Millers Falls No.1, 3 & 5 eggbeater drills
Type Study
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Craftsman-marked, Millers-Falls-made No.1071 eggbeater drill; 
Type 15A - Make & model number stamped near the hub on the straight-sided crank. Thickly lacquered, mahogany-stained main handle, much fatter than the former rosewood main handle. Side handle is the late, Chef's Hat design and threads into a steel insert in the frame.  The Star pattern, protected-spring, 3-jaw chuck has a long, boat-tail body.  The insert faintly shows that there are no exposed springs inside the chuck for any bit to damage.  The gear ratio of 66/14 is unique to this model.  The castings of the gear wheel and frame are reminiscent of the Goodell-Pratt Company's eggbeater drills.  The usage of the protected-springs chuck, whose patent expired about 1913, and the different casting designs suggest that this drill was made under contract to Sears, Roebuck & Company after the acquisition of Goodell-Pratt by Millers Falls.  Found at the PATINA tool show, March, 2005.  I have not attempted disassembly of this drill, but I suspect that there are ball bearings inside the frame to handle the spindle thrust.
Craftsman 1071 drill made by Millers Falls Type 15A