muley axle

from The Collaborative International Dictionary of English v.0.48

Muley \Mu"ley\, n. (Sawmills)
   A stiff, long saw, guided at the ends but not stretched in a
   gate.
   [1913 Webster]

   {Muley axle} (Railroad), a car axle without collars at the
      outer ends of the journals. --Forney.
      [1913 Webster]