Marketing of the "Unit Plan" lathes, as distinct from the company's Utility Models, was aimed at the impecunious owner could afford to start with a basic but functional lathe in non-backgeared, plain-turning form and then add, as funds became available, all the items necessary - motor countershaft unit, backgear and screwcutting attachment - to turn it into a fully-specified machine.
Based at first on the 9-inch compound V-belt drive lathes, eventually the range was offered with the swing increased to 10 inches and (if chosen) a countershaft resembling that fitted to the first of the later 10-inch screwcutting lathes. The versions available started with a basic machine, the $39.50 10A, with a plain slide rest, no rack feed along the bed and no backgear or countershaft unit (this lathe was also the basis for a new range of wood-turning lathes that were introduced by Sears, Roebuck in 1935 and sold under their Craftsman label). The $49.25 Model 10B added a complete 8-speed countershaft unit but retained the non-backgeared spindle and plain compound-slide rest whilst the $54.75 10C was, in effect the fully specified ($87.50) model less the screwcutting equipment. All types were available with between-centres' capacities of 18", 24", 30" and 36" and a choice of plain (babbit) or, at an additional cost of $18.50, Timken tapered roller bearings in the headstock
The countershaft assembly was $12.50; a rack-and-pinion drive for the carriage from $13 to $13.75 (depending on bed length);  the 10C-type compound slide $9.85; a backgear assembly $8.35 and  the screwcutting attachment with changewheel set, reversing gearbox and bracket from $12.75 for the shortest-bed version to $15.95 for the longest.
With the introduction in 1936 of the new 10-inch Atlas lathes the "Unit Plan" machines were revised to incorporated many of the same improvements but, in line with the poor trading condition of that era, at a lower price. The lathes continued the Company's tradition of offering the less-well-off owner a basic but functional lathe in non-backgeared, plain-turning form that could be added to - a motor-countershaft unit, backgear and screwcutting attachment - as funds became available. As before, the basic machine was the 10A ($35.50) with a plain slide-rest (no rack feed along the bed) and no backgear or countershaft unit  The $45.25 Model 10B added a complete 8-speed countershaft unit but retained the non-backgeared spindle and plain compound-slide rest whilst the $49.75 10C was, in effect the fully specified ($87.50) Model 10D less its screwcutting equipment. All versions were available with between-centres' capacities of 18", 24", 30" and 36". Accessory prices remained unchanged, with the countershaft assembly at $12.50; a rack-and-pinion drive for the carriage from $13 to $13.75 (depending upon the length of the bed);  the 10C-type compound slide $9.85; a backgear assembly $8.35 and  the screwcutting attachment with changewheel set, reversing gearbox and bracket from $12.75 for the shortest-bed version to $15.95 for the longest.
By 1938 the "Unit Plan" lathes had disappeared from the lists and the only cheaper option available to the hard-up enthusiast was the final 36-inch capacity version of the original 9-inch all V-belt drive lathe - a model that was to be  dropped during 1939..