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pitch line

American  

noun

Machinery.
  1. pitch circle.

  2. an imaginary line within the profiles of the teeth of a rack, such that it moves against, and at the same rate as, the pitch circle of an engaging pinion.


Etymology

Origin of pitch line

First recorded in 1790–1800

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Scheib’s pitch line earned him a spot on the chair in pitchman’s Valhalla — next to Johnny Carson and his big desk on national TV.

From Los Angeles Times Aug. 30, 2023

And his plan was almost a total restart, including dialing down the “name your price” pitch line and switching the company’s strategy from air travel to hotel bookings.

From New York Times Dec. 17, 2014

"We had come up with a pitch line which was strong: five kids walk 3,000 miles to get to the opening of the World Cup."

From The Guardian Oct. 2, 2010

Depth of tooth below pitch line = l = ·4p.

From An Introduction to Machine Drawing and Design by Low, David Allan

The number of teeth in a gear as calculated on the pitch line.

From Practical Mechanics for Boys by Zerbe, James Slough

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