Designed to be a workman-like jobbing machine able to perform a variety of tasks in a general-engineering workshop, the Garvin Model 15 Plain Miller contained all the design features common to the makers but, instead of a screw-driven table, employed a hardened steel worm that meshed directly with a spiral rack cut on the underside of the table. The arrangement, also found on Swiss-manufactured Mikron precision bench milling machines of the 1930s, was geared to give a very direct feed with one turn of the large operating handle moving the table two inches. Micrometer stops were fitted to the knee, saddle and table.

One of the largest models produced by Garvin, the 16A had a table feed of 34 inches longitudinally, 10 inches laterally and 20 inches vertically. Twin yolks were fitted to support the cutter arbor while the overarm brace was a one-piece casting that located on, and was adjustable along, the saddle ways.