crankpin

or crank pin

[krangk-pin]
Compare web(def 11).

Origin of crankpin

First recorded in 1830–40; crank1 + pin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for crankpin

crankpin

noun
  1. a short cylindrical bearing surface fitted between two arms of a crank and set parallel to the main shaft of the crankshaft
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012