Seco 03084155 Corner Radius End Mill 3/8 in 4 Flute Altin

Product Description

The SECO 03084155 is a solid carbide corner radius end mill designed for high-performance material removal in demanding machining applications. It features a 3/8-inch diameter, a 0.0200-inch corner radius, and four flutes with a variable helix geometry that reduces chatter and improves surface finish. The AlTiN PVD coating provides thermal resistance and extended tool life in abrasive materials. At 3 inches overall length with a 1-1/8-inch length of cut, this single-end, centercutting tool handles both roughing and finishing operations in a single setup. It belongs to the STR440.2 series and is built to micrograin carbide standards for edge retention under high-load conditions.

This end mill is engineered for use in stainless steel, superalloys, titanium, and hard materials — workpiece categories where tool wear and heat generation are the primary concerns. Typical applications include aerospace component machining, medical device manufacturing, die and mold work, and precision part production where tight tolerances and consistent surface quality are required. The centercutting design allows plunge entry, expanding its versatility in complex part geometries. It mounts in standard straight-bore toolholders with a 3/8-inch cylindrical shank.

Key Features

• Solid micrograin carbide construction for superior edge retention in hard and abrasive workpiece materials
• AlTiN PVD coating provides high heat resistance and extended tool life in stainless steel, superalloys, and titanium
• Variable helix flute geometry reduces harmonic vibration and chatter during extended cuts
• 0.0200-inch corner radius reduces stress concentration at cutting edges and extends tool life on corners
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Capable of both roughing and finishing in a single tool, reducing setup time and tool changes

Compatibility

Designed for use with standard straight-bore cylindrical toolholders accepting a 3/8-inch shank. Suitable for CNC machining centers and milling machines running applications in stainless steel, superalloys, titanium, and hard materials per STR440.2 series specifications.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully powered down and locked out per shop safety procedures. Verify toolholder bore condition and runout before seating the shank — the maximum TIR specification for this tool is 0.0005 inches, so holder cleanliness and clamping force directly affect tool life and part accuracy. Do not exceed recommended speeds and feeds for the workpiece material category, and confirm coolant strategy is appropriate since this tool does not feature through-coolant capability.