Seco 74068812 Ball Nose Milling Tip 0.315 in Carbide MM08

Product Description

The SECO 74068812 is a ball nose replaceable milling tip engineered for precision profiling in demanding metal-cutting applications. Part of the Minimaster MM08 series, this carbide tip features a 0.315-inch cutting diameter, a 0.319-inch maximum depth of cut, and two flutes for efficient chip evacuation. The F30M grade carbide substrate is coated with TiAlN and TiN via a PVD process, delivering thermal resistance and edge durability at elevated cutting speeds. The MD03 chipbreaker geometry and 90-degree lead angle support stable profiling operations in steel, stainless steel, cast iron, superalloys, titanium, and hard materials. A right-hand cutting orientation and 0.157-inch corner radius complete the geometry. Installed by machinists and toolroom professionals on compatible Minimaster holders.

This milling tip is suited for profiling and contouring operations across a wide range of metallic workpieces, including P-grade steels (P20, P30), M-grade stainless steels (M10, M20), K-grade cast irons (K20, K30), and H-grade hard materials (H10). The 0.371-inch functional length and 9.42 mm extension from holder provide consistent reach geometry in tight-tolerance cavities. The tip meets ANSI standards and is indexed into Minimaster-compatible toolholders without coolant-through capability. Typical applications include die and mold profiling, aerospace component finishing, and general CNC milling where a repeatable, replaceable insert tip reduces downtime versus solid end mills.

Key Features

• 0.315-inch cutting diameter with 0.319-inch maximum depth of cut for precise ball-nose profiling
• F30M carbide grade with TiAlN and TiN PVD coating for heat resistance and extended tool life in ferrous and hard materials
• MD03 chipbreaker geometry with 90-degree lead angle supports stable chip control in profiling cuts
• Two-flute, right-hand design with 0.157-inch corner radius for smooth surface finish in contoured features
• Fits Minimaster MM08-series toolholders as a quick-change replaceable tip, reducing setup and changeover time
• Rated for primary workpiece materials: Steel, Stainless Steel, Cast Iron, Superalloys, Titanium, and Hard Material

Compatibility

Designed as a replaceable milling tip for SECO Minimaster MM08-series toolholders. Insert size designation is 0.315-B90. Compatible workpiece material codes are P, M, K, S, and H per standard grade classifications. No additional holder model numbers were specified in the product data.

Installation Notes

This tip is installed by qualified machinists or toolroom technicians on a compatible Minimaster toolholder. Power down and lock out the machine spindle before seating or removing any indexable tip. Use the correct Minimaster torque key to secure the tip; do not use substitutes that may damage the coupling interface. Inspect the seating surface on the holder for chips or damage before each installation to ensure accurate tip positioning and runout.