How do you put on the grain mill attachment?

From what I know about these and industrial Hobart mixers is that where drive gears are on a shaft they are held by a shear pin that goes right through the gear and the shaft. They are made to shear if the grinder or planetary head is strained. It shears the pin instead of damaging the motor or shredding gears. When they do shear, there is often enough friction to turn the attachment, but not enough force under load. I see two shear pins in this diagram 19/8 and part 14/8. The diagram also show the orientation of bevel gears.

https://www.google.com/search?q=olympus+s924+manual

A Moulinex Coffee Mill might be a better solution for grinding wheat.

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Electric grain mills were not designed to grind up oily grains like coffee, you would be better off getting either a hand grinder or a coffee grinder.

Most of the mills that you will see on sites like amazon are hand mills but I found the Nutrimill to be a really amazing machine mill, its quiet and quick and has many different settings. EQUIP Nutrimill Grain Mill Amazon com Kitchen Dining

You can although I have found that the coffee grinder doesn't mill the grains down to a fine enough powder for making flour though.

Kitchenaid has a metal attachement that you can get for your stand mixer, it just screws onto the front.

Will it grind any wheat? I had a similar problem with the wheat overwelming the drive system and had to use smaller amounts of wheat to keep the system grinding. Do you have the feeder attached? I couldn't just load it up but had to feed a little at a time. Hope it helps. Favorable comments are apprieciated.

That would be incorrect. If the attachment is for a hobart kitchenaid mixer then it will fit all models of kitchenaid mixers including the brand new pro series because the attachment port and drive gear has not been changes since 1925 or 6 when it was first introduce by the Hobart company.