Micro-Diameter Endmills and Drills

January 13, 2023
Towa USA Corp.

Established in 1979, TOWA with headquarters in Kyoto Japan is the global leader in the manufacturing of Ultra-Precision Molds, and Molding Equipment for the Semiconductor Industry. Through the manufacturing of ultra-precision molds, TOWA as developed their own line of Micro-Diameter Endmills and Drills that boast high accuracy, with excellent wear resistances, sharpness, and long life. TOWA is now introducing their Endmill Product Line to the North American Market.

Endmills tipped with CBN, which is the second hardest material after diamond, are offered in sizes ranging from 6mm down to 0.1mm in diameter, with various configurations, from sharp corner, radius corner, ball, standard neck length and extended neck length. TOWA offers their CBN endmills in multi-flute configurations. By maintaining the same feed per flute, and increasing the number of flutes, cutting time is reduced, while profitability is increased. The CBN series of endmills, due to the hardness of the CBN, is an excellent choice for machining harden materials in the range of 55 to over 60 Rockwell “C”.

TOWA’s own proprietary coated solid carbide endmills are offered in sizes ranging from 20mm to 0.1mm diameter, and with the same configurations as the CBN series. Specialized coatings, such as “Hard Star” is designed for finishing operation for harden steels from 55 to over 60 HRC. “ion Depo” coating allows the machining of harden steels to the 50 HRC range, and is an excellent choice for machining non-ferrous materials such as Cooper and Aluminum Alloys and Graphite.

Can’t find what you need? Towa can produce endmills of specific sizes and geometries to fit your application.

Related Glossary Terms

  • alloys


    Substances having metallic properties and being composed of two or more chemical elements of which at least one is a metal.

  • aluminum alloys

    aluminum alloys

    Aluminum containing specified quantities of alloying elements added to obtain the necessary mechanical and physical properties. Aluminum alloys are divided into two categories: wrought compositions and casting compositions. Some compositions may contain up to 10 alloying elements, but only one or two are the main alloying elements, such as copper, manganese, silicon, magnesium, zinc or tin.

  • cubic boron nitride ( CBN)

    cubic boron nitride ( CBN)

    Crystal manufactured from boron nitride under high pressure and temperature. Used to cut hard-to-machine ferrous and nickel-base materials up to 70 HRC. Second hardest material after diamond. See superabrasive tools.

  • endmill


    Milling cutter held by its shank that cuts on its periphery and, if so configured, on its free end. Takes a variety of shapes (single- and double-end, roughing, ballnose and cup-end) and sizes (stub, medium, long and extra-long). Also comes with differing numbers of flutes.

  • feed


    Rate of change of position of the tool as a whole, relative to the workpiece while cutting.

  • flutes


    Grooves and spaces in the body of a tool that permit chip removal from, and cutting-fluid application to, the point of cut.

  • hardness


    Hardness is a measure of the resistance of a material to surface indentation or abrasion. There is no absolute scale for hardness. In order to express hardness quantitatively, each type of test has its own scale, which defines hardness. Indentation hardness obtained through static methods is measured by Brinell, Rockwell, Vickers and Knoop tests. Hardness without indentation is measured by a dynamic method, known as the Scleroscope test.