Changing the disc

There are two methods in changing a disk.
somewhere on the machine you will see an arrow showing you
the direction the disk travels when being used, the nut that holds the disk
on always undoes opposite to this.

normal method

unplug grinder, use the 2 spanners supplied with the grinder.
one will look like a normal spanner but thinner, this goes on the nut over the disk.
the other spanner has 2 nodules which fit in the holes on the nut under disk.
whilst holding the disk stationary with the thin spanner, rotate the noduled spanner
in the oposite direction to the disk rotation when being used.
on some models of grinder, a button on top of the grinder must be
pressed in, this stops the rotation of the disk when replacing disk.
This button performs the same function as the flat spanner.

emergency method

If you cannot find or have lost special spanner(s)
pushing the palm of your hand firmly onto the disk surface and rotating
the disk with a sudden **** in the opposite direction to that when being used
may loosen the nut. if the nut is tight hold the disk firmly and use an old
screwdriver in one of the holes and tap nut loose with a hammer on screwdriver.
last resort........if possible break the disk using pliers and remove all pieces.

putting a new disk on is opposite to method that you used to remove one.