The following are common parts regarding design.
It is designed to place food for two people (approximately 20g) at a time on the top of the upper mill, but by repeating it, you can feed dozens of people without generating heat, which can cause problems such as burnt beans. (It is said that exposing coffee beans to extreme heat increases their bitterness.) Can be ground.
The diameter of the sliding surface was determined as 5.0 sun (approximately 15 cm) as a result of trial production, which is sufficient to avoid grinding too much, and the height of the upper mill was determined based on the required weight.
The lower mill has a structure in which a donut-shaped groove with a width of 8 to 9 minutes (24 mm to 27 mm) and a depth of 5 minutes (15 mm) is placed on the outer periphery of the grinding surface with a diameter of 5 inches to receive the ground powder. Masu.
There is a hole in the donut-shaped groove, and the powder ground by the brush attached to the bottom of the upper mortar falls from the groove into the hole with each rotation.
The "hole" part of the lower mill is machined to have a width of 10 cm, depth of 10 cm and height of 6 cm so that a "saucer" can be set, and the height of the lower mill is determined.