{"product_id":"bosch-4-1-2-in-40-grit-x-lock-type-29-flap-disc-for-metal-grinding-fdx2945040","title":"Bosch 4-1\/2-in. 40 Grit X-LOCK Type 29 Flap Disc for Metal Grinding (FDX2945040)","description":"\u003csection data-aplus\u003e\u003cdetails id=\"product-features\" class=\"acc\" open\u003e  \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"features\"\u003e      \u003cdiv class=\"card\"\u003e        \u003cdiv class=\"card-inside\"\u003e          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/tool-free-change.svg\" alt=\"tool-free-change\" class=\"aplusicon\"\u003e        \u003c\/div\u003e        \u003cdiv\u003e\u003cstrong\u003eFaster Disc Changes\u003c\/strong\u003e\u003c\/div\u003e        \u003cdiv class=\"feature-card\"\u003eThe X-LOCK mount snaps on and releases with a lever, so you spend less time swapping accessories and more time grinding or blending metal.\u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv class=\"card\"\u003e        \u003cdiv class=\"card-inside\"\u003e          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"aplusicon\"\u003e        \u003c\/div\u003e        \u003cdiv\u003e\u003cstrong\u003eZirconia Cuts Hard\u003c\/strong\u003e\u003c\/div\u003e        \u003cdiv class=\"feature-card\"\u003eZirconia alumina abrasive is built for tough metal work, giving you faster stock removal and better life than a basic disc in demanding shop conditions.\u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv class=\"card\"\u003e        \u003cdiv class=\"card-inside\"\u003e          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/angle.svg\" alt=\"angle\" class=\"aplusicon\"\u003e        \u003c\/div\u003e        \u003cdiv\u003e\u003cstrong\u003eType 29 Flap Disc\u003c\/strong\u003e\u003c\/div\u003e        \u003cdiv class=\"feature-card\"\u003eThe Bosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in is shaped for aggressive material removal and blending, especially when you are working edges, welds, and contours.\u003c\/div\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-overview\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\" data-product-summary\u003e    \u003cp\u003e\u003cstrong\u003eBosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in\u003c\/strong\u003e is a 4-1\/2 inch flap disc built for fast metal grinding and blending with small angle grinders. This is a flap disc designed for aggressive material removal on metal surfaces. Model \u003cstrong\u003eFDX2945040\u003c\/strong\u003e uses Bosch X-LOCK mounting for quicker changeouts and also fits standard 7\/8 inch arbor grinders, which makes it a practical choice for shops that run more than one grinder setup.\u003c\/p\u003e    \u003cp\u003eThe 40 grit layout is aimed at heavier stock removal, not fine finishing. If you are knocking down welds, cleaning up edges, or blending steel before moving to a finer abrasive, this grit makes sense. Bosch pairs that coarse grit with zirconia alumina abrasive, which is known for holding up better in harder metal applications and keeping removal rates up when the work gets more demanding.\u003c\/p\u003e    \u003cp\u003eWhat separates this disc from a basic arbor-style flap disc is the X-LOCK interface. On a Bosch X-LOCK grinder, it snaps on with no flange nuts and no spanner wrench. That means fewer loose parts to keep track of and less downtime when you need to switch from a flap disc to a cutoff wheel or wire wheel. If you are already on the X-LOCK system, that convenience adds up fast over a full day.\u003c\/p\u003e    \u003cp\u003eThe Type 29 profile matters too. This style is built for a more aggressive grinding angle, which helps when you are working outside edges, weld seams, and uneven surfaces. Bosch also calls out an optimized flap design for less vibration and improved grinding speed, plus a plastic backing that helps reduce the risk of gouging the workpiece. That is the kind of detail that makes blending easier when you need control, not just raw removal.\u003c\/p\u003e    \u003cp\u003eFor jobsite and shop use, the numbers are right where they should be for a 4-1\/2 inch angle grinder accessory. The disc is rated for a maximum of 13,300 RPM and weighs about 0.22 lb, so it is sized for common small grinder applications without adding unnecessary bulk. That makes it a good fit for fabrication benches, welding cleanup, field repairs, and general metal prep.\u003c\/p\u003e    \u003cp\u003eThis Bosch flap disc is a smart buy for welders, metalworkers, fabricators, mechanics, and serious DIY users who want faster accessory swaps and strong removal rates on steel and other metals. If you already own an X-LOCK grinder, the convenience is the main reason to step up. If you do not, the backward compatibility with standard 7\/8 inch arbor mounts still makes it easy to use in a mixed grinder lineup.\u003c\/p\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-benefits\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eSpend Less Time Changing Accessories\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"row\"\u003e      \u003cdiv class=\"img\"\u003e        \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260526265_2.jpg\" alt=\"Bosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in displayed with X-LOCK grinder accessories on a metal fabrication workbench in a shop\" class=\"tnblock-img\"\u003e      \u003c\/div\u003e      \u003cdiv class=\"copy\"\u003e        \u003cp\u003eX-LOCK is the real time-saver here. On an X-LOCK grinder, this flap disc snaps into place and releases with a lever, so you can move between grinding, blending, and other accessory changes without hunting for a wrench.\u003c\/p\u003e        \u003cul\u003e          \u003cli\u003eX-LOCK mounting is up to five times faster than conventional interfaces\u003c\/li\u003e          \u003cli\u003eNo flange nuts or spanner wrench required on X-LOCK grinders\u003c\/li\u003e        \u003c\/ul\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-benefits-2\" class=\"acc flip\"\u003e  \u003csummary\u003e\u003ch2\u003eBuilt for Heavy Metal Removal\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"row\"\u003e      \u003cdiv class=\"img\"\u003e        \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260526265_4.jpg\" alt=\"Bosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in grinding steel tubing with a small angle grinder in a metalworking shop\" class=\"tnblock-img\"\u003e      \u003c\/div\u003e      \u003cdiv class=\"copy\"\u003e        \u003cp\u003eThe combination of 40 grit abrasive and a Type 29 shape is geared toward fast removal on metal. It is a good setup for knocking down welds, cleaning edges, and blending uneven surfaces before the next finishing step.\u003c\/p\u003e        \u003cul\u003e          \u003cli\u003eZirconia alumina abrasive is made for durability and faster stock removal\u003c\/li\u003e          \u003cli\u003eDesigned specifically for metal grinding and blending applications\u003c\/li\u003e        \u003c\/ul\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-benefits-3\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eMore Control on Edges and Contours\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"row\"\u003e      \u003cdiv class=\"img\"\u003e        \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260526265_5.jpg\" alt=\"Bosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in mounted on a cordless grinder for metal blending work at a fabrication table\" class=\"tnblock-img\"\u003e      \u003c\/div\u003e      \u003cdiv class=\"copy\"\u003e        \u003cp\u003eA flap disc needs to cut without beating up the workpiece. Bosch uses a plastic backing to help reduce gouging, and the optimized flap design is intended to lower vibration and keep the disc working smoothly.\u003c\/p\u003e        \u003cul\u003e          \u003cli\u003ePlastic backing helps reduce the chance of gouging the material\u003c\/li\u003e          \u003cli\u003eOptimized flap design supports improved grinding speed with less vibration\u003c\/li\u003e        \u003c\/ul\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-at-a-glance\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eAt a Glance\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"stats-grid\"\u003e      \u003cdiv\u003e        \u003cdiv class=\"stat-value\"\u003e4-1\/2 in\u003c\/div\u003e        \u003cdiv class=\"stat-label\"\u003eDisc Diameter\u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv\u003e        \u003cdiv class=\"stat-value\"\u003e40\u003c\/div\u003e        \u003cdiv class=\"stat-label\"\u003eGrit\u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv\u003e        \u003cdiv class=\"stat-value\"\u003e13,300 RPM\u003c\/div\u003e        \u003cdiv class=\"stat-label\"\u003eMax Speed\u003c\/div\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e  \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003ctable class=\"aplusspecs\"\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/diameter.svg\" alt=\"diameter\" class=\"aplusicon\"\u003eDisc Diameter\u003c\/th\u003e        \u003ctd\u003e4-1\/2 in.\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/grit-range.svg\" alt=\"grit-range\" class=\"aplusicon\"\u003eGrit\u003c\/th\u003e        \u003ctd\u003e40\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/angle.svg\" alt=\"angle\" class=\"aplusicon\"\u003eDisc Type\u003c\/th\u003e        \u003ctd\u003eType 29 flap disc\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"aplusicon\"\u003eAbrasive Material\u003c\/th\u003e        \u003ctd\u003eZirconia alumina\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/speed.svg\" alt=\"speed\" class=\"aplusicon\"\u003eMaximum Speed\u003c\/th\u003e        \u003ctd\u003e13,300 RPM\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/weight.svg\" alt=\"weight\" class=\"aplusicon\"\u003eWeight\u003c\/th\u003e        \u003ctd\u003e0.22 lbs\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/arbor-size.svg\" alt=\"arbor-size\" class=\"aplusicon\"\u003eArbor Compatibility\u003c\/th\u003e        \u003ctd\u003eX-LOCK and standard 7\/8 in. arbor\u003c\/td\u003e      \u003c\/tr\u003e      \u003ctr\u003e        \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/made-in.svg\" alt=\"made-in\" class=\"aplusicon\"\u003eMade In\u003c\/th\u003e        \u003ctd\u003eTurkey\u003c\/td\u003e      \u003c\/tr\u003e    \u003c\/table\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"compat-list\"\u003e      \u003cdiv class=\"compat-row\"\u003e        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/spindle-lock.svg\" alt=\"spindle-lock\" class=\"icon-sm\"\u003e        \u003cdiv\u003e          \u003cstrong\u003eX-LOCK Grinders\u003c\/strong\u003e          \u003cdiv class=\"compat-detail\"\u003eDesigned for Bosch X-LOCK angle grinder systems with snap-on mounting and lever release.\u003c\/div\u003e        \u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv class=\"compat-row\"\u003e        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/arbor-size.svg\" alt=\"arbor-size\" class=\"icon-sm\"\u003e        \u003cdiv\u003e          \u003cstrong\u003eStandard Arbor Fit\u003c\/strong\u003e          \u003cdiv class=\"compat-detail\"\u003eBackward compatible with standard 7\/8 in. arbor mounts for use on conventional small angle grinders.\u003c\/div\u003e        \u003c\/div\u003e      \u003c\/div\u003e      \u003cdiv class=\"compat-row\"\u003e        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/sander.svg\" alt=\"sander\" class=\"icon-sm\"\u003e        \u003cdiv\u003e          \u003cstrong\u003eTool Category\u003c\/strong\u003e          \u003cdiv class=\"compat-detail\"\u003eDesigned specifically for use with a small angle grinder in metal grinding and blending work.\u003c\/div\u003e        \u003c\/div\u003e      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"tags\"\u003e      \u003cspan class=\"tag\"\u003eMetalworking\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eWeld Cleanup\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eSteel Grinding\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eBlending\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eFabrication Shops\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eAutomotive\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eGeneral Contracting\u003c\/span\u003e      \u003cspan class=\"tag\"\u003eDIY \/ Hobbyist\u003c\/span\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"tip-row\"\u003e      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e      \u003cp class=\"tip-text\"\u003eUse this Type 29 flap disc when you need to lean into weld seams or outside edges and remove material quickly. If you keep a finer flap disc nearby, the X-LOCK mount makes it easy to step down grits without wasting time between passes.\u003c\/p\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-warranty\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eWarranty \u0026amp; Support\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"warranty-row\"\u003e      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/warranty.svg\" alt=\"warranty\" class=\"icon-sm\"\u003e      \u003cdiv class=\"warranty-text\"\u003e        Lifetime warranty against manufacturer's defects.      \u003c\/div\u003e    \u003c\/div\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e    \u003ch3\u003eBosch X LOCK Arbor Type 29 40 Grit Flap Disc 4 1\/2in Makes the X-LOCK System Worth It\u003c\/h3\u003e    \u003cp\u003eIf you do regular metal grinding, this is the kind of flap disc that saves time two ways: fast changeouts and real removal rate.\u003c\/p\u003e    \u003cul\u003e      \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Welders, fabricators, mechanics, and anyone using a small angle grinder for metal cleanup or blending.\u003c\/li\u003e      \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The X-LOCK interface is faster and cleaner than old-school flange nut setups, and the zirconia 40 grit build is meant to work, not just look good on the shelf.\u003c\/li\u003e      \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This is a coarse, aggressive flap disc for removal and blending. If you need a smoother finish, plan on following it with a finer grit disc.\u003c\/li\u003e    \u003c\/ul\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-faqs\" class=\"acc\"\u003e  \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e  \u003cdiv class=\"acc-body\"\u003e    \u003cul\u003e      \u003cli\u003e\n\u003cstrong\u003eWill this disc fit only X-LOCK grinders?\u003c\/strong\u003e No. It is designed for X-LOCK, but it is also backward compatible with standard 7\/8 in. arbor mounts.\u003c\/li\u003e      \u003cli\u003e\n\u003cstrong\u003eWhat material is this flap disc intended for?\u003c\/strong\u003e Bosch specifies it for metal grinding and blending applications.\u003c\/li\u003e      \u003cli\u003e\n\u003cstrong\u003eIs 40 grit for finishing work?\u003c\/strong\u003e Not usually. A 40 grit flap disc is better suited to faster stock removal, weld cleanup, and early-stage blending.\u003c\/li\u003e      \u003cli\u003e\n\u003cstrong\u003eWhat is the maximum rated speed?\u003c\/strong\u003e The maximum speed is 13,300 RPM.\u003c\/li\u003e    \u003c\/ul\u003e  \u003c\/div\u003e\u003c\/details\u003e\u003c\/section\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":53249984594214,"sku":"FDX2945040","price":5.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260526265_1.jpg?v=1779887793","url":"https:\/\/www.toolnut.com\/products\/bosch-4-1-2-in-40-grit-x-lock-type-29-flap-disc-for-metal-grinding-fdx2945040","provider":"Tool Nut","version":"1.0","type":"link"}