Internal Tool 69-4060 Tapered End Mill 3 Flute Solid Carbide

Product Description

The INTERNAL TOOL 69-4060 is a solid carbide tapered end mill designed for precision milling in demanding metal-cutting applications. It features a 15-degree taper angle per side, a small end diameter of 0.1250 inches, and a 0.4670-inch length of cut. The three-flute, right-hand helical configuration provides efficient chip evacuation while maintaining surface finish quality. Built from micrograin solid carbide, this tool delivers the rigidity and edge retention required when working through tough workpiece materials. It ships in a bright, uncoated finish and is suited for machinists, toolroom operators, and CNC programmers who need a reliable tapered profile cutter.

This end mill is intended for milling tapered slots, die cavities, engraving paths, and angled wall features in ferrous and high-strength materials. Primary workpiece material compatibility includes steel, stainless steel, cast iron, super alloys, and titanium. The 3/8-inch shank diameter fits standard ER and side-lock toolholders common on vertical machining centers and CNC mills. With a 2.5-inch overall length, it offers adequate reach for moderate-depth tapered features without sacrificing stiffness.

Key Features

• 15-degree taper angle per side (30-degree included angle) for accurate tapered wall geometry
• Micrograin solid carbide construction for superior hardness and edge retention
• Three right-hand helical flutes for balanced cutting and chip removal
• Small end diameter of 0.1250 inches for fine tapered slot entry
• Bright, uncoated finish suitable for use with or without coolant on compatible materials
• Non-centercutting design - requires a pre-drilled or pre-milled entry point

Compatibility

Designed for use on steel, stainless steel, cast iron, super alloys, and titanium workpieces. Fits standard 3/8-inch toolholders on CNC vertical machining centers and manual mills. Belongs to INTERNAL TOOL Series 69.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Secure the 3/8-inch shank in a clean, properly sized collet or toolholder and verify runout before cutting. This tool is not centercutting - always begin in a pre-machined pocket or use a plunge-capable tool to establish the entry point before engaging the tapered end mill. Follow machine manufacturer guidelines for spindle speed and feed rate based on workpiece material and depth of cut.