{"product_id":"fresa-helicoidal-desbaste-vhm-z3-d20-i72-l130-s20-rh-negativo-nadia","title":"Spiral router bit Roughing VHM Z3 D20 I72 L130 S20 RH negative NaDia","description":"\u003ch1\u003eThree-flute roughing spiral end mill VHM from the SF51 series\u0026nbsp;\u003c\/h1\u003e\u003cp\u003eIndex: SF51.20.072.120.20XR\u003c\/p\u003e\u003cp\u003eIndustrial spiral end mill made from solid carbide (VHM) from the \u003cstrong\u003eSF51\u003c\/strong\u003e series with a negative design (chip removal downwards). Designed for efficient rough machining, cutting, and grooving on CNC machining centres and surface milling machines. The left-handed screw line (negative) presses the material against the work table, eliminating the risk of chipping on the upper edge of the workpiece. Three spiral flutes with a profiled chip breaker reduce cutting resistance, decrease spindle load, and effectively dampen vibrations during intense cutting. The ground shank in class H6 precision protects the drive system and ensures high process stability.\u003c\/p\u003e\u003ch3\u003eKey technical parameters and properties:\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eThree-flute roughing design Z3 (negative):\u003c\/strong\u003e Dedicated roughing profile with downward chip removal presses the workpiece against the table and provides a perfectly finished, clean upper edge.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003ePremium grade solid carbide (VHM):\u003c\/strong\u003e Rigid monolithic design minimizes tool deflection under load and guarantees high mechanical durability.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eGeometry with chip breaker:\u003c\/strong\u003e Divides the cut material into smaller pieces, reducing cutting resistance and stabilizing the system's operation.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eOptimised shank roughness:\u003c\/strong\u003e The shank surface features low roughness (Ra ≤ 0.3 µm), preventing slippage in the holder and protecting the spindle taper from wear.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDynamic balancing in class G2.5:\u003c\/strong\u003e Static-dynamic balancing according to ISO\/EN standards (class G2.5) eliminates vibrations at maximum rotational speeds.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAdvanced NaDia protective coating (series .XR):\u003c\/strong\u003e Black PVD coating with extreme hardness of 3650 HV and very low friction coefficient (0.01–0.05) applied at low temperatures. Drastically increases the blade's wear resistance, prevents material sticking, and significantly extends tool life during machining of wood, laminates, plywood, plastics, and aluminium.\u0026nbsp;\u0026nbsp;\u003c\/li\u003e\u003c\/ul\u003e","brand":"ITA TOOLS","offers":[{"title":"Default Title","offer_id":57445171233108,"sku":"SF51.20.072.120.20XR","price":248.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1080\/4183\/0740\/files\/SF51.20.072.120.20XR_SF51.20.072.120.20XR-111.jpg?v=1793968275","url":"https:\/\/es.ita.tools\/en\/products\/fresa-helicoidal-desbaste-vhm-z3-d20-i72-l130-s20-rh-negativo-nadia","provider":"ITA TOOLS","version":"1.0","type":"link"}