Bourn & Koch, Inc.

They arrive, like the machine at the left, at Bourn & Koch, tired and worn out, with parts missing, gear transmissions stripped, stroke mechanisms frozen in place, incapable of shaping a gear to any class of accuracy. Fifty years ago, when they were new they made good gears, large externals and internals, with reasonable productivity. The old 36-6's required the operator to calculate a set of change gears, install a guide if the gear was helical, set the feed rate, select the stroking rate through the stroke transmission gears, set the stroke length and stroke position and set the number of cuts.