Is “Jackshafts” a Scrabble word?
Yes
JACKSHAFTS
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Jackshafts
noun
1.A common mechanical component used to transfer or synchronize rotational force in a machine.
2.A wheelless axle used to turn the wheels of a locomotive.
Synonyms: countershaft