A jacking gear (also known as a turning gear or barring gear) is a device placed on the main shaft of an engine or the rotor of a turbine. The jacking gear rotates the shaft or rotor and associated machinery (such as reduction gears and main steam or gas turbines), to ensure uniform cool-down.
A jacking gear (also known as a turning gear or barring gear) is a device placed on the main shaft of an engine or the rotor of a turbine. The jacking gear rotates the shaft or rotor and associated machinery (such as reduction gears and main steam or gas turbines), to ensure uniform cool-down.
Source: Wikipedia "Jacking gear" · CC BY-SA 4.0
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