Dec
1913 |
|
Kagoshima Electric Railway Co.,
Ltd. started to manufacture artificial abrasives for the
first time in Japan. |
Jun 1917 |
|
Mitsui Mining Co., Ltd. succeeded the business
of the abrasives department. |
Jun 1927 |
|
Meguro Laboratory (Tokyo) of Mitsui Mining
Co., Ltd. started manufacturing grinding wheels. |
Aug 1933 |
|
New grinding wheel manufacturing plant constructed
on the premises of the Meguro Laboratory. |
|
|
Regular operation started. |
May 1950 |
|
Following dissolution of the zaibatsu, company
name changed to Kamioka Mining Co., Ltd. |
Dec 1952 |
|
Company name changed to Mitsui Mining and
Smelting Co., Ltd. |
|
|
The plant became Meguro Grinding Wheel Plant
of the company. |
May 1963 |
|
Technical tie-up for gear honing grinding
wheels agreed with National Broach of USA. |
Nov 1968 |
|
Due to lack of space at Meguro Plant, relocation
to Musashi Industrial Park in Iruma-shi, Saitama started. |
Jun 1973 |
|
Removal of plant completed, creating the
newest & most
powerful plant in the industry. |
Mar 1974 |
|
Spun off from Mitsui Mining and Smelting
Co., Ltd. to become an independent company. |
|
|
Mitsui Grinding Wheel Co., Ltd. established. |
Apr 1976 |
|
CBN Wheels and Diamond Wheels began to be
marketed. |
Mar 1990 |
|
Technology transfer contract signed with
Dongil Co., Ltd. of Korea. |
| Apr 1990 |
|
Diamond pellet business transferred from
Mitsui Mining and Smelting Co., Ltd. and operation started. |
| Nov 1994 |
|
Mitsui Grinding Technology (Thailand) Co.,
Ltd. established. |
| May 2001 |
|
ISO 9001 certification acquired. |
| Dec 2004 |
|
Expanded MGT Thailand plant. |
| Mar 2005 |
|
Certified for wide-area industrial waste
disposal. |
| Mar 2006 |
|
ISO 14001 certification acquired. |
| 2007 |
|
OHSAS18001 certification acquired. |
