{"product_id":"somta-series-1na-6-35-mm-no-3-hss-centre-drill","title":"Somta Series 1NA – 6.35 mm (No. 3) HSS Centre Drill","description":"\u003cp\u003e\u003cstrong\u003eSomta Series 1NA – 6.35 mm (No. 3) HSS Centre Drill | 1NA0003\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSOMTA 1NA0003\u003c\/strong\u003e is a \u003cstrong\u003eHigh-Speed Steel Centre Drill (No. 3)\u003c\/strong\u003e engineered to \u003cstrong\u003eAmerican Standard Form A (60°)\u003c\/strong\u003e for precise pilot and countersink hole production prior to turning or grinding. Its rigid HSS body delivers outstanding strength, heat resistance, and wear performance, ensuring accurate, concentric centres and smooth running in all general engineering materials.\u003c\/p\u003e\n\u003cp\u003eDesigned for professional machining applications, this tool combines precision-ground geometry with a bright finish for clean chip evacuation and burr-free holes. Ideal for centering operations on steel, cast iron, and non-ferrous metals requiring repeatable accuracy and superior surface finish.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Steel (HSS)\u003c\/strong\u003e – Provides exceptional hardness, toughness, and resistance to heat and abrasion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm A 60° Included Angle\u003c\/strong\u003e – Meets American Standard geometry for accurate pilot and countersink formation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBright Finish\u003c\/strong\u003e – Reduces friction and minimises burr formation for cleaner hole edges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-Ground Flutes\u003c\/strong\u003e – Promotes smooth chip removal and consistent hole geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort, Rigid Construction\u003c\/strong\u003e – Ensures stability and reduces deflection during high-speed operations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart No:\u003c\/strong\u003e 1NA0003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 1NA (Centre Drills – American Standard Form A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Type:\u003c\/strong\u003e HSS Centre Drill No. 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Diameter (d):\u003c\/strong\u003e 2.78 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Diameter (d₁):\u003c\/strong\u003e 6.35 mm (≈ 1\/4″)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Length (l₂):\u003c\/strong\u003e 2.8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length (l₁):\u003c\/strong\u003e 51 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Angle:\u003c\/strong\u003e 60° Included Angle (Form A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Bright Finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuited Materials:\u003c\/strong\u003e General engineering steels, cast irons, and non-ferrous metals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose SOMTA Cutting Tools?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Manufacturing\u003c\/strong\u003e – Built to ANSI standards for dimensional accuracy and consistency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Performance\u003c\/strong\u003e – Maintains tight tolerances and true centres in every operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Durability\u003c\/strong\u003e – Hardened HSS construction ensures long tool life under continuous use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Brand Quality\u003c\/strong\u003e – Manufactured by SOMTA Tools, a leader in precision cutting since 1954.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe \u003cstrong\u003eSOMTA 1NA0003\u003c\/strong\u003e offers reliable accuracy, exceptional finish quality, and long-term performance for centre-drilling applications. Available through \u003cstrong\u003eTwin Eagle Imports\u003c\/strong\u003e — your trusted source for premium industrial cutting tools and machining solutions.\u003c\/p\u003e","brand":"SOMTA","offers":[{"title":"Default Title","offer_id":51244943081508,"sku":"1NA0003","price":19.36,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/5598\/3396\/files\/somta-drills-somta-series-1na-6-35-mm-no-3-hss-centre-drill-4748353106036-1207373585.png?v=1786421602","url":"https:\/\/www.layerspecdynamics.com\/de\/products\/somta-series-1na-6-35-mm-no-3-hss-centre-drill","provider":"LayerSpec Dynamics","version":"1.0","type":"link"}