Iscar 6403866 Thread Mill Tip 0.854 in 4 Flute Carbide

Product Description

The ISCAR 6403866 is a replaceable carbide milling tip designed for thread milling operations in CNC machining applications. Part of the Multimaster and SolidThread interchangeable tip system, it carries the full designation MM TRD22-W55-14P-4T08 and mounts to compatible MM TRD-W style arbors. The tip is ground from sub-micrograin carbide and coated with TiAlN via a PVD process, delivering hardness and thermal resistance needed for demanding thread profiles. With a 0.854 inch cutting diameter, a 4-flute configuration, and a 90-degree included angle, it is suited for right-hand thread forms across a broad range of workpiece materials. Licensed machinists and CNC tooling technicians are the primary installers.

This tip is engineered for thread milling across multiple material categories including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. It conforms to ANSI standards and is appropriate for both production and job-shop environments where a single tooling platform needs to handle varied workpiece materials without changing arbors. The 0.0079 inch corner radius keeps edge geometry consistent through thread profiles, and the absence of a chipbreaker keeps the geometry clean for threading operations where chip geometry is controlled by feed and speed parameters.

Key Features

• Sub-micrograin carbide substrate with PVD TiAlN coating for extended tool life in hard and abrasive materials
• 4-flute, right-hand cut geometry with 0.854 inch cutting diameter and 90-degree included angle
• Corner radius of 0.0079 inches for consistent thread form accuracy
• Compatible with Multimaster and SolidThread interchangeable arbor systems
• Rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials
• ANSI-standard geometry; no coolant-through requirement simplifies setup

Compatibility

Designed for use with ISCAR Multimaster and SolidThread series toolholders accepting the MM TRD-W interface. Insert size designation is D22-W55-14P. Verify arbor interface compatibility with the MM TRD22-W55 series before ordering.

Installation Notes

Installation and tip changes should be performed by a qualified CNC tooling technician with the machine in a full stop and lockout-tagout state. Use the recommended ISCAR torque wrench or key for the Multimaster interface to ensure proper seating without over-torquing the tip connection. Inspect the mating arbor nose for wear or contamination before installing a new tip. Follow shop-specific speeds and feeds for the target workpiece material category as no generic values apply across all supported materials.