The present invention relates to a method for forming a blank railroad
spike using a series of cold forming dies. A workpiece is introduced into
a first die to form a first stage spike having a squared end and a thick
cylindrical shank. The first stage spike is introduced into a second cold
forming die to form a second stage spike in which a lower portion of the
shank is decreased in diameter, while a upper portion of the shank
maintains the same diameter as in the first stage spike. The second stage
spike is introduced into a third cold forming die to form a third stage
spike in which the upper portion of the shank is compressed to form a
collar for the spike. The blank spike is subsequently introduced into a
thread cutting apparatus to form the finished threaded spike.