Centering cone | Article about centering cone by The Free Dictionary
centering coneA short plastic or metal cone used to align a 5.25" floppy disk to the drive spindle. It is inserted into the diskette's center hole when the drive door is closed.
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References in periodicals archive
In addition to the piloted cutter, the driving handle has a nylon centering cone
held in place at the muzzle by a spring.
The wipers rely on two centering cones
to keep clearance between wiper lip and rod--and, thereby, wiper pressure--uniform around the rail.