What is this?
A spool holder cone that is used in pairs to hold a filament spool on a holder with a center rod.
Why did I create this?
One of my printers came with an acrylic filament holder that uses an 8mm rod to hold the spool. To ensure a smooth unspooling of the filament and a centered mount of the spool itself, I designed these spool holder cones. I tried several variations of spool cones from Thingiverse but none of these fulfilled my expectations. So I made my own.
- uses two 608ZZ bearings per cone and these bearings are the only part of the cone that comes in contact with the threaded rod
- the washers clamp only the outer ring of the bearings to the cone, allowing them to spin freely
- the small sleeve clamps down on the inner ring of the bearing so that a nut on the threaded bolt can hold the cone in place while it still can rotate freely.
How do I assemble it?
You will need
- 4x 608ZZ bearings
- 8 3x12mm self-tapping countersunk screws
- 2 pieces of each printed part
- a screwdriver for the self-tapping screws
You will need two pieces of each part for a complete spool holder. You will also need 4 608ZZ bearings.
- Insert the bearings into the recess on both sides of the cone (largest part).
- Screw the corresponding washer to each side of the cone.
- Slide the sleeve onto the threaded rod.
- Slide the cone onto the threaded rod. The side of the sleeve with the smaller diameter must face the outside of the cone.
- Put a spool on the threaded rod
- Repeat steps 4 and 3 for the other side.
- Tighten down the cones using nuts on the threaded rod.
How do I customize them?
Edit the various variables in the SCAD file to make the cones suit your needs. I did not test every possible combination of sizes and there are some basic requirements for the minimum size (e.g. you need enough cone to screw into ;-)).
I might add a Customizer-enabled version later on.
This file was initially published in my 3D-Printing Github repository.
I recommend enabling build plate supports so that the cutouts for the bearing are supported. I'd also recommend enabling interface layers between the support material and the object for a smoother surface. I use 2 interface layers in Slic3r.
This feature is called Dense support layers in Simplify3D.
In Cura you have check Enable support interface and set Support Interface Thickness to 2 layer height, e.g. 0.4mm.