Tooling & Workholding

Milling Tools

Milling is the work of producing a flat or precision-contoured surface on a machined workpiece by using a rotating tool, and generally by taking multiple parallel passes with that tool. The work can be done on a machining center or milling machine, and can also be done on a lathe, turning center or turn-mill machine that happens to have rotary tool (or “live tool”) capabilities. The tools for milling include both solid tools and inserted tools—the latter consisting of a tool body that uses replaceable cutting inserts. Carbide is the most likely material for milling tools, though high speed steel is another choice, as are ceramic, cermet and diamond tools in certain more demanding milling applications. A common milling tool variety is the “end mill,” which generally describes a relatively narrow cylindrical tool that can mill on both its tip and its side, and can reach into various constrained features and spaces. The end mill can be flat-bottomed for flat surfaces, or ball-nosed for milling up, down and along the contours of complex milled shapes such as die and mold surfaces. Another common milling tool variety is the “face mill,” a generally larger-diameter tool designed for efficiently milling a wide, flat surface in an economical number of passes.

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Featured Zone Content

Video: Hard Pocket Milling


Relieved end mills and pre-machining of corners are two important considerations for accurate pocket machining in hard steel.



People are Part of the Process for Machining Inconel

By: Peter Zelinski
A Tacoma shop describes its winning strategy for efficient machining of Inconel. That strategy includes careful choices of cutting tools and cutting parameters. It also includes a healthy breakfast.

Heule Tool catalog

Drilling, Back-Spotfacing Tools Highlighted

By: Edited by Stephanie Monsanty
Heule Tool Corp. covers its full product line in a 228-page catalog that includes technical data, illustrations, programming and instructional information, as well as application reference material.

LMT Onsrud 67-220 chipbreaker tooling

Progressive Chipbreaker Cuts Composite Materials

By: Edited by Stephanie Monsanty
LMT Onsrud’s 67-220 series progressive chipbreaker tooling is designed to promote chip control and increase tool life in cutting composite materials.

OSG’s Phoenix Catalog for Indexable Drilling and Milling

By: Lori Beckman (editor)
The OSG Phoenix Vol. 4 catalog is available in print and digital versions.

Horn M117P face milling cutter

Face Milling Cutter for High-Polish Milling

By: Edited by Stephanie Monsanty
Horn’s M117P face milling cutter is designed for high-polish milling applications.


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