Retsch GM 300 - Manual (Page 34)

Accessories
34
9 Accessories
NOTE
The use of the gravity lid reduces the possible filling capacity of the grinding jar by
5 cm under the edge of the jar. This corresponds to a filling capacity of 3.5 litres.
Fig. 21: Engaging the gravity lid in the securing recess

Pull the handle upwards before inserting the gravity lid.

Turn the gravity lid to engage the lid (SD).

Put the gravity lid onto the grinding jar.

Insert the grinding jar with gravity lid into the device.

Close the flap and start the grinding process.

Disengage the gravity lid during grinding and let it drop.
Once the mill is started, the required grinding chamber capacity changes due to the
circulating effects and centrifugal forces etc. acting on the now liquefied grinding
stock. The gravity lid moves as well and in this way constantly optimises the
grinding chamber.
However, this works only with products which have a high water content.
SD