{"product_id":"fresa-helicoidal-desbaste-vhm-z3-d18-i55-l110-s18-rh-negativo-nadia","title":"Spiral router bit Roughing VHM Z3 D18 I55 L110 S18 RH negative NaDia","description":"\u003ch1\u003eThree-Edge Roughing Spiral Mill VHM from the SF51 Series\u0026nbsp;\u003c\/h1\u003e\u003cp\u003eIndex: SF51.18.055.110.18XR\u003c\/p\u003e\u003cp\u003eIndustrial spiral mill made of sintered carbide (VHM) from the \u003cstrong\u003eSF51\u003c\/strong\u003e\u0026nbsp; series with a negative construction (chip ejection downwards). Designed for efficient rough machining, cutting, and grooving on CNC machining centres and overhead milling machines. The left-handed screw line (negative) presses the material to the work table, eliminating the risk of tear-outs on the upper edge of the workpiece. Three spiral cutting edges with a profiled chip breaker reduce cutting resistance, lower spindle load, and effectively dampen vibrations during intensive cutting. The ground shank in the H6 accuracy class protects the drive system and ensures high stability of the process.\u003c\/p\u003e\u003ch3\u003eKey technical parameters and properties:\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eThree-Edge Roughing Design Z3 (Negative):\u003c\/strong\u003e Dedicated roughing profile with downward chip ejection presses the workpiece against the table and ensures a perfectly finished, clean upper edge.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003ePremium Class Sintered Carbide Monolith (VHM):\u003c\/strong\u003e Rigid monolithic construction minimizes tool deflection under load and guarantees high mechanical durability.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eGeometry with Chip Breaker:\u003c\/strong\u003e Splits the machined material into smaller fragments, reducing cutting resistance and stabilising 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 slipping 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 in accordance with ISO\/EN standard (class G2.5) eliminates vibrations at maximum rotational speeds.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eAdvanced Protective Coating NaDia (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 edge'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":57445190500692,"sku":"SF51.18.055.110.18XR","price":180.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1080\/4183\/0740\/files\/SF51.18.055.110.18XR_SF51.18.055.110.18XR-111.jpg?v=1793968272","url":"https:\/\/es.ita.tools\/en\/products\/fresa-helicoidal-desbaste-vhm-z3-d18-i55-l110-s18-rh-negativo-nadia","provider":"ITA TOOLS","version":"1.0","type":"link"}