| 1927 |
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- Foundation of RHEWUM GmbH, Rheinische Werkzeug und Maschinenfabrik in Remscheid, emanated from the Alexander Gassinger & Co. AG
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| 1930 |
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- RHEWUM moves to its today's address, Rosentalstrasse in Remscheid. Extension of the product portfolio of tools and devices, pressing, punching and cupping tools.
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| 1936 |
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- RHEWUM became a supplier of aircraft industry because of its experience in aluminium handling.
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| 1947 |
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- After the Second World War RHEWUM started manufacturing storm lanterns and cooking pots with its existing machinery devices. Rhewum storm lanterns are highly requested collectibles today.
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| 1950 |
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- Production start up of the first magnetic screening machine.
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| 1967 |
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- Dispatch of the 1000. RHEWUM screening machine.
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| 1968 |
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- Foundation of AMBAU GmbH, Anlagen- und
Maschinenbau, a subsidiary company of RHEWUM, supplying in the field of sand, gravel and split.
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| 1970 |
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- First patents for WAU screening machines – today an often imitated standard in screening technology.
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| 1971/72 |
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- Construtction of a new workshop for steel plates.
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| 1975 |
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- Dispatch of the 2000. RHEWUM machine.
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| 1982 |
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- Construction of a new administration building by Prof. Radtke, Wuppertal.
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| 1985 |
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- Dispatch of the 3000. RHEWUM machine.
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| 1994 |
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- Dispatch of the 4000. RHEWUM machine.
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| 2000 |
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- Assignation of a patent for a multiple torque drive for a directly excitated screening machine.
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| 2003 |
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- Start up of the cooperation with Dataschalt GmbH in the field of optical sorting and of the enhancement of the existing software.
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| 2004 |
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- Dispatch of the 5000. RHEWUM machine.
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| 2005 |
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- Start up of sales of the SizeChecker, an optical online measurement device to scale shape and size of particles which can be implemented directly into materials handling processes.
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| 2008 |
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- Successful commissioning of the first Datasort processing rock salt in deep mining.
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| 2008 |
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- Assignation of a patent for a screening machine with integrated cross-flow sifter
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