Milling Inserts Increase Machining Stability, Chip Evacuation

Tungaloy America, Inc. is expanding its DoTriple-Mill series to include pressed-to-size inserts in Class M dimensional tolerance. DoTriple-Mill, the company’s latest face mill series, enables any set of square, octagonal, or round inserts to be fitted on a single cutter body. The inserts are securely fixed to the cutter by a dovetail clamping mechanism, ensuring added insert reliability even during heavy milling.

The SNMU square insert line incorporates built-in wipers with 2-mm flat cutting edges, maximizing surface quality in roughing and finishing operations. The insert is designed to increase chip evacuation and machining stability, particularly in milling smearing materials like stainless steel.

The octagonal ONMU insert has 16 cutting edges and is built to maximize cost-per-insert economy, featuring an identical chipbreaker design for the SNMU insert. The round insert line, the RNMU, features robust cutting edges, providing benefits in milling unstable surfaces at a large depth of cut as well as in high-feed milling with a light depth of cut.

The new M-class insert line includes two new CVD grades: T3225 and T1215. T3225 is best suited for steel and stainless-steel milling, whereas T1215 is ideal for high-speed and high-performance milling of ductile cast iron and gray cast iron.