{"product_id":"walter-6839031-ccmt09t302-fm4-wsm20s-turning-insert","title":"Walter 6839031 CCMT09T302-FM4 WSM20S Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe WALTER 6839031 is a solid carbide turning insert carrying the ISO designation CCMT09T302-FM4 WSM20S. It is designed for single-point turning operations on CNC and manual lathes and is used in turning, facing, and boring applications. The insert features an 80-degree diamond shape with a positive rake angle of 6 degrees and a honed cutting edge for consistent engagement. The WSM20S grade uses a PVD-applied TiCN, Al2O3, and Al multilayer coating that provides wear resistance and thermal stability. Two cutting edges are available per insert, and the FM4 chip breaker geometry promotes reliable chip control across a range of feed rates and depths.\u003c\/p\u003e\n\u003cp\u003eThis insert is intended for machining stainless steel and superalloys and titanium as primary workpiece materials, with steel as a secondary application. It falls within material grades M20, S20, and P20 under ISO classification. The FM4 chip breaker geometry is suited for light to medium roughing and finishing passes. The neutral hand orientation makes it compatible with standard right-hand toolholders designed for CCMT-style inserts. It is used in production and maintenance machining environments by CNC machinists and tool-and-die professionals.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePVD-coated WSM20S grade with TiCN, Al2O3, and Al multilayer coating for wear resistance on difficult-to-machine alloys\u003c\/li\u003e\n  \u003cli\u003eFM4 chip breaker geometry optimized for turning, facing, and boring on stainless steel, superalloys, and titanium\u003c\/li\u003e\n  \u003cli\u003e80-degree diamond insert shape with positive rake for reduced cutting forces\u003c\/li\u003e\n  \u003cli\u003eHoned cutting edge style for consistent tool life and edge integrity\u003c\/li\u003e\n  \u003cli\u003eTwo usable cutting edges per insert with screw-type insert holding method\u003c\/li\u003e\n  \u003cli\u003eConforms to ANSI and ISO standards under ISO code CCMT09T302-FM4 WSM20S\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CCMT-style screw-on toolholders with a neutral hand orientation. Compatible with toolholder systems accepting inserts with a 0.375-inch (3\/8-inch) inscribed circle, CCMT insert shape code C, clearance code C, and tolerance code M per ANSI and ISO standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by CNC machinists or manual lathe operators using a torx or hex key appropriate for the toolholder screw. The machine spindle must be brought to a full stop and all stored energy discharged before changing inserts. Seat the insert fully against the toolholder pocket before tightening the clamp screw, and inspect the seating surface for chips or debris that could affect insert stability. Verify correct insert orientation and cutting edge engagement before resuming machining.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO Code\u003c\/strong\u003e: CCMT09T302-FM4 WSM20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: CCMT3(2.5)0.5-FM4 WSM20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: Diamond 80 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WSM20S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN, Al2O3, Al (PVD Process)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: FM4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Positive, 6 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 7 degrees\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\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.20 mm (0.008 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 9.53 mm (0.375 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 9.67 mm (0.381 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3.97 mm (0.1563 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 4.40 mm (0.173 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 9.67 mm (0.381 inches)\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\u003eApplications\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: 0.011 pounds\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 6839031\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":51971373105458,"sku":"6839031","price":237.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/06334b5d1a3c359344168a56b5e9ef4f_ff1a157a-4b57-4a04-9ed1-632d55b3b8f0.jpg?v=1789956085","url":"https:\/\/voomisupply.com\/products\/walter-6839031-ccmt09t302-fm4-wsm20s-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}