Shortly thereafter, Delta tools were labeled Delta Rockwell. Delta Manufacturing became Rockwell's Delta Power Tool Division. About the same time Rockwell also purchased Crescent Machine Co. In 1945, Delta was sold to Rockwell Manufacturing Co., originally known as Pittsburgh Equitable Meter and Manufacturing Company created in 1927 by the merger of two meter companies (which relocated to Brooklyn in 1941). In 1942, Marshall Field and partners sold it to Timken Detroit Axle Co., part of an early conglomerate controlled by Willard Rockwell. Tauco label from a scroll saw that was exported to South Africa

We are uncertain of the ownership of Tauco and it is possible that it existed before the 1939 Marshall Field buyout. The Delta name was difficult to trademark in other jurisdictions so the Tauco name was used instead. Campbell Stuckeman Tautz went on to run TAUCO Export Corp., which rebadged and sold Delta products overseas. In 1939, Tautz sold the company to a partnership consisting of Marshall Field, Charles G. A Period of Ownership Changes and Acquisitions as 'a subsidiary of Delta Manufacturing Co.' In early 1932 the 'Delta Specialty Co.' name was dropped. Beginning in 1929, Tautz started identifying Delta Specialty Co. In the late 1920s and into the early '30s, Delta rebadged a 12' bandsaw made by Heston & Anderson. The saws were sold through a subsidiary, Delta Specialty Co., and wore the 'Delta Specialty Co.' name. In 1923 he started manufacturing a small scrollsaw based on a design licensed from its inventor, Carl Moberg. In 1919, Herb Tautz started Delta Manufacturing Company in his garage. From the early 1920s, Delta Specialty Co.'s 'American Boy' scroll saw.

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