1834 - Stedman Machine Company is Founded in Rising Sun Indiana as Rising Sun Ironworks.
1840 - Stedman moves from Rising Sun Indiana to Aurora Indiana.
1861 - Stedman is commissioned to build twelve 6lb cannon for the
Union.
1865 - The Stedman steam engine goes into peak production.
1886 - Stedman builds disintegrator #1 also known as a cage mill for Oakland Pressed Brick, in
Zanesville, Ohio.
1890 - Stedman ships its first international disintegrator to Kennedy Brick Machinery Manufacturing Co., in Liverpool, England.
1893 - Stedman is incorporated as Stedman Foundry and Machine Works.
1894 - Stedman is awarded 2 patents for the cage mill style disintegrator.
1912 - Stedman is purchased by Stuart P. Sutphin, Chester A. Peebles and Perin Langdon and moves to Cochran Indiana where it exists today.
1924- - George M. Stedman grandson of founder Nathan R. Stedman and the last Stedman to work at Stedman Machine Company retires.
1929-1940 - During the Great Depression Stedman kept the economy moving forward by producing Hammer Mills, Disintegrators, Mixers, Crushers, and screens.
1941-1945 - Stedman produces hundreds of tons of castings for the war effort including turret rings and machine tool castings.
1949 - Stedman is acquired by United Engineering and Foundry Company, Pittsburgh, PA.
1966 - Stedman completes a major machine shop expansion.
1968 - Stedman's parent company merges with Wean Industries, and Stedman becomes a Wean United Company.
1970 - Stedman builds the largest cage mill to date, a massive 60-S single cage mill weighing in at a staggering 45,000 pounds.
1980 - No longer economically feasible to continue, Stedman foundry operations are terminated.
1983 - Stedman ships the first GrandSlam
horizontal shaft impactor to Ohio Asphaltic, in Hillsboro, Ohio.
1990 - Stedman is purchased by Eagle Crusher Company.
1994 - The first MegaSlam primary horizontal shaft impactor is shipped to Ohio Ready Mix, in Forrest, Ohio.
1999 - The first Stedman V-Slam
vertical shaft impactor is shipped to OMG Americas-Apex OP, St. George, UT.
2009 - Stedman celebrates 175 years in business and is also awarded 3 patents for improvements to vertical shaft impactors.
2010 - Stedman completes a colossal 60 ton MegaSlam primary for use in an underground limestone mine.
2011 - Stedman is awarded another patent for improvements to vertical shaft impactors.
2016 - Stedman expands testing and toll processing capabilities with new facility.
2017 - Stedman introduces a new product line, the Dual Rotor Chain Mill.
2018 - Stedman introduces a new product line, the Full Circle Hammer Mill.
2021 - Nathan Parker Stedman is inducted into the Pit & Quarry Hall of Fame. ==Notes==