{"product_id":"walter-6917248-ccmt120404-fm4-wsm20s-turning-insert","title":"Walter 6917248 CCMT120404-FM4 WSM20S Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe WALTER 6917248 is a solid carbide coated turning insert in the CCMT120404-FM4 WSM20S designation, designed for precision metal cutting operations on CNC lathes and turning centers. This insert features an 80-degree diamond (rhombic) shape with a positive rake angle and positive side clearance, making it well suited for finishing-grade chip loads. The FM4 chip breaker geometry controls chip flow during light to moderate depth-of-cut passes, and the PVD-applied TiCN\/Al2O3\/Al coating stack provides wear resistance and thermal stability. The insert holds two usable cutting edges per insert and is secured via screw clamping. It is installed by machinists and toolroom technicians working in production or job-shop turning environments.\u003c\/p\u003e\u003cp\u003eThis insert is intended for turning, facing, and boring applications where the primary workpiece material is stainless steel, superalloys, or titanium (ISO material codes M and S). It also performs in secondary applications on steel (ISO code P). The FM4 chip breaker is optimized for finishing operations, with a maximum depth of cut of 1.50 mm (0.1000 inch). The CCMT insert style seats in standard CCMT-compatible toolholders and is compliant with both ANSI (CCMT431-FM4 WSM20S) and ISO (CCMT120404-FM4 WSM20S) standards, making it interchangeable across a wide range of qualified toolholder systems.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePVD-coated with TiCN\/Al2O3\/Al multilayer for wear resistance on difficult-to-machine materials\u003c\/li\u003e\n\u003cli\u003eFM4 chip breaker geometry optimized for finishing cuts on stainless steel, superalloys, and titanium\u003c\/li\u003e\n\u003cli\u003e80-degree diamond insert shape provides a strong cutting edge with a 7-degree relief angle\u003c\/li\u003e\n\u003cli\u003ePositive rake and positive side clearance reduce cutting forces on tough workpiece materials\u003c\/li\u003e\n\u003cli\u003eTwo cutting edges per insert; screw-clamped holding method for repeatable seating\u003c\/li\u003e\n\u003cli\u003eDual ANSI and ISO compliance: CCMT431 and CCMT120404 size designations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CCMT-style screw-on toolholders compatible with ANSI size code 431 and ISO size code 120404. Suitable for turning, facing, and boring operations on stainless steel, superalloys, titanium, and steel workpieces.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate Torx or hex key to seat the clamping screw to toolholder manufacturer specifications  -  do not overtighten, as this can fracture the carbide body. Inspect the insert pocket and clamping components for chips or debris before seating a new insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: CCMT431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: CCMT120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: CCMT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: CCMT-FM4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: FM4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WSM20S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCN \/ Al2O3 \/ Al\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: C - Diamond (Rhombic) 80-Degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 80 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake Angle\u003c\/strong\u003e: 6 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Edge Style\u003c\/strong\u003e: Honed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiper Edge\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steel, Superalloys, Titanium (ISO M, S)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel (ISO P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M20, S20, P20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 12.90 mm (0.5080 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.40 mm (0.0157 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 5.50 mm (0.2170 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 1.50 mm (0.1000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Turning, Facing, Boring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WALTER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6917248\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":52015357198642,"sku":"6917248","price":337.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/06334b5d1a3c359344168a56b5e9ef4f_642a003e-3659-4c4d-b4a6-9c047aba347d.jpg?v=1790007697","url":"https:\/\/voomisupply.com\/products\/walter-6917248-ccmt120404-fm4-wsm20s-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}