Since the collar is made of a resin, the rigidity thereof is lower than that of a metallic sleeve, and {HEAD ~ the coefficient} of {TAIL ~ linear expansion} can be close to that of the sleeve so that the sleeve can be assembled and maintained with substantially no change in the bore precision thereof 
of
Since the collar is made of a resin , the rigidity thereof is lower than that of a metallic sleeve , and { HEAD ~ the coefficient } of { TAIL ~ linear expansion } can be close to that of the sleeve so that the sleeve can be assembled and maintained with substantially no change in the bore precision thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH