Another user-made drill. This one has no steadying handle; it never had one. The main gear wheel is a roughly made casting with extra reinforcement in the center, where the highest bending stresses are. The square wrought frame has prick punch marks which showed the machinist where to stop cutting while the frame was mounted in a four jaw chuck in the engine lathe. These marks brand it absolutely as a one-off effort. Production methods would require stops to be mounted on the bed of the lathe so that the machinist would not have to rely on measurements and marks directly on the workpiece. The breast plate is another well reinforced casting. The iron crank handle was turned between centers. Yet another Sanford Moss find.

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