{"product_id":"left-hand-downcut-spiral-router-bit-1-4-shank","title":"Left-Hand Downcut Spiral Router Bit, 1\/4 Shank | SHARPRO","description":"\u003cdiv class=\"sharpro-product-body sharpro-product-body--spacious sharpro-product-body--desktop-adaptive\" data-sharpro-product-body style=\"width: 100%; color: #242724; font-size: 1rem; line-height: 1.6; text-align: left;\"\u003e\n\u003cdiv class=\"sharpro-overview\" data-sharpro-overview\u003e\n\u003csection class=\"sharpro-overview-section sharpro-overview-machine\" style=\"margin: 0 0 20px;\"\u003e\u003ch3 class=\"sharpro-overview-heading\" style=\"margin: 0 0 12px; font-size: 1.05em; font-weight: 700; line-height: 1.3;\"\u003eMACHINE FIT:\u003c\/h3\u003e\n\u003cul class=\"sharpro-overview-list sharpro-overview-machine-list\" style=\"margin: 0; padding-left: 26px;\"\u003e\u003cli class=\"sharpro-overview-machine-item\" style=\"margin: 0;\"\u003eCompatible CNC equipment verified for rotation and feed direction\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\u003cp class=\"sharpro-overview-intro\" style=\"margin: 0 0 22px; line-height: 1.6;\"\u003eDowncut geometry presses cutting action into the surface to help reduce lifted fibers and laminate breakout.\u003c\/p\u003e\n\u003csection class=\"sharpro-overview-section sharpro-overview-materials\" style=\"margin: 0 0 22px;\"\u003e\u003ch3 class=\"sharpro-overview-heading\" style=\"margin: 0 0 14px; font-size: 1.05em; font-weight: 700; line-height: 1.3;\"\u003eEXCELLENT FOR CUTTING:\u003c\/h3\u003e\n\u003cul class=\"sharpro-overview-list sharpro-overview-material-list\" style=\"margin: 0; padding-left: 26px;\"\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0 0 8px;\"\u003ePlywood\u003c\/li\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0 0 8px;\"\u003eVeneers\u003c\/li\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0 0 8px;\"\u003eLaminates\u003c\/li\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0 0 8px;\"\u003eMDF\u003c\/li\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0 0 8px;\"\u003eWood\u003c\/li\u003e\n\u003cli class=\"sharpro-overview-material-item\" style=\"margin: 0;\"\u003eCompatible plastics\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"sharpro-overview-section sharpro-overview-specs\" style=\"margin: 0 0 24px; padding-bottom: 22px; border-bottom: 1px solid #d8ddd9;\"\u003e\u003cp class=\"sharpro-overview-spec-copy\" style=\"margin: 0; line-height: 1.65;\"\u003e\u003cstrong\u003eTOOL SPECS:\u003c\/strong\u003e Left-Hand Downcut Spiral Router Bit, 1\/4 Shank. Dimensions are listed as shank \/ cutting diameter \/ cutting length \/ overall length: 1\/4 \/ 1\/8 \/ 12mm \/ 50mm.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection class=\"sharpro-benefits-preview\" aria-labelledby=\"sharpro-benefits-preview-heading\"\u003e\u003ch3 id=\"sharpro-benefits-preview-heading\" class=\"sharpro-overview-heading\" style=\"margin: 0 0 14px; font-size: 1.05em; font-weight: 700; line-height: 1.3;\"\u003eWHY THIS TOOL:\u003c\/h3\u003e\n\u003cdiv class=\"sharpro-value-list\" aria-label=\"Product benefits\" style=\"display: grid; gap: 10px; margin: 0;\"\u003e\n\u003cdiv class=\"sharpro-value-item\"\u003e\n\u003cbutton class=\"sharpro-value-trigger\" type=\"button\" style=\"width: 100%; display: block; text-align: left; background: #f3f3f3; border: 1px solid #a4a4a4; border-radius: 2px; padding: 14px 16px; margin: 0; color: #111111; font: inherit; line-height: 1.55; cursor: pointer;\" data-sharpro-benefit-trigger aria-haspopup=\"dialog\" aria-controls=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-1\"\u003e\u003cspan class=\"sharpro-value-number\" aria-hidden=\"true\"\u003e1.\u003c\/span\u003e\u003cspan class=\"sharpro-value-copy\"\u003e\u003cstrong\u003eKeep the Visible Top Edge Cleaner:\u003c\/strong\u003e \u003cspan\u003eDowncut geometry presses cutting action into the surface to help reduce lifted fibers and laminate breakout.\u003c\/span\u003e\u003c\/span\u003e\u003c\/button\u003e\u003cdiv id=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-1\" class=\"sharpro-value-detail\" data-sharpro-benefit-detail hidden\u003e\n\u003ch3\u003eKeep the Visible Top Edge Cleaner\u003c\/h3\u003e\n\u003cp class=\"sharpro-value-detail__lead\"\u003eDowncut geometry presses cutting action into the surface to help reduce lifted fibers and laminate breakout.\u003c\/p\u003e\n\u003ch4\u003eWhy it helps\u003c\/h4\u003e\n\u003cp\u003eThe helix directs force and chips downward while the edge enters the top face.\u003c\/p\u003e\n\u003ch4\u003eHow the tool supports it\u003c\/h4\u003e\n\u003cp\u003eSHARPRO grinds the downcut flute and sharp edge from virgin solid carbide rod for top-surface-sensitive routing.\u003c\/p\u003e\n\u003ch4\u003eSetup check\u003c\/h4\u003e\n\u003cp\u003eTest on the actual veneer, plywood or laminate lot and inspect the top face before running finished parts.\u003c\/p\u003e\n\u003ch4\u003eOperating limit\u003c\/h4\u003e\n\u003cp\u003eThe lower face can show breakout; use compression geometry when both faces are visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sharpro-value-item\"\u003e\n\u003cbutton class=\"sharpro-value-trigger\" type=\"button\" style=\"width: 100%; display: block; text-align: left; background: #f3f3f3; border: 1px solid #a4a4a4; border-radius: 2px; padding: 14px 16px; margin: 0; color: #111111; font: inherit; line-height: 1.55; cursor: pointer;\" data-sharpro-benefit-trigger aria-haspopup=\"dialog\" aria-controls=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-2\"\u003e\u003cspan class=\"sharpro-value-number\" aria-hidden=\"true\"\u003e2.\u003c\/span\u003e\u003cspan class=\"sharpro-value-copy\"\u003e\u003cstrong\u003eReduce Workpiece Lifting:\u003c\/strong\u003e \u003cspan\u003eThe downward component of cutting force can help keep thin material seated against a properly supported spoilboard.\u003c\/span\u003e\u003c\/span\u003e\u003c\/button\u003e\u003cdiv id=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-2\" class=\"sharpro-value-detail\" data-sharpro-benefit-detail hidden\u003e\n\u003ch3\u003eReduce Workpiece Lifting\u003c\/h3\u003e\n\u003cp class=\"sharpro-value-detail__lead\"\u003eThe downward component of cutting force can help keep thin material seated against a properly supported spoilboard.\u003c\/p\u003e\n\u003ch4\u003eWhy it helps\u003c\/h4\u003e\n\u003cp\u003eFlute direction changes the axial force produced during cutting.\u003c\/p\u003e\n\u003ch4\u003eHow the tool supports it\u003c\/h4\u003e\n\u003cp\u003eThe helix and cutting edge are made as one solid-carbide geometry so the force direction remains consistent.\u003c\/p\u003e\n\u003ch4\u003eSetup check\u003c\/h4\u003e\n\u003cp\u003eVerify vacuum or clamps before cutting and listen for any change that suggests the sheet is moving.\u003c\/p\u003e\n\u003ch4\u003eOperating limit\u003c\/h4\u003e\n\u003cp\u003eThe tool does not replace secure workholding, especially on small parts or warped sheets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sharpro-value-item\"\u003e\n\u003cbutton class=\"sharpro-value-trigger\" type=\"button\" style=\"width: 100%; display: block; text-align: left; background: #f3f3f3; border: 1px solid #a4a4a4; border-radius: 2px; padding: 14px 16px; margin: 0; color: #111111; font: inherit; line-height: 1.55; cursor: pointer;\" data-sharpro-benefit-trigger aria-haspopup=\"dialog\" aria-controls=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-3\"\u003e\u003cspan class=\"sharpro-value-number\" aria-hidden=\"true\"\u003e3.\u003c\/span\u003e\u003cspan class=\"sharpro-value-copy\"\u003e\u003cstrong\u003ePlan Chip Removal in Deeper Cuts:\u003c\/strong\u003e \u003cspan\u003eDowncut tools trade top-face protection for a chip path that needs more attention in slots and pockets.\u003c\/span\u003e\u003c\/span\u003e\u003c\/button\u003e\u003cdiv id=\"sharpro-benefit-left-hand-downcut-spiral-router-bit-1-4-shank-3\" class=\"sharpro-value-detail\" data-sharpro-benefit-detail hidden\u003e\n\u003ch3\u003ePlan Chip Removal in Deeper Cuts\u003c\/h3\u003e\n\u003cp class=\"sharpro-value-detail__lead\"\u003eDowncut tools trade top-face protection for a chip path that needs more attention in slots and pockets.\u003c\/p\u003e\n\u003ch4\u003eWhy it helps\u003c\/h4\u003e\n\u003cp\u003eChips are pushed deeper instead of lifted directly out of the opening.\u003c\/p\u003e\n\u003ch4\u003eHow the tool supports it\u003c\/h4\u003e\n\u003cp\u003eAdequate flute space and a sharp edge support cutting, but pass strategy must still give chips room to leave.\u003c\/p\u003e\n\u003ch4\u003eSetup check\u003c\/h4\u003e\n\u003cp\u003eUse staged depths, dust extraction or air as appropriate and inspect the slot after the first pass.\u003c\/p\u003e\n\u003ch4\u003eOperating limit\u003c\/h4\u003e\n\u003cp\u003eStop if chips compact, heat rises or the tool begins recutting debris.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"SHARPRO","offers":[{"title":"1 \/ 1\/4 \/ 1\/8 \/ 12mm \/ 50mm","offer_id":45342127947799,"sku":"SPWS2LXD6.3.12","price":18.49,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/2994\/1783\/files\/18.png?v=1785067646","url":"https:\/\/www.sharpro.biz\/products\/left-hand-downcut-spiral-router-bit-1-4-shank","provider":"SHARPRO-Ultra","version":"1.0","type":"link"}