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main shaft

American  

noun

Machinery.
  1. the principal shaft of a motor, transmission, etc. (distinguished from jackshaft).


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.

The main shaft is protected by a 50cm-thick, seven-tonne door made of flame-resistant concrete and reinforced with steel.

From BBC • Oct. 25, 2025

Rescuers were attempting to clear cages, skips and other debris blocking the main shaft while drilling other shafts for communication, ventilation and possibly to lift workers to the surface.

From Seattle Times • Jan. 20, 2021

But the depth of the water in the mine’s main shaft has prevented them from exploring the tunnels.

From Washington Post • Jan. 10, 2019

Energy Fuels also owns the Grand Canyon mine, where groundwater has already flooded the main shaft.

From New York Times • Jan. 13, 2018

Zooey was sitting in the main shaft of sunlight in the room.

From "Franny and Zooey" by J. D. Salinger