{"product_id":"walter-7021257-turning-insert-dcgt11t304-mm4-wsm01","title":"Walter 7021257 Turning Insert DCGT11T304-MM4 WSM01","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe WALTER 7021257 is a carbide turning insert designed for precision metal removal in demanding machining environments. Manufactured to ISO and ANSI standards, this insert carries the ISO designation DCGT11T304-MM4 WSM01 and features a PVD-applied TiAlN, Al2O3, and ZrN multilayer coating for extended tool life in high-heat cutting conditions. The 55-degree diamond (rhombic) insert geometry provides a positive rake angle and a 7-degree relief angle, reducing cutting forces and heat generation. With a 0.4 mm corner radius and a honed cutting edge style, it suits finishing and medium-roughing operations across a range of workpiece materials. Installation is via screw-holding method, standard on most indexable toolholders.\u003c\/p\u003e\u003cp\u003eThis insert is suited for turning, facing, boring, and back turning operations. Primary workpiece materials are stainless steel, superalloys, and titanium. Secondary workpiece materials include steel, non-ferrous metals, and hard materials, corresponding to ISO material grades M10, S10, P10, N10, and H20. The MM4 chip breaker geometry is optimized for roughing and medium machining passes. This insert is a multi-use tool appropriate for a broad range of lathe and machining center applications in both production and job-shop environments. Licensed machinists and CNC operators are the typical end users.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePVD-applied TiAlN, Al2O3, and ZrN coating for thermal resistance and wear life\u003c\/li\u003e\n\u003cli\u003e55-degree diamond (rhombic) insert shape with positive rake and 7-degree relief angle\u003c\/li\u003e\n\u003cli\u003eMM4 chip breaker for effective chip control during roughing and medium machining\u003c\/li\u003e\n\u003cli\u003e0.4 mm corner radius with honed cutting edge for reduced edge chipping\u003c\/li\u003e\n\u003cli\u003eTwo cutting edges per insert for extended usable life per unit\u003c\/li\u003e\n\u003cli\u003eScrew-held mounting compatible with standard DCGT-style indexable toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement for DCGT-MM4 series indexable toolholders accepting DCGT11T304 inserts with screw-holding method. Industry standard number DCGT3(2.5)1-MM4 WSM01 per ANSI and ISO standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis insert is installed and indexed by qualified machinists or CNC operators. Power down and lock out the machine spindle before changing or indexing inserts. Use the appropriate torx or hex key for the insert clamping screw and do not overtighten, as carbide inserts are brittle and can crack under excessive clamping force. Inspect the toolholder seating pocket for chips or wear before installing a new insert.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DCGT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Size Code\u003c\/strong\u003e: 11T304\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: D - Diamond (Rhombic) 55 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 55 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.4 mm (0.0157 inches, 1\/64 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 11.63 mm (0.458 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 9.53 mm (0.375 inches, 3\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 3.97 mm (0.1563 inches, 5\/32 inch)\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: 11.63 mm (0.458 inches)\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: 7 degrees positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Hand\u003c\/strong\u003e: Neutral\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\u003eNumber of Cutting Edges\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN, Al2O3, ZrN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: WSM01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker\u003c\/strong\u003e: MM4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip Breaker Operation\u003c\/strong\u003e: Roughing, Medium Machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steel, Superalloys, Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Material\u003c\/strong\u003e: Steel, Non-Ferrous Metal, Hard Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M10, S10, P10, N10, H20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Use Application\u003c\/strong\u003e: Turning, Facing, Boring, Back Turning\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: 0.013 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: 7021257\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WALTER","offers":[{"title":"Default Title","offer_id":52096029360434,"sku":"7021257","price":424.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e182d6c10ff8bd338bfebf0c5e2fbfe8.jpg?v=1790066140","url":"https:\/\/voomisupply.com\/products\/walter-7021257-turning-insert-dcgt11t304-mm4-wsm01","provider":"Voomi Supply","version":"1.0","type":"link"}