Abstract: Methods and devices for extracting oil from oil seeds, which further include the extraction of an oil seed cake. In a preferred embodiment the oil extractor apparatus includes a steam chamber, a worm drive housing in communication with the steam chamber, a worm drive contained within the worm drive housing, where the worm drive has a first end and a second end, a driver in communication with the worm drive, and an oil seed cake thickness adjuster in communication with the second end of the worm drive, wherein the thickness of an oil seed cake is adjusted during operation of the oil extractor. Another preferred embodiment further includes a power transmission assembly comprised of a plurality of planetary gears between the driver and the worm drive.