Spool Holder - any size (5kg, 2kg, 1kg, etc)

This is a simple yet robust filament spool holder designed to accommodate spools of any size, from 1kg to 5kg and maybe more. Its simple design is easy to assemble and requires minimal parts as well as not taking up lots of space when not in use.

Required parts:

• 4x 608 bearings
• 2x bases (3D print from files)
• 4x wheels (3D print from files)
• 4x axel pairs (3D print from files)

Printing:

• Material: Recommended PETG because there is a very small lip on one edge of the wheel to snap the bearing in which is pretty tight.  I haven't tried with PLA.
• Settings: 0.2 height for the wheel and axels. 0.3 height for the base.
• Wheels: Print with the visible inner lip closer to the plate. (There is another smaller one on the top side which isn't easy to find in the slicer.)

Assembly instructions:

1. Snap bearings into the wheels (requires some force, I was barely able to do it without tools). You can use parts of the axels which can help.
2. Insert axles into bearings. These are friction fit.
3. Snap assembly from step 1 & 2 into the base.
4. Done.

Design goals:

There are a lot of great spool holders on printables.com but I didn't like any of them. Some required a lot of extra hardware and some were just too big.  @3DSourcerer appears to make an excellent one but it's too big. I chose the one by @DaveyPrints85 because it was simple but it still had a few issues; 1- didn't fit spools with large flanges, 2- hold together well. So my requirements were:

• Minimal extra parts
• Use only 4 bearings
• Minimal size for when not in use

This is more like a re-design.  The base forces the axel to snap in place.  The axel is longer, wider, and holds its position which also snaps in.  The wheel is wider and allows for the bearing to be snapped in as well as accepts spools with flanges up to about 17mm thick.