What does tappet mean?
A tappet is a small metal or plastic piece that operates a valve or lifter in an internal combustion engine, or a lever or pedal that operates a mechanism, such as a bellows or a pump. The term is often used interchangeably with 'valve lifter', but 'tappet' specifically refers to the small metal or plastic piece that operates the valve. Tappets are typically used in internal combustion engines, but can also be found in other mechanical systems. The engine's tappets need to be replaced after 100,000 miles to maintain optimal performance. In other contexts, a tappet can be used to control the airflow in a bellows or pump. The tappet on the bellows was used to control the airflow. Tappets are an essential component of many mechanical systems, and their proper functioning is crucial for optimal performance.
A small metal or plastic piece that operates a valve or lifter in an internal combustion engine.
"The engine's tappets needed to be replaced after 100,000 miles to maintain optimal performance."
Tappets are typically used in internal combustion engines, but can also be found in other mechanical systems.
A lever or pedal that operates a mechanism, such as a bellows or a pump.
"The tappet on the bellows was used to control the airflow."
Tappets are typically used in internal combustion engines, but can also be found in other mechanical systems.
"The engine's tappets needed to be replaced after 100,000 miles to maintain optimal performance."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of tappet
The word 'tappet' is derived from the Old French word 'taper', meaning 'to tap' or 'to strike'. This word is also related to the Latin word 'tappere', meaning 'to strike' or 'to tap'. The term 'tappet' has been used in English since the 15th century to refer to a small metal or plastic piece that operates a valve or lifter in an internal combustion engine, or a lever or pedal that operates a mechanism, such as a bellows or a pump.
Usage notes
Tappets are typically used in internal combustion engines, but can also be found in other mechanical systems. The term is often used interchangeably with 'valve lifter', but 'tappet' specifically refers to the small metal or plastic piece that operates the valve.