also: スパーギヤ · スパー・ギア · スパー・ギヤ
spur gear
A cylindrical gear with straight teeth parallel to the axis; used in mechanical engineering.
A spur gear is one of the most basic types of gears.
This machine uses spur gears.
Alternate katakana spelling using ギヤ instead of ギア.
Spelling with interpunct, sometimes used for clarity.
Rare interpunct variant with ギヤ.
Borrowed from English 'spur gear'.