\/\/backyardprovider.com\/products\/weha-4-max-pro-pneumatic-wet-grinder-150800","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}