{"product_id":"onsrud-40-103-upcut-spiral-router-bit-3-16-in-hss","title":"Onsrud 40-103 Upcut Spiral Router Bit 3\/16 in Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ONSRUD 40-103 is a double-edge upcut spiral router bit designed for precise milling and routing operations in woodworking and light metalworking applications. It features a 0.1875-inch cutter diameter with a 0.625-inch length of cut, giving it the reach needed for clean through-cuts and slot work in thinner stock. The right-hand cutting direction and upcut flute geometry pull chips up and out of the cut, reducing heat buildup and keeping the workpath clear. At 2.875 inches overall length with a 0.25-inch shank diameter and 2.25-inch shank length, this bit seats securely in standard router collets. It is manufactured from high speed steel and ships uncoated. Installation and operation are handled by CNC operators, toolroom machinists, and skilled woodworkers.\u003c\/p\u003e\u003cp\u003eThis bit is rated for block and plate aluminum as well as natural wood. The upcut spiral geometry makes it particularly effective in CNC router tables where chip evacuation is a priority, such as when cutting plywood, MDF, solid wood panels, or thin aluminum plate. The helix angle ranges from 19 to 32 degrees, providing an aggressive but controlled cut geometry suited to both soft and moderately hard materials. It is not piloted, so accurate fixturing or machine guidance is required to maintain cut position.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUpcut flute geometry lifts chips out of the cut for cleaner slots and reduced heat\u003c\/li\u003e\n\u003cli\u003eDouble-edge design provides two cutting surfaces for efficient material removal\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction suits both wood and non-ferrous aluminum applications\u003c\/li\u003e\n\u003cli\u003e19 to 32 degree helix angle balances cut aggressiveness with surface finish quality\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction compatible with standard CNC router spindle rotation\u003c\/li\u003e\n\u003cli\u003eUncoated finish  -  no coating delamination risk in aluminum or resinous wood species\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003ePart of the ONSRUD 40-100 series. Designed for use in CNC routers and manual router tables equipped with a 1\/4-inch collet or collet reducer. Rated material applications include block and plate aluminum and natural wood.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified CNC operator or machinist. Power down and lock out the spindle before changing bits. Insert the shank fully into the collet and tighten to the router or spindle manufacturer's specified torque range  -  do not seat the bit with the flutes inside the collet. Verify spindle direction is right-hand rotation before engaging a cut. Eye protection and hearing protection are standard PPE when operating routing equipment.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutter Diameter\u003c\/strong\u003e: 0.1875 inches (3\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.625 inches (5\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches (1\/4 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBit Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Upcut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRouter Style\u003c\/strong\u003e: Double Edge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 19 to 32 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiloted\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Block and Plate Aluminum, Natural Wood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 40-100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ONSRUD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 40-103\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ONSRUD","offers":[{"title":"Default Title","offer_id":67918828699954,"sku":"40-103","price":28.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/df703ccf900fc4ab003079ed2e1c0dfd_37795d1b-9436-43c4-820f-b66975275c38.jpg?v=1791273460","url":"https:\/\/voomisupply.com\/products\/onsrud-40-103-upcut-spiral-router-bit-3-16-in-hss","provider":"Voomi Supply","version":"1.0","type":"link"}