Advance Rumely Ideal Separator, 32 x 52

Ronald Miller of Geneseo, Illinois, donated this threshing machine to the Museum in 1988. The bright red paint that covered the machine when new had faded, but wood and internal parts were in excellent shape, a testament to the care that farmers lavish upon their machines.
Smithsonian conservators decided to accept the threshing machine without restoration, and this separator threshed oats at the 1991 Smithsonian Folk Festival, pulled by a Rumely Oil Pull 20-40 tractor.
The 32 x 52 designation refers to a 32-inch cylinder and the 52-inch-wide threshing shoe. The 7-ton machine was designed to have four men pitching bundles of grain into the feeder; it could thresh over 2,500 bushels a day.
Currently not on view
Object Name
threshing machine
date made
Advance Rumely Company
Physical Description
wood (overall material)
cast iron (overall material)
steel (overall material)
red (overall color)
green, dark (overall color)
yellow (overall color)
average spatial: 118 in x 104 in x 366 in; 299.72 cm x 264.16 cm x 929.64 cm
place made
United States: Indiana, LaPorte
ID Number
catalog number
accession number
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Work and Industry: Agriculture
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Ronald Miller

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