{"product_id":"kennametal-4129400-rpgv35e-kys25-round-ceramic-turning-insert","title":"Kennametal 4129400 RPGV35E KYS25 Round Ceramic Turning Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4129400 is a round ceramic turning insert in the KENDEX series, designed for high-performance metal removal on superalloys and titanium. It carries the industry standard designation RPGV35E and manufacturer grade KYS25, a SiAlON-based ceramic with a multilayer CVD coating of Al2O3 and TiCN. With four usable cutting edges, a positive rake geometry, and a honed cutting edge style, the 4129400 delivers high wear resistance across medium machining operations. The insert is 0.375 inches in inscribed circle diameter and 0.3125 inches thick, making it suited for demanding finish and semi-finish turning where tool life on difficult materials is the primary concern. Licensed machinists and CNC turning center operators are the primary installers.\u003c\/p\u003e\u003cp\u003eThis insert is built for turning, facing, and boring operations on superalloys and titanium — material group S workpieces that demand a ceramic grade with strong thermal and abrasion resistance. The positive side clearance and full-radius round shape allow it to be indexed into multiple cutting positions, supporting efficient use across production environments. Medium chip breaker geometry helps manage chip flow at moderate cutting depths, with a maximum depth of cut of 0.1249 inches. It is appropriate for both roughing passes at reduced parameters and semi-finish cuts where surface integrity is critical.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSiAlON ceramic substrate with multilayer CVD Al2O3 and TiCN coating for high wear resistance on superalloys and titanium\u003c\/li\u003e\n\u003cli\u003eRound insert shape (RPGV) with full radius and four cutting edges for maximum indexing value\u003c\/li\u003e\n\u003cli\u003ePositive rake and positive side clearance geometry reduces cutting forces on difficult workpiece materials\u003c\/li\u003e\n\u003cli\u003eHoned cutting edge style improves edge stability and reduces microchipping during interrupted or continuous cuts\u003c\/li\u003e\n\u003cli\u003eMulti-use application: compatible with turning, facing, and boring setups\u003c\/li\u003e\n\u003cli\u003eMedium chip breaker operation suits a range of feed rates and depth-of-cut parameters in the S material group\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard-grade insert for CNC turning centers and manual lathes using RPGV-style screw-on toolholders. ANSI insert code RPGV35, ISO insert code RPGV090700. Verify toolholder pocket geometry, screw hole alignment, and inscribed circle size before installation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque driver for the insert-clamping screw — refer to the toolholder manufacturer specifications for proper clamping torque. Inspect the toolholder pocket for wear, debris, or deformation before seating a new insert, as pocket damage will compromise edge position and part tolerance.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: RPGV35E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eANSI Insert Code\u003c\/strong\u003e: RPGV35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Insert Code\u003c\/strong\u003e: RPGV090700\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KYS25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: SiAlON\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Ceramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Al2O3 and TiCN (Multilayer CVD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Shape\u003c\/strong\u003e: R - Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Thickness\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.1875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Depth of Cut\u003c\/strong\u003e: 0.1249 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cutting Edges\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 11 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Clearance\u003c\/strong\u003e: Positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\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\u003eChip Breaker\u003c\/strong\u003e: Medium Machining\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: Superalloys and Titanium (Material Code S)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Turning, Facing, Boring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KENDEX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI, ISO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 insert\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0064 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 4129400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737284706610,"sku":"4129400","price":249.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/97fa7cdf5a6aa0ab1a3e618ac1520d38_c98d1511-708e-4f24-9111-07e70f680c85.jpg?v=1788786603","url":"https:\/\/voomisupply.com\/products\/kennametal-4129400-rpgv35e-kys25-round-ceramic-turning-insert","provider":"Voomi Supply","version":"1.0","type":"link"}