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.

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Etymology

Origin of pitch line

First recorded in 1790–1800

Example Sentences

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

The pitch line is thus determined in Fig.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

The pitch line is then drawn at a radius of 1.606 of the pitch from the worm axis.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua