The company was founded in 1922.
Ludwig Hunger developed adjustable hand reamers with an innovative cutting geometry, which continue to be highly regarded by industry experts today for their exceptionally smooth cut.

Starting in 1950, tools and machines for automotive engine reconditioning were developed.

An outstanding pioneering achievement was the valve seat turning equipment, which bores out valve seats progressively from the inside out with a fine cut.
Back then, the industry coined the term “to hunger valve seats.”
Starting in 1970, tools and machines for the reconditioning of large diesel engines were developed in close cooperation with a leading large engine manufacturer.

Over the past decade, turning lathes for boring out valve seats of large diesel engines in particular have undergone continuous advancement.
With the modular VD4E lathe, valve seats can be machined, valve seat bores turned, sealing surfaces faced, and conical surfaces on the valve cage reconditioned.
Since 2010, we have also supplied cylinder liner honing machines, injector test benches, and high-pressure hydraulic power packs.