Original Sweden Coromill 490R-08T308M-PM 4330 4 Edges Square Shoulder Milling Insert with Inveio CVD Coating for 90° True Square Shoulder Machining

The S Coromant 490R-08T308M-PM 4330 is a double-sided 4-edge indexable square shoulder milling insert belonging to the flagship CoroMill® 490 milling system from S Coromant (Sweden). It adopts PM medium-duty universal chipbreaker geometry, R0.8 nose radius, 90° true square shoulder forming capacity, paired with GC4330 CVD coated carbide grade featuring proprietary Inveio® coating technology. This insert balances high thermal wear resistance and edge toughness, optimized for roughing & semi-finishing of carbon steel, alloy steel and low-hardness pre-hardened mold steel. It supports full range milling operations including square shoulder side milling, face milling, slotting, plunge milling and contour profiling, perfectly matching all CoroMill 490 series cutter bodies with size 08 insert seats for CNC machining center mass mold and automotive component production

• Brand: S Coromant (Sweden world-leading precision cutting tool manufacturer)
• Full Official ISO Model Code: 490R-08T308M-PM 4330
• Product Series: CoroMill® 490 multi-functional square shoulder milling insert
• Insert Shape: Double-sided square indexable insert, 4 usable cutting corners
• Insert Size Code: 08 (standard small size for CoroMill 490 tool bodies)
• Inscribed Circle IC: 8.5 mm
• Insert Thickness S: 3.3 mm (T3 specification)
• Corner Radius RE: 0.8 mm
• Main Cutting Edge Angle: 90° perfect square shoulder forming
• Chipbreaker Code: PM medium general-purpose chipbreaker for balanced rough & semi-finish
• Coating Grade: GC4330 multi-layer CVD composite coating with Inveio® tech
• Coating Structure: TiCN base layer + Al₂O₃ thermal barrier + TiN golden top finish
• Substrate Characteristic: Tough fine-grained cemented carbide substrate, anti-chipping for interrupted cutting
• Max Recommended Work Hardness: ≤ HRC 42 pre-hardened steel
• Compatible Cutter Bodies: All CoroMill 490 end mills & face mills with size 08 insert pockets
• Standard Pack Specification: 10 pieces per original S sealed plastic compartment box
• Origin: Made in Sweden

• Carbon steel: S45C, 1045, Q235, mild structural steel
• Pre-hardened mold steel: P20, 718H, NAK80 (HRC 28–42)
• Alloy structural steel: 4140, 40Cr, gear steel
• Grey cast iron, ductile iron, compacted graphite iron
• Low-alloy steel forgings for automotive chassis parts

• High-efficiency 90° square shoulder side roughing & semi-finishing for plastic mold bases and die casting molds
• Large-area face milling and step surface machining of automotive engine blocks, hydraulic valve manifolds
• General slotting, plunge ramping and 2D contour profiling for mechanical general components
• Interrupted cutting with uneven machining allowance, requiring stable anti-chipping performance
• Mass automated CNC production of steel workpieces with mixed rough and semi-finish operations
• Multi-task job shops with universal steel milling requirements for long tool life consistency

• GC4330 Inveio® CVD coating technology: Ultra-stable aluminum oxide thermal barrier drastically reduces flank wear under high-speed dry & wet steel milling, delivering 30% longer service life compared with conventional CVD grades
• PM medium-duty optimized chipbreaker design: Balanced chip curling performance for both heavy rough feed and fine semi-finish cuts, eliminates long tangled chips and improves machine evacuation efficiency
• Double-sided 4-edge square geometry: Four usable cutting corners double the total service life vs single-sided inserts, greatly lowering long-term tool procurement cost for mass production
• Tough shock-resistant carbide substrate: Reinforced cutting edge micro-strengthening technology suppresses edge chipping during interrupted slotting and uneven stock removal
• Precise 90° forming edge: Produces clean vertical square shoulders without secondary finishing operation, saves extra machining cycle time
• Universal CoroMill 490 system compatibility: Fully interchangeable with all size 08 CoroMill 490 end mill and face mill cutter bodies, unified inventory management for foreign trade tool stocking