{"product_id":"fresa-helicoidal-desbaste-vhm-z3-d20-i102-l165-s20-rh-negativo-nadia","title":"Spiral router bit Roughing VHM Z3 D20 I102 L165 S20 RH negative NaDia","description":"\u003ch1\u003eThree-flute coarse spiral end mill VHM from the SF51 series\u0026nbsp;\u003c\/h1\u003e\u003cp\u003eIndex: SF51.20.102.165.20XR\u003c\/p\u003e\u003cp\u003eIndustrial spiral end mill made of solid sintered carbide (VHM) from the \u003cstrong\u003eSF51\u003c\/strong\u003e\u0026nbsp; series with a negative design (chip removal downwards). Designed for efficient coarse machining, cutting, and pocketing on CNC machining centres and vertical spindle milling machines. The left-hand screw line (negative) presses the material against the work table, eliminating the risk of tear-out on the upper edge of the workpiece. Three spiral blades 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 coarse design Z3 (negative):\u003c\/strong\u003e Dedicated coarse profile with downward chip removal presses the workpiece against the table and provides a perfectly finished, clean top 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 Divides the cut material into smaller fragments, 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), which prevents slipping in the holder and protects the spindle taper from wear.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003eDynamic balancing 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\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 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":57445171331412,"sku":"SF51.20.102.165.20XR","price":305.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1080\/4183\/0740\/files\/SF51.20.102.165.20XR_SF51.20.102.165.20XR-111.jpg?v=1793968276","url":"https:\/\/es.ita.tools\/en\/products\/fresa-helicoidal-desbaste-vhm-z3-d20-i102-l165-s20-rh-negativo-nadia","provider":"ITA TOOLS","version":"1.0","type":"link"}