{"product_id":"mirka-mr-508-5-in-pneumatic-finishing-sander-with-8-mm-orbit-mr-508","title":"Mirka MR-508 5-in. Pneumatic Finishing Sander with 8 mm Orbit (MR-508)","description":"\u003csection data-aplus\u003e\n  \u003cdetails id=\"product-features\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"features\"\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/sander.svg\" alt=\"sander\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eFast Finish Sanding\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe Mirka MR-508 5 Inch Finishing Sander uses a 5\/16 inch, 8 mm orbit for finishing work that needs a little more bite than a fine random orbital pass. It removes material faster while still staying in the finishing category.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/weight.svg\" alt=\"weight\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eBuilt to Reduce Fatigue\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003ePrecision molded composite construction keeps weight down and helps cut operator fatigue during longer sanding sessions. That matters when you are moving panel to panel or working overhead.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/vacuum-compatibility.svg\" alt=\"vacuum-compatibility\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eVacuum Conversion Ready\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe MR-Series platform can be converted to vacuum operation with the proper adapter. That gives you a cleaner work area and better dust control when the job calls for it.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-overview\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\" data-product-summary\u003e\n      \u003cp\u003eThe \u003cstrong\u003eMirka MR-508 5 Inch Finishing Sander\u003c\/strong\u003e is a pneumatic palm-grip random orbital sander built for finishing work where you want more stock removal than a very tight orbit sander can give you. This is a finishing sander designed for surface prep and finish sanding on wood, filler, composites, and similar materials when a slightly more aggressive sanding action is useful. Model Number: \u003cstrong\u003eMR-508\u003c\/strong\u003e.\u003c\/p\u003e\n      \u003cp\u003eThe key number here is the 5\/16 inch, or 8 mm, orbit. In real use, that means the tool cuts faster than a fine-orbit finish sander, so it is a good fit when you need to flatten, blend, or refine surfaces without stepping all the way up to a heavy material-removal sander. Combined with true 12,000 RPM performance, it is set up for productive sanding rather than slow polishing passes.\u003c\/p\u003e\n      \u003cp\u003eMirka built this sander with precision molded composite components, and that matters for two reasons: durability and operator comfort. The composite body helps keep overall weight low while also reducing sound compared to a heavier all-metal build. On the job, that translates into a tool that is easier to control over long stretches and less tiring when you are working across large panels, doors, cabinet parts, or repair areas.\u003c\/p\u003e\n      \u003cp\u003eThe low-profile design and palm-grip layout make the tool easy to keep flat on the work surface. That helps with control, especially during finishing passes where tipping the pad can leave swirl marks or uneven scratch patterns. Mirka also calls out a counter-balanced design matched to the backup pad size, along with premium counterweight bearings and moisture-resistant composite rotors. That is the kind of internal detail that supports smoother running and better long-term reliability in a shop environment.\u003c\/p\u003e\n      \u003cp\u003eBecause this is an air-powered sander, it is a practical choice for users already set up with compressed air. At 90 psi and 16.8 CFM average air consumption, it is aimed at serious shop use rather than light occasional duty from a small compressor. Variable speed gives you another layer of control when you need to back down for more delicate finishing work or stay at full speed for faster surface prep.\u003c\/p\u003e\n      \u003cp\u003eDust management is also part of the story. The Mirka MR-508 5 Inch Finishing Sander can be converted to vacuum operation with an external or self-generating vacuum adapter. If you are sanding filler, paint prep surfaces, wood panels, or composites, that option can make cleanup easier and help keep the abrasive cutting more consistently.\u003c\/p\u003e\n      \u003cp\u003eThis sander makes the most sense for body shops, woodworking shops, finish carpenters, cabinet installers, marine repair techs, and serious DIY users who already run air tools and want a compact 5 inch random orbital sander with a more assertive finish-sanding orbit. If you need a tool for delicate final finish work only, you may want a smaller orbit. If you want a balance of finish quality and speed, this one is right in the sweet spot.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCompact Control for Finish Work\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623121_1.jpg\" alt=\"Mirka MR-508 5 Inch Finishing Sander with 5 inch backing pad for shop sanding and surface finishing work\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThe palm-grip layout and low-profile body make this air sander easy to guide across flat surfaces without fighting the tool. That is a big advantage when you are trying to keep a uniform scratch pattern and avoid uneven pressure.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e5 inch pad size fits common finishing and prep work across panels, fillers, and wood parts\u003c\/li\u003e\n            \u003cli\u003eCounter-balanced design is matched to the backup pad size for smoother operation\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-whats-included\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tnincluded-wrapper\"\u003e\n        \u003cul\u003e\n          \u003cli\u003e(1) Mirka MR-508 Sander\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003ctable class=\"aplusspecs\"\u003e\n        \u003ctr\u003e\n          \u003cth\u003ePad Size\u003c\/th\u003e\n          \u003ctd\u003e5 in\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eOrbit Size\u003c\/th\u003e\n          \u003ctd\u003e5\/16 in (8 mm)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eNo-Load Speed\u003c\/th\u003e\n          \u003ctd\u003e12,000 RPM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003ePower Source\u003c\/th\u003e\n          \u003ctd\u003ePneumatic\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eAverage Air Consumption\u003c\/th\u003e\n          \u003ctd\u003e16.8 CFM\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003ePressure Rating\u003c\/th\u003e\n          \u003ctd\u003e90 psi\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eHandle Type\u003c\/th\u003e\n          \u003ctd\u003ePalm Grip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eNet Tool Weight\u003c\/th\u003e\n          \u003ctd\u003e2.7 lbs\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"compat-list\"\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/vacuum-compatibility.svg\" alt=\"vacuum-compatibility\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eVacuum Conversion\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eMR-Series sanders can be converted to vacuum operation with an external or self-generating vacuum adapter.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/diameter.svg\" alt=\"diameter\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eAbrasive Size\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eUses 5 inch sanding discs matched to the backup pad size.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tags\"\u003e\n        \u003cspan class=\"tag\"\u003eWoodworking\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eAutomotive\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eMarine\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eCabinet Work\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eSurface Prep\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eFinish Sanding\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tip-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\n        \u003cp class=\"tip-text\"\u003eAn 8 mm orbit cuts quicker than a fine finish orbit, so let the Mirka MR-508 5 Inch Finishing Sander do the work and keep it flat on the surface. Too much downward pressure just slows the pad and can leave a rougher pattern than you want.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-warranty\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"warranty-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/warranty.svg\" alt=\"warranty\" class=\"icon-sm\"\u003e\n        \u003cdiv class=\"warranty-text\"\u003e\n          1 year limited warranty.\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n      \u003ch3\u003eMirka MR-508 5 Inch Finishing Sander for Fast, Controlled Finish Prep\u003c\/h3\u003e\n      \u003cp\u003eThis is a smart pick for air-tool users who want a compact random orbital sander that moves faster than a fine-orbit finish sander without getting clumsy.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Body shop techs, woodworkers, cabinet shops, marine repair pros, and serious DIY users with a solid air setup.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The 8 mm orbit and 12,000 RPM speed give it a useful mix of finish quality and material removal, and the low-profile composite body is easier on your hands over longer runs.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This is an air sander, so compressor capacity matters, and vacuum capability requires the proper adapter rather than coming built in as standard.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eIs this a pneumatic or electric sander?\u003c\/strong\u003e This is a pneumatic finishing sander that runs on compressed air.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat is the orbit size?\u003c\/strong\u003e The orbit size is 5\/16 inch, which is also listed as 8 mm.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCan it be used with vacuum dust extraction?\u003c\/strong\u003e Yes. MR-Series sanders can be converted to vacuum operation with an external or self-generating vacuum adapter.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat speed does it run at?\u003c\/strong\u003e It delivers true 12,000 RPM performance.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e","brand":"Mirka","offers":[{"title":"Default Title","offer_id":53385914646822,"sku":"MR-508","price":237.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260623121_1.jpg?v=1782171892","url":"https:\/\/www.toolnut.com\/products\/mirka-mr-508-5-in-pneumatic-finishing-sander-with-8-mm-orbit-mr-508","provider":"Tool Nut","version":"1.0","type":"link"}