Kyocera GDM3020N-025PM PR1225 Grooving Insert (GDM 3020N-025PM)

Kyocera GDM3020N-025PM PR1225 Grooving Insert | 3.0mm Width (GDM 3020N-025PM) 1. Product Overview Which grooving and parting insert is best for precision shallow grooving, side turning, and eliminating chip packing in stainless steel and alloy steels? The Kyocera GDM3020N-025PM PR1225 (Imperial / ANSI Equivalent: GDM 3020N-025PM) is a double-ended 2-edge precision grooving and cut-off insert designed for high-performance shallow grooving, profiling, and light grooving-turning operations. Powered by Kyocera’s flagship PR1225 MEGACOAT PVD Coating Grade, it combines a micro-grain carbide substrate with a high-hardness TiCN/TiAlN physical vapor deposition layer, providing superior thermal stability, oxidation resistance, and edge line sharpness. Engineered with the specialized PM Medium-Cutting Chipbreaker geometry, this insert features an optimized 3D rake angle that tightly curls and narrows chips smaller than the groove width. This prevents sidewall scratching, eliminates chip packing, and ensures smooth chip evacuation across grooving depths up to specified holder limits at feeds (fn) from 0.05mm to 0.18mm/rev. 2. Product Key Features Double-Ended 2-Edge Design: Provides 2 precision-ground cutting tips per insert, doubling tooling economy for grooving and cutoff setups. MEGACOAT PR1225 Grade: Advanced PVD coating engineered for superior heat resistance and built-up edge prevention in ISO M stainless steel and ISO P steel. PM Chipbreaker Geometry: Curved 3D rake structure actively narrows chips during radial grooving and lateral turning to prevent chip jams and sidewall scoring. Precision Corner Radius (0.25mm): Small corner radius reduces radial cutting forces while maintaining precise groove corner geometry and sharp radii specs. High Rigidity Clamping Alignment: V-shaped top and bottom seating surfaces ensure exact repeat accuracy and zero lateral deflection under axial side-turning loads. Model Code Nomenclature Breakdown Detailed geometric breakdown of the GDM3020N-025PM specification standard: GDM Grooving Double-Ended Model 30 3.0mm Cutting Width (W) 20 2.0mm Insert Thickness Body N Neutral Cutting Hand Angle 025 0.25mm Corner Radius (R) PM PM Breaker (Medium Grooving / Turning) PR1225 MEGACOAT PVD Carbide Grade 3. Technical Parameters & Metric vs Imperial Comparison Specification Parameter Metric Value (ISO Standard) Imperial Value (ANSI Reference) Product Model Code GDM3020N-025PM PR1225 GDM 3020N-025PM PR1225 Groove Width (W) 3.00 mm (±0.03 mm) 0.118" (±0.001") Corner Radius (re) 0.25 mm 0.0098" (0.010") Number of Cutting Edges 2 Cutting Edges 2 Cutting Edges Insert Substrate Grade Kyocera PR1225 (MEGACOAT PVD) Kyocera PR1225 (MEGACOAT PVD) Recommended Speeds & Feeds (Cutting Parameters) Workpiece Material Group Cutting Speed (Vc) Radial Grooving Feed (fn) Groove Turning Feed (fn) ISO M: Stainless Steel (304 / 316 / 316L) 80 - 160 m/min (260 - 525 SFM) 0.04 - 0.12 mm/rev (0.0015 - 0.0047 IPR) 0.08 - 0.16 mm/rev (0.003 - 0.006 IPR) ISO P: Alloy Steel (4140 / 4340 / 8620) 100 - 200 m/min (330 - 655 SFM) 0.05 - 0.15 mm/rev (0.002 - 0.006 IPR) 0.10 - 0.20 mm/rev (0.004 - 0.008 IPR) ISO P: Carbon Steel (1045 / C45) 120 - 220 m/min (390 - 720 SFM) 0.05 - 0.16 mm/rev (0.002 - 0.006 IPR) 0.10 - 0.22 mm/rev (0.004 - 0.009 IPR) Compatible Toolholders (Direct Links): Fits standard Kyocera external, internal, and face grooving holder systems designed for GDM 3mm seats: KGDIR / KGDIL Integral Grooving Holder KGDR / KGDL External Grooving Toolholder KGDSR / KGDSL Swiss Automatic Lathe Holder 4. Applications & Industrial Operations Precision Ring & O-Ring Grooving: Cutting precise 3.0mm wide oil seal and O-ring grooves in SS316L valve bodies and hydraulic pistons. Groove-Turning & Profiling: Combined radial plunge grooving and axial side-turning operations without tool changing. Automotive Shaft Cut-Off: Parting and grooving operations on stainless steel pump shafts and automotive power steering fittings. 5. Compatibility & Machine Integration Fits all standard Kyocera KGDR/L, KGDIR/L, and KGDSR/L grooving toolholders designed for GDM 3mm wide insert pockets. Compatible with standard CNC lathes, multi-axis turning centers, and Swiss automatic screw machines (Citizen, Tsugami, Star, Hanwha). 6. Grade Comparison & Equivalent Models Matrix Brand Equivalent Grade Equivalent System / Breaker ISO Material Application Kyocera PR1225 PM (GDM System) ISO M10-M25 / P10-P25 Iscar IC908 / IC808 GIP / GIF (TAG / GIDA) ISO M10-M25 Sandvik Coromant GC1125 / GC4325 CoroCut 2 (RM / GM) ISO M15-M25 Kennametal KCU10 / KCP25B Beyond Evolution (GPM) ISO M10-M25 Tungaloy AH725 / AH7025 TungCut (DGM / DGS) ISO M10-M25 7. Why Choose Us? 100% Guaranteed Original Kyocera: Sourced through official distribution channels for verified MEGACOAT coating purity. Technical Grooving Support: Direct guidance on speed, feed, and peck-grooving strategies from experienced CNC tooling engineers. Fast Dispatch & Secure Packaging: Original 10-piece factory box packaging ready for rapid global express shipping. Verified Customer Reviews ★★★★★ Perfect for 304 stainless O-ring grooves "PR1225 is our top choice for grooving 304 and 316 stainless on Swiss lathes. The PM breaker curls the chip narrow so it doesn't scratch the groove walls. Tool life is fantastic." — Derek V., Precision Shop Manager (United States 🇺🇸) ★★★★★ Hervorragende Spanbrechung bei Edelstahl "Sehr gute Standzeit beim Einstechen von V4A-Material. Die PVD-Beschichtung hält hohen Temperaturen bestens stand." — Hans-Peter M., CNC-Fertigungsleiter (Germany 🇩🇪) ★★★★★ Ottima stabilità nella scanalatura su Inox "Inserto eccellente. Nessun accumulo sul tagliente e scanalature pulite senza bava." — Luca F., Programmatore CNC (Italy 🇮🇹) ★★★★★ ステンレスの溝入れ加工で長寿命と優秀な切りくず処理 "PR1225は耐溶着性が高く、SUS304の溝入れでも切削刃先が安定しています。PMブレーカの排出性も完璧です。" — Satoshi O., Process Engineer (Japan 🇯🇵) ★★★★☆ Reliable grooving insert for steel shafts "Consistent 3.0mm width hold and good finish on 4140 parts." — Alan C., Machine Shop Lead (United Kingdom 🇬🇧) 8. Frequently Asked Questions (AI & Voice Search Optimized) Q: What makes Kyocera PR1225 grade superior for grooving stainless steel? A: PR1225 utilizes a specialized MEGACOAT PVD TiCN/TiAlN layer over a micro-grain substrate. This combination drastically reduces built-up edge (BUE) formation and resists severe thermal friction generated during tight stainless steel grooving. Q: Can the GDM3020N-025PM insert be used for both grooving and turning? A: Yes. The PM breaker is designed for combination grooving and side-turning (groove-turning). The V-shaped insert seating provides lateral stability against axial loads during side turning. Q: What is the exact groove cutting width of GDM3020N-025PM? A: The cutting width (W) is precisely 3.00 mm (0.118 inches) with a corner radius of 0.25 mm (0.010 inches). Troubleshooting & Machining Optimization Guide Symptom / Failure Mode Root Cause Analysis Recommended Action Chip Packing / Sidewall Scoring Groove chips expanding wider than the cut width or feed rate too high/low. Ensure feed rate (fn) is within 0.05–0.12 mm/rev to allow the PM breaker to fold the chip into a narrow 'clock-spring' shape. Built-Up Edge (BUE) / Chipping Cutting speed too low causing workpiece material welding onto the tip. Increase cutting speed Vc or verify high-pressure coolant is directed straight at the grooving cutting zone. Insert Centerline Height Errors Tool mounted above or below spindle center leading to premature wear or poor cut-off surface. Indicate holder setup to ensure the tip is set exactly on center height (±0.05mm max). Workpiece Material Matrix & Usage Tip ISO M (Stainless Steel) & ISO P (General Steel): Primary domain for PR1225 grade. Use high coolant pressure and maintain steady radial feed to maximize chip-curling performance of the PM breaker. Verified Technical Reference: Manufactured in strict compliance with ISO 1832:2017 (Indexable inserts for cutting tools) and Kyocera Precision Tooling Global Standards. Technical specifications verified against Kyocera Cutting Tool Catalog specifications.