Iscar 5621396 Toroidal Milling Tip 0.375 in 6 Flute IC908

Product Description

The ISCAR 5621396 is a toroidal-style end replaceable milling tip from the Multimaster MM ETR series, designed for high-performance milling in demanding production and job-shop environments. Made from sub-micrograin carbide with an IC908 grade and a PVD-applied TiAlN coating, this tip delivers wear resistance and thermal stability across a broad range of workpiece materials. With 6 flutes, a 30-degree helix angle, and a 90-degree lead angle, it is built for efficient chip evacuation and consistent surface finish. Installation and replacement are handled by machinists and tooling specialists working with Multimaster-compatible toolholders.

This milling tip is suited for applications involving steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. Its toroidal geometry and right-hand cut orientation make it effective in roughing and semi-finishing operations where tool life and edge stability are priorities. The 0.375-inch cutting width and 0.19-inch maximum depth of cut position it for smaller-diameter toolpaths requiring controlled radial and axial engagement. It conforms to ANSI standards.

Key Features

• Sub-micrograin carbide substrate with IC908 grade for extended tool life in difficult materials
• PVD TiAlN coating provides high heat resistance and reduced flank wear
• 6-flute toroidal geometry with 30-degree helix angle for smooth cutting action and chip flow
• 90-degree lead angle with 0.125-inch corner radius reduces radial cutting forces
• Right-hand cut, no chipbreaker — optimized for clean, consistent engagement
• ANSI-compliant; compatible with Multimaster MM ETR toolholder system

Compatibility

Designed for use with Multimaster MM ETR series toolholders accepting the .375A19R125 insert size. Suitable for machining steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials (ISO material codes P, M, K, N, S, H).

Installation Notes

End replaceable milling tips are installed and torqued by machinists or tooling technicians following the toolholder manufacturer's assembly procedure. Ensure the mating taper and threads on the toolholder are clean and free of chips or damage before seating the tip. Do not use air pressure to spin the spindle during tip changes. Follow all machine lockout and energy isolation procedures before handling rotating tooling components.