| 1921 |
浜井次朗 浜井工業所（個人）を創立 |
| 1921 |
Jiro Hamai founded HAMAI Manufacturing Works, a private company. |
| 1936 |
「精密ホブ盤」の試作に成功 |
| 1936 |
Successfully produced a prototype High Precision Gear Hobbing Machine. |
| 1938 |
株式会社浜井機械器具製作所を設立 |
| 1938 |
HAMAI Machine and Tool Mfg. Works. Ltd. was established. |
| 1946 |
商号を浜井産業株式会社に変更 |
| 1946 |
Corporate name was changed to HAMAI CO.,LTD. |
| 1952 |
Started production of Gear Testing Machines.v |
| 1954 |
「平面ラップ盤」の生産を開始 |
| 1954 |
Started production of Flat Lapping Machines. |
| 1957 |
Started production of precision gears on Swiss Reishauer Gear Grinders. |
| 1963 |
東京証券取引所・市場二部へ株式上場 |
| 1963 |
大阪営業所を開設 |
| 1963 |
Was listed on the Tokyo Stock Exchange Second Section. Osaka Branch Office was opened. |
| 1964 |
「全自動精密ホブ盤120A・40A」の生産開始 |
| 1964 |
Started production of Full Automatic High Precision Gear Hobbing Machines Models: 130A and 40A |
| 1965 |
日本工作機械第一グループ（JMD）結成に参加 |
| 1965 |
Joined the Japan Machine Tool Builders Dai-ichi Group (JMD). |
| 1969 |
足利工場・第一期工事完成 |
| 1969 |
Completed first phase of Ashikaga manufacturing facility plant project. . Started production of Production Milling Machines under license agreement with Hitachi Seiki Co., Ltd. |
| 1971 |
足利工場・第二期工事完成 |
| 1971 |
バトラー社との技術提携により「中ぐりフライス盤」の生産開始 |
| 1971 |
Completed second phase of Ashikaga manufacturing facility plant project. Started production of Boring and Milling Machines under license agreement with Butler, England. |
| 1974 |
本社社屋竣工 |
| 1976 |
「高速強力ホブ盤SPシリーズ」の生産を開始 |
| 1976 |
「立形マシニングセンタMCシリーズ」の生産を開始 |
| 1976 |
Started production of the SP series High Speed High Power Hobbing Machines. Started production of the MC series Vertical Machining Centers. |
| 1978 |
「ラム形NCフライス盤MACシリーズ」の生産を開始 |
| 1978 |
Started production of the MAC series Ram type Milling Machines. |
| 1980 |
米国P＆W社とOEM生産を開始 |
| 1980 |
足利工場・第三期工事完成 |
| 1980 |
Started OEM production for P&W, USA. Completed second phase of Ashikaga manufacturing facility plant project. |
| 1982 |
「立形マシニングセンタ3VA・5VA」 |
| 1982 |
「NC倣いフライス盤シリーズ」の生産を開始 |
| 1982 |
Started production of Vertical Machining Centers 3VA, 5VA, and NC Copy Milling Machines. |
| 1983 |
「横形マシニングセンタ3HA」の生産を開始 |
| 1983 |
Started production of Horizontal Machining Centers Model: 3HA. |
| 1984 |
北関東営業所を開設 |
| 1984 |
「平面ラップ盤18BF」の生産を開始 |
| 1984 |
Opened Kitakanto Branch Office. Started production of Flat Lapping Machines Model 18BF. |
| 1989 |
西独リーブヘル社と歯車機械に関する技術提携契約を締結 |
| 1989 |
Concluded a technical license agreement on Gear Hobbing Machines with LIEBHERR, Germany. |
| 1993 |
「平面ラップ盤22BF, 24BF, 28BF」の生産を開始 |
| 1993 |
Started production of Flat Lapping Machines Models 22BF, 24BF, and 28BF. |
| 1994 |
「平面ラップ盤16BF, 32BF」の生産を開始 |
| 1994 |
Started production of Flat Lapping Machines Models 16BF, and 32BF. |
| 1998 |
「16インチウエーハ対応研磨装置」の生産を開始（スーパーシリコン研究所に納入） |
| 1998 |
「片面ポリッシ盤HS360」の生産を開始 |
| 1998 |
Started production of Polishing Machines for 16\" wafers (Delivered to SSI). : Started production of Single-sided Polishing Machines Model HS-360. |
| 1999 |
「CNCホブ盤N60」の生産を開始 |
| 1999 |
「超精密ラップ盤16BN」の生産を開始 |
| 1999 |
Started production of CNC Hobbing Machines Model N60. : Started production of Ultra-Precision Flat Lapping Machine Model 16BN. |
| 2000 |
「超精密ラップ盤24BN・32BN」の生産を開始 |
| 2000 |
「片面ラップ盤HS-470／630／840」の生産を開始 |
| 2000 |
ISO9001認証（LLOYD'S, JAB, UKAS） |
| 2000 |
Started production of Ultra-Precision Flat Lapping Machines Models 24BN and 32BN. : Started production of Single-Side Lapping Machine Models HS470/630/840.. : Obtained ISO9001 certification(Lloyd's, JAB, UKAS) |
| 2003 |
「超精密ラップ盤・ポリッシ盤46BN」の生産を開始 |
| 2003 |
Started production of Ultra Precision Lapping and Polishing Machine 46BN |
| 2005 |
「CNCホブ盤N80」の生産を開始 |
| 2005 |
Started production of CNC Hobbing Machine N80 |
| 2006 |
メンテナンス子会社 ハマイエンジニアリング株式会社設立 |
| 2006 |
高速高精度加工「CNCホブ盤N40」の生産を開始 |
| 2006 |
Established Hamai Engineering Co., Ltd., a non-consolidated subsidiary for maintenance services. |
| 2006 |
Started production of CNC Hobbing Machine N40 |
| 2009 |
スイス・シュナイダー社とホブカッターに関する販売提携契約を締結 |
| 2009 |
Concluded a sales agreement on hobbing cutters with Schnyder SA, Switzerland |
| 2010 |
「片面ポリッシ盤HS1200」の生産を開始 |
| 2010 |
Started production of Single-Side Polishing Machine HS-1200 |
| 2012 |
中国上海に現地法人 哈邁机械商貿（上海）有限公司設立 |
| 2012 |
「研削盤GRD16」の生産を開始 |
| 2012 |
ISO14001認証（LLOYD'S, JAB, UKAS） |
| 2012 |
Established Hamai Machine Technos (Shanghai) Co., Ltd. |
| 2014 |
富士機械製造株式会社（現株式会社FUJI）とモジュール型生産設備「DLFn」のホブモジュールを共同開発 |
| 2016 |
「精密両面研削盤HLG-9」の生産を開始 |
| 2020 |
『東京の長寿企業70社』（日刊工業新聞社）に掲載される |
| 2020 |
Introduced on a book, “The Companies with a Long History in Tokyo.” |
| 2025 |
MBO（マネジメント・バイアウト～経営陣による買収）により上場を廃止し、非公開企業となる。 |
| 2025 |
Became a private company through a management buyout (MBO). |
