After getting started with my Flashforge Dreamer and printing @BaronWilliams' OmniStands, I was able to use a wide range of 3D filament from different manufacuters. The problem was, they tended to use filament spools of varying depth and diameters.
My first attempt at a solution was printing a variety of spool adapters that would fit on the OmniStand rods (see my
Customizable Spool Adapter).
Then I got tired of keeping track of which adapter goes with which brand of filament/spool. So, I came up with the "Universal" spool adapter you see here! The ID is 20 mm, which will fit on the Omnistand rod. The OD of the hub cap varies from roughly 30 ~ 80 mm diameter, which should allow you to sandwich most 1 kg spools between them.
There are a couple of hub cap variants to choose from:
BaronWilliams' OmniStands:
I also realized after creating this, that others had the same idea! You can find similar adapters from other makers below (not an exhaustive list):