Tungaloy Co. Ltd.

Since 1929, when we succeeded in developing Japan's first cemented carbide, called Tungaloy, Tungaloy has continued our tradition of innovative R&D, providing products that help industries grow and develop. By anticipating and meeting challenges we create vast potential for today, tomorrow, and well into the future.

Tungaloy America Inc.

Since 1987, Tungaloy America has rapidly emerged as a leader in the development and distribution of innovative cutting tool solutions for a variety of applications. Today, Tungaloy America has distribution nationwide including Mexico and Canada. The team concept has played a large part in Tungaloy America's ability to fulfill our primary objective: To provide operators with only the highest quality available, not only in the product itself, but also in the areas of customer service and product distribution.

Tungaloy History

1927 Birth of Tungaloy
The first cemented tungsten carbide alloy in Japan was developed by the predecessor of Toshiba Corp.,and named Tungaloy.

1935 TX/GX Grade
TX grade (Tantalum Carbide base) and GX (Titanium Carbide base) were developed for steel cutting.

1937 Clamped Inserts
First production of tools utilizing a mechanically fixed insert instead of a brazed insert.

1953 Triple Carbide Base Grades
TH/TX grade (WC-TiC-TaC-Ni base) were developed for cutting various materials.

1958 Tungalox
Release Tungalox™, the first cutting-use alumina ceramic tool grade in Japan.

1961 TC1/TC2 Cermet Grades
Developed Titanium Carbide base Cermet for steel cutting.

1962 Gundrill
Developed Gundrill, the first deep-hole drilling tool in Japan.

1965 Synthetic Diamond
First production of ultra high-pressure synthetic diamonds on a commercial basis.

1969 Microalloy F Grade
Developed ultra-fine grain cemented carbide Microalloy F.

1971 X407
Developed the world's first TiC-based compound carbide tool grade cermet X407.

1971 T525
Developed first CVD coated grade T525.

1975 High Rake Cutters
Developed high-rake geometry milling cutter PD8000 for steel cutting which originated the most
popular cutter design today.

1978 PCBN grades BX series
Developed first polycrystalline CBN grades BX series.

1982 PCD T-Dia grades
First development of a Polycrystalline Diamond Compact grade T-Dia.

1986 DSC Drills
Commericalized the world's first solid cemented carbide spiral oil hole drill, DSC.

1987 NS Series Cermet
Developed super tough cermet grades NS series. Toshiba Tungaloy America established.

1988 LX11 Fine-Grained Al2O3 Base Ceramic Grade
Designed for the turning of hardened ferrous materials.

1992 X-Technology
Developed the world's first X-treated dense multiple coating layer grade T725X. Developed the
world's first one-double tool-holder D-type.

1993 Columnar Crystal Coated Grades T5000 Series
Relatively thick coating layer composed of columnar crystal TiCN and micro-grain Al2O3
provides the best performance in high-speed cutting.

1996 Disk Reinforced Technology
This epoch-making invention will lead carbide material technology into the 21st century.

1997 FX105 Fine Grain Si3N4 Base Ceramic
High thermal conductivity and toughness offer excellent properties for high speed cutting of cast irons.

1999 New Coated Disk Grades TD900 Series
Our latest coating technology combined with Disk reinforced technology will offer revolutionary
tool materials.

Leading the industry into the 21st century with many new innovations to increase productivity
and improve our environment.

Tungaloy becomes independent of the Toshiba Group. Tungaloy will continue to strive to develop and supply products of high quality and performance, which promptly meet the diversified needs of our customers by coping quickly with changing times.

Main Product Fields

TAC® Inserts   TAC® Holders
TAC® indexable inserts are part of our extensive variety of tool materials of differing geometries A wide selection of TAC® inserts are available for operations ranging from turning and milling to drilling.   Lathe mounted TAC® holders can be used for many applications including turning and boring, threading grooving, and parting. We also produce modular tools for such turning applications.
Milling Tools   Drilling Tools
These tools, mounted on milling machines, are employed for tasks that include face milling, shaping, excavation, and profiling. Face-milling cutters and end mills that utilize TAC® indexable inserts are main products.   These tools are used for various drilling and hole-making operations, and consist primarily of twist drills, gun drills, and reamers etc. Our solid-type drills with spiral oilholes provide cutting point lubrication and superb performance.

On The Leading Edge

Columnar Structure Coating Engineering
Excellent mechanical strength and toughness are achieved through the application of whisker engineering to create a coating layer of Ti compound with columnar structure.
DISK Engineering (Reinforced Cemented Carbide)
This epoch-making cemented carbide was developed by forming tungsten carbides into disk- (plate-) like structure.
Cermet Sintering Engineering
These cermets greatly reduce the sudden failure during interrupt, or wet cutting, suffered by flawed conventional cermets. Our NS520, NS530, and NS540 series cermets provide high reliability and selectivity.
CBN Sintering Engineering
CBN (BX450) sub-micron particles are used in combination with a fine particle special binder for improved toughness and fine chipping prevention during cutting.

Worldwide Activities

State of the Art Facilities

Head Office


Iwaki Plant established 1989 manufactures cemented carbide, cutting tools (TAC® inserts, milling tools, micron drills etc.), and cemented carbide powder.
Nirasaki Plant established 1970 manufactures friction materials, wear-resistant tools, and cutting tools (TAC inserts).

Nagoya Plant established 1961 manufactures cutting tools (drilling tools etc.), wear-resistant tools, and machine parts.

Osaka Plant established 1943 manufactures cemented carbide, cutting tools, (TAC® holders, milling tools etc.), and machine parts.
Our four manufacturing plants in Japan, each devoted to a particular production item, are linked by an advanced logistics network that ensures a smooth flow through production, stocking, and physical distribution.