Company history.

1901 Establishment of Schlosserei Keller. The forge is located in a fifty square metre barn in Troisdorf.
1921 As the company is unable to properly procure gear wheels, the brothers Carl and Wilhelm Keller begin to produce their gears.
In 1936, production is expanded to include gears for the steel industry.
1968 The first gearbox to be used in surface mining is commissioned.
1971 Keller begins to produce gearboxes for
sugar factories.
1983 The product range is extended with
mixer gearboxes.
1985 Keller produces gear solutions for the cement,
chemical and aluminium industries.
2000 sees the start of development and production of gears for dredging.
2007–2009 Keller invests altogether €10 million in its machinery. The largest gear grinding machine currently in Germany starts operation.
2010 Further investment of €2 million in machinery, including among others a 6-axis machining centre