COLLOIDIAL MILL

OPERATING INSTRUCTIONS

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Colloidial Mill Risk Assessment

Colloidial Mill Photographs

Used for grinding pulps and juices
(Never used for grinding hard solids)
Consists of two grindstones, the lower one belt driven the other fixed below the feed hopper
A rotating brass plate is used to close and separate the grindstones which determines the smoothness of the finished product

Preparation for use ENSURE THE MACHINE IS SWITCHED OFF and isolated from the power supply
Loosen the three locking nuts on the brass plate
Check that the drive belt runs freely. (Grindstones not touching).
If the drive belt is not free, turn the brass plate in the direction to open the gap between the grindstones
Once the grindstones are separated make fine adjustments by turning the brass plate in the close direction until the grindstones can be felt to be just touching
Note the scale reading, on the brass plate, and rotate it in the OPEN direction by FIVE scale divisions
Note this position or even make a mark on the plate
THIS IS THE OFFICIAL MINIMUM GAP (safety control for the machine)
Lock the brass plate in this position by tightening the three lock-nuts and check for free movement

WHEN GRINDING FOOD
Switch on the motor
Release the three locking nuts and open the gap, between the grindstones wide
By turning the brass plate in the open direction and tighten the lock-nuts
Now pass through the pulp / juice - collect it as it leaves the chute
Close the grindstones in small steps, making a pass of the substance at each setting.
DO NOT CLOSE THE GRINDSTONES BEYOND THE MINIMUM GAP SETTING
When the substance is satisfactory switch OFF the machine
Remove the hopper for cleaning and wash the grindstones and chute with soapy water containing sterilising solution
Reassemble hopper making sure the red pointer label faces to the front

PROBLEMS
Food becomes jammed in the hopper
Switch OFF the machine
Use a wooden spoon handle to free the blockage
NEVER USE FINGERS

If while the motor is running, the grindstones jam together, the drive-belt is thrown off the drive-shafts
Switch OFFand isolate the machine replace the belt onto the drive shafts