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Outline

The Machine Tool Division manufactures various machine tools, precision cutting tools, auto parts(engine valves and transmission parts), and power transmissions at its main plant at Ritto in Shiga Prefecture, the Kyoto plant, and the Iwatsuka plant(Nagoya). The Division has accumulated technologies highly praised in and outside of Japan, as a pioneer in the Japanese Machine Tool Industry. It Division aims to reach the maximum limits for productivity, accuracy, and performance. The sundry products manufactured meet the diverse requests of customers and supply industry with the very best machines and services for machining  processes. Foremost among the precision cutting tools produced in the Division is the world's first dry cutting hob capable of that completely dry cutting, available since 2002. The Division is a total manufacturer of gear cutting tools, renowned worldwide for its versatile skills in the production of both precision cutting tools and gear cutting machines, and for the outstanding new products it develops based on its extensive experience. In May 2005, MHI established Mitsubishi Heavy Industries India Precision Tools, Ltd., a production base for precision cutting tools expected to increase MHI's share in Indian and other overseas markets. The Division began producing engine valves for the Zero Fighter, and now it produces valves mainly for automobiles. The technical expertise and quality capabilities cultivated by the Division through years of experience are prized in both domestic and overseas markets. As part of an ongoing expansion in overseas deployment, the Division began producing engine valves with MHI's Chinese joint venture partner, Shenyang Aerospace Xinguang Mitsubishi Heavy Industries Engine Valve Co., Ltd., in April 2005. The Division uses its gear cutting machines to mass produce transmission parts and power transmissions. The technologies acquired through operations are used to develop transmission parts, pwer transmissions, and machine tools.

 

Site (m2)

Building (m2)

Employees

Main Plant

354,200

69,920

823

Kyoto Plant

14,600

9,200

6

Iwatsuka Plant

14,202

14,202

86

Total

383,002

93,322

915

 

Large Machine 210 units
Special-purpose machine 100 units
Gear cutting machine, Cylindrical grinding machine 720 units
Precision cutting tools 55,000 pcs
Engine valves 43,000,000 pcs.
Transmission parts 800,000 pcs.

Power transmissions

30,000 pcs.

MP Scale 7,800 pcs.

 

 

Hiroshima Plant

1939

Toyo Kikai Company was establishied and started  manufacturing lathes at the Hiroshima Plant.

1943

Toyo Kikai Company was renamed Mitsubishi Machine Tool Company.

1945

Mitsubishi Machine Tool Company was merged into Mitsubishi Heavy Industries, Ltd. and Hiroshima Plant was renamed Hiroshima Works.

1982

Hiroshima Machine Tool Works under direct authority of Mass-Production Headquarters was establishied.

 

Ritto/Kyoto Plant

1944

Former Mitsubishi Heavy Industries, Ltd. started production of aircraft engine valves at Kyoto Machinery Works(Uzumasa).
It started
production of aircraft engines at Kyoto Engine Works(Katsura).

1970

Mitsubishi Heavy Industries,Ltd. separated the Automobile division and renamed its plant Kyoto Machinery Works.

1983

Ritto Plant was constructed in Ritto, Shiga prefecture in Japan.

 

After integration

2000

Kyoto Machinery Works and Hiroshima Machine Tool Works of Mitsubishi Heavy Industries, Ltd. were integrated and  renamed Machine Tool Works.(Jan.)
Machine Tool Division was established to integrate production and sales operations.(Apr.)

2003

No.2 Machine Tool Plant was constructed. Hiroshima Plant was moved and integrated into Ritto Plant.

2004

Mitsubishi Heavy Industries Machine Tool Sales Co,Ltd. was established as a dedicated machine tool sales subsidiary in Japan(Apr.).
MHI Machine Tools H.K.,Ltd. was established as a dedicated machine tool sales/service  subsidiary in Hong Kong (Dec.).

2005

Production of power transmissions was transferred from Iwatsuka Plant to Machine Tool Division(Apr.).
Mitsubishi Heavy Industries,Ltd. acquired Indian tool company S.R.P.Tools Limited.
Mitsubishi Heavy Industries India Precision Tools,Ltd. was established (May).
Shenyang Aerospace Xinguang Mitsubishi Heavy Industries Engine Valve Co.,Ltd. was established in China as a joint venture for engine valve production(Oct.).

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