{"product_id":"walter-prototyp-7254992-corner-radius-end-mill-3mm-3-flute","title":"Walter-prototyp 7254992 Corner Radius End Mill 3mm 3-flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WALTER-PROTOTYP 7254992 is a solid carbide corner radius end mill engineered for demanding metal removal in steel and hard material applications. It features a 3 mm cutting diameter, a 0.5 mm corner radius, and a TiAlSiN PVD coating that extends tool life under high-heat cutting conditions. The three-flute, right-hand helical geometry supports both roughing and finishing operations in a single tool, reducing changeover time. With a 6 mm straight-cylindrical shank and a 57 mm overall length, the 7254992 mounts directly in standard toolholders. It is installed and operated by machinists and CNC tooling technicians working in job shop, production, or toolroom environments.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for milling steel and hard materials in CNC machining centers and manual milling machines. The centercutting geometry allows plunge entry, adding flexibility for pocketing and slotting operations. The extended reach design, with a 21 mm reach length, provides clearance in deeper cavities. The coarse pitch and high-helix flute configuration support aggressive chip evacuation in ferrous and hardened workpieces. The Series MC388 designation identifies it within the WALTER-PROTOTYP product family for solid carbide end mills.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction with fine grain material grade for rigidity and edge retention\u003c\/li\u003e\n  \u003cli\u003eTiAlSiN PVD coating resists heat and oxidation in high-speed steel and hard material cutting\u003c\/li\u003e\n  \u003cli\u003e0.5 mm corner radius reduces stress concentration at the cutting edge and extends tool life\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables plunge milling and flexible entry paths\u003c\/li\u003e\n  \u003cli\u003eExtended reach at 21 mm provides access to deeper features without additional tooling\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand flute direction with high helix for efficient chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard toolholders accepting a 6 mm straight-cylindrical shank. Shank diameter tolerance is h6 and mill diameter tolerance is h9. Primary workpiece materials are steel and hard materials (ISO material codes P and H).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC tooling technicians. Confirm toolholder bore size matches the 6 mm shank diameter and that runout is within acceptable limits before beginning a cut. Secure the shank to the full recommended engagement depth in the toolholder to prevent pull-out under cutting loads. Inspect the cutting edges for chipping or coating wear at regular intervals, as hard material applications accelerate edge wear.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3 mm (0.1181 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 8 mm (0.0472 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 57 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 21 mm (0.3150 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: High\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Coarse\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: h9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Fine Grain\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiAlSiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Classification\u003c\/strong\u003e: PVD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: MC388\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 2.56 inches x 0.47 inches x 0.47 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WALTER-PROTOTYP\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7254992\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":67913454649650,"sku":"7254992","price":143.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92c4d630a867c00572c363f2b154d046_51231a5d-95aa-4a6d-8d03-d363c183db65.jpg?v=1791245657","url":"https:\/\/voomisupply.com\/products\/walter-prototyp-7254992-corner-radius-end-mill-3mm-3-flute","provider":"Voomi Supply","version":"1.0","type":"link"}