دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a hard-metal projection that is placed on the end of the pilot pin of a roller cone bit to absorb some of the wear created by outward thrusts as the bit rotates.

n: the machined extension on the very end of the bearing pin that fits into the nose of the cone of a roller cone bit.

n: the extended part of shaft neck of cone bit, coordinated with conr taper top.

n: The thrust bearing located at the hard faced shoulder of the pilot pin.