The Model C
This model was a smaller version of the Model B hydraulic machine and came in 8”, 12” and 16” sizes. Model C grinders differed principally from the other models in that a motor was built directly into the wheel head for driving the wheel spindle. It was first introduced in 1936. The Model C machine was not a popular model and was obsoleted in 1954.
The Model D
This model was actually a redesigned Model C and was built in 12” and 16” sizes. It was introduced in the 1939 and not really pushed until after World War II. This model had improvements designed to obtain a high degree of accuracy and fine finish. On these models the spindle traveled, and the table remained stationary. This model was built by Arter Grinding Machine Company, Sundstrand and Centro-Metalcut, Inc. Although the Model D is obsolete, many are still in operation today. They are serviceable and most spare parts are available for this model if they can be identified.