{"product_id":"fresa-helicoidal-desbaste-vhm-z3-d12-i42-l90-s12-rh-negativo","title":"Spiral router bit Roughing VHM Z3 D12 I42 L90 S12 RH negative ","description":"\u003ch1\u003eThree-flute roughing end mill VHM from the SF51 series\u0026nbsp;\u003c\/h1\u003e\u003cp\u003eIndex: SF51.12.042.090.12R\u003c\/p\u003e\u003cp\u003eIndustrial spiral end mill made from solid cemented 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 keyway milling on CNC machining centres and overhead spindle milling machines. The left-hand spiral (negative) compresses the material against the working table, eliminating the risk of breakout on the upper edge of the workpiece. Three spiral blades with a profiled chip breaker reduce cutting resistance, lower spindle load, and effectively dampen vibrations during intensive cutting. The ground shank in accuracy class H6 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-flute roughing design Z3 (negative):\u003c\/strong\u003e Dedicated roughing profile with downward chip removal compresses the workpiece against the table and provides a perfectly finished, clean upper edge.\u003c\/li\u003e\u003cli\u003e\u003cstrong\u003ePremium class cemented carbide (VHM):\u003c\/strong\u003e The 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 machined material into smaller fragments, reducing cutting resistance and stabilizing the operation of the system.\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 cone 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\u003c\/ul\u003e","brand":"ITA TOOLS","offers":[{"title":"Default Title","offer_id":57445137908052,"sku":"SF51.12.042.090.12R","price":71.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1080\/4183\/0740\/files\/SF51.12.042.090.12R_SF51.12.042.090.12R-105.jpg?v=1791283794","url":"https:\/\/es.ita.tools\/en\/products\/fresa-helicoidal-desbaste-vhm-z3-d12-i42-l90-s12-rh-negativo","provider":"ITA TOOLS","version":"1.0","type":"link"}