- a sliding rod, intermittently struck by a cam, for moving another part, as a valve.
Origin of tappet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for tappet
As the tappet is struck 400 to 600 times per minute, the wear and stress is great.Expository Writing
Mervin James Curl
In these grooves slides a tappet, n, connected with the axle.
Each stamp has a tappet at the back, which requires to be daubed with grease on the lower side that it can be raised more easily.De Re Metallica
When the exhaust valve is operated by the tappet rod and rocker arm the intake valve is also carried down with it.
By an ingenious rocker arm and tappet rod arrangement it is possible to operate both valves with a single push rod.
- a mechanical part that reciprocates to receive or transmit intermittent motion, esp the part of an internal-combustion engine that transmits motion from the camshaft to the push rods or valves
C18: from tap 1 + -et
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