The Collaborative International Dictionary of English v.0.48:

Self-adjusting \Self`-ad*just"ing\, a. (Mach.)
   Capable of assuming a desired position or condition with
   relation to other parts, under varying circumstances, without
   requiring to be adjusted by hand; -- said of a piece in
   machinery.
   [1913 Webster]

   Self-adjusting bearing (Shafting), a bearing which is
      supported in such a manner that it may tip to accomodate
      flexure or displacement of the shaft.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "self-adjusting":
   automated, automatic, automatous, cybernated, self-acting,
   self-active, self-closing, self-controlled, self-cooking,
   self-directed, self-directing, self-dumping, self-governed,
   self-governing, self-lighting, self-operative, self-regulative,
   self-starting, self-winding, self-working, semiautomatic,
   spontaneous