Iscar 5605887 Milling Insert T490 Lnht 080404PNR IC830

Product Description

The ISCAR 5605887 is a solid carbide milling insert carrying the ANSI designation T490 LNHT 080404PNR IC830. It belongs to the HELITANG series and is engineered for indexable face and shoulder milling operations. The insert features a butterfly (LNHT) shape with a helical cutting edge style and a negative rake geometry. Applied with an AlTiN plus TiN dual-layer coating via PVD process under ISCAR Sumotec classification, the IC830 grade is formulated for wear resistance and thermal stability in demanding cutting conditions. The insert delivers four usable cutting edges on a double-sided body, making it a cost-effective option for high-volume machining environments where insert life directly affects cycle economics.

This insert is suited for milling steel, stainless steel, superalloys, and titanium alloys, covering ISO material groups P, M, and S. It is intended for use by machinists and CNC tooling specialists in job shops, aerospace component machining, and general metalworking facilities running shoulder or helical milling toolpaths. The insert seats into T490 LNK08 series cutter bodies and is secured by a screw-holding method. Maximum depth of cut reaches 0.3150 inches (8.00 mm), making it applicable for moderate-to-aggressive roughing and semi-finishing passes on difficult-to-machine materials.

Key Features

• IC830 grade solid carbide with AlTiN plus TiN PVD Sumotec coating for thermal and wear resistance
• Four cutting edges on a double-sided insert body for extended tool economy
• Helical cutting edge style with negative rake reduces shock loading on the cutter body
• Corner radius of 0.0157 inches (1/64 inch, 0.40 mm) suits tight-radius shoulder profiling
• PNR chip breaker geometry designed for steel, stainless steel, superalloys, and titanium
• Compliant with ANSI and ISO 13399 insert identification standards

Compatibility

Designed for use with T490 LNK08 series cutter bodies. Insert size code 080404 corresponds to an inscribed circle of 0.1670 inches and a cutting edge effective length of 0.3382 inches. Compatible cutter series compatibility is listed as T490 LNK08 per manufacturer data.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Ensure the spindle is fully stopped and the machine is locked out before indexing or replacing inserts. Seat the insert firmly against the pocket locating surfaces before tightening the clamping screw to avoid insert rocking or chatter. Inspect the pocket seating surface for chips or debris prior to installing a fresh edge, as contamination will affect insert position and surface finish.