Midget Mill Classification/Identification - Severance Tools of Canada Ltd.

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Another Severance Tools innovation offering many fluting geometries backed by the highest standards.	Midget Mills® Tools Section Midget Mills® Sets & Kits Midget Mills® Regrinding Specials

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Midget Mill® Classifications
	H.S.S. Midget Mills® - Right hand spiral tooth pattern with a light chipbreaker originated by Severance Tool. These tools can take more shock than carbide. Mainly used on non-work hardening materials. Materials applications can include M2, M42, cold and hot roll steels, aluminum, cast iron and bronze.
	Carbide Midget Mills® - Right hand spiral tooth pattern invented by Rollin Severance, mainly intended for machine applications because of its deep radial flutes. Able to take a substantial amount of material off in an environment where the tool is not allowed to bounce or chatter out of control. Works best with materials applications using carbon steels, cast steels, gray irons, some stainless steel, tungsten, and nickel alloys.
	Carbo -Mills™ - Features a double cut tooth pattern, first introduced by Severance Tool. Intended for applications where there is substantial stock removal and a rough to medium finish is required. Works best with ferrous, non-work hardening materials. Materials applications can included steels, aluminum, cast iron, and bronze.
	Sever-Cuts™ - Developed by Severance Tool. These tools feature a super coarse cut designed with very course deep positive flutes with a large flute radius to remove material without loading up. Works best with nonferrous materials including aluminum, copper, bronze, nickel, and magnesium. Can be used with either hand or machine operations.
	Tangent Mills™ - Are left hand spiral, right hand cutting, and are especially designed to control tool wandering on curved surfaces. Ideal for finishing holes in tubing. Works best with ferrous, non-work hardening materials. Material applications can include M2, M42, cold & hot rolled steels, aluminum, cast iron, and bronze. See catalog page 16 for example.
	d-burrs™ - Feature the Herringbone™ cut invented by Severance Tool for fine finishing of plastic, aluminum, steel, and similar materials. The Herringbone™ Cut features alternating right hand and left hand flutes to give a fine finish on difficult deburring problems. See page 28 for standard shapes and sizes.

Other tooth patterns are available as a special cut upon request. Here are a few other examples.

Rasp or Diamond Cut

Straight Cut

Chatterless Chamfer Cut

Curve Tooth Cut

Tuff Cut

Pitches and Their Cut Numbers

The pitches of teeth ground on Severance Midget Mills® are illustrated below, close to full scale. The chart at the right relates cut numbers to tool diameters for Fine, Standard, Coarse and Super Coarse pitches. Standard pitch will always be supplied unless otherwise specified. If an unlisted pitch is required, order by cut number.
This cut numbering system applies to Severance Midget Mills®, Junior Mills®, Carbo-Mills™, etc., and to hand files. Sever-Cut™ tools all have "super coarse" teeth.

Tooth Pitch is indicated in the illustration below, close to full scale

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Midget Mills® Identification System