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Denning
Explore 4 farm tractor models. Follow a model into its engine specifications, transmissions, dimensions, historical photographs, and available test records.
About Denning
J. M. Denning founded the Estherville Fence Factory in Iowa in 1893. It evolved into a tractor business before General Ordnance purchased it in 1918 and adopted the National Tractor name.
- Beginning
- 1893; motor-implement reorganization in 1912
- Founder / origin
- J. M. Denning
- Known for
- An early Iowa tractor design
- Sale / later history
- Purchased by General Ordnance in 1918
History and legacy
The business moved to Cedar Rapids in 1899 and sold its fencing patents and machinery in 1912. The later Denning-designed tractor continued under new names; a change of badge should not be mistaken for an unrelated design appearing from nowhere.
Sources & further reading
History reviewed 2026-10-20.
Showing 4 of 4 models
C
1914
33 hp
Engine estimate from belt power
2WD Only
Drive
B
1913–1915
26 hp
Engine estimate from belt power
2WD Only
Drive
E
1916–1918
20 hp
Engine estimate from belt power
2WD Only
Drive
A
1912
13 hp
Engine estimate from belt power
Unknown
Drive
Index power values can include estimates derived from belt or PTO power. They are identified on each model card and are not interchangeable with a measured engine rating. Model years and missing values follow the source index.