{"product_id":"fresa-helicoidal-desbaste-vhm-z3-d18-i55-l110-s18-rh-negativo","title":"Spiral router bit Roughing VHM Z3 D18 I55 L110 S18 RH negative ","description":"\u003ch1\u003eThree-flute roughing end mill VHM from the SF51 series\u0026nbsp;\u003c\/h1\u003e\u003cp\u003eIndex: SF51.18.055.110.18R\u003c\/p\u003e\u003cp\u003eIndustrial spiral end mill made of sintered carbide (VHM) from the \u003cstrong\u003eSF51\u003c\/strong\u003e\u0026nbsp; series with a negative design (chip removal downwards). Designed for efficient rough machining, cutting, and grooving on CNC machining centres and overhead spindle mills. The left-hand spiral (negative) geometry presses the material against the work table, eliminating the risk of tearing at the top edge of the workpiece. Three spiral flutes with a profiled chip breaker reduce cutting resistance, decrease spindle load, and effectively dampen vibrations during intensive cutting. The ground shank with an accuracy class of H6 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 evacuation presses the workpiece against the table and provides a perfectly finished, clean top edge.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003ePremium class monolithic carbide (VHM):\u003c\/strong\u003e Rigid monolithic design minimises tool deflection under load and guarantees high mechanical durability.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eGeometry with chip breaker:\u003c\/strong\u003e Divides 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 is characterised by low roughness (Ra ≤ 0.3 µm), which prevents slipping in the holder and protects the spindle cone 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 standards (class G2.5) eliminates vibrations at maximum rotational speeds.\u003c\/li\u003e\u003c\/ul\u003e","brand":"ITA TOOLS","offers":[{"title":"Default Title","offer_id":57445100650836,"sku":"SF51.18.055.110.18R","price":165.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1080\/4183\/0740\/files\/SF51.18.055.110.18R_SF51.18.055.110.18R-109.jpg?v=1791283627","url":"https:\/\/es.ita.tools\/en\/products\/fresa-helicoidal-desbaste-vhm-z3-d18-i55-l110-s18-rh-negativo","provider":"ITA TOOLS","version":"1.0","type":"link"}