I do not have to explain the function of this item, correct?
It is after all just another filament spool holder for people burdened with R8 bearings.
Do you have a bunch of larger bearings and don't know what to do with them?
That was my case. I have 10 each R8 bearings measuring 1-1/8" OD, 1/2" ID, and 5/16" wide.
If you have 6001 metric bearings (28x12x8), these work nicely if you scale the models (94.49%)
At 1/2" diameter, I know most printers can print a functional thread. The pitch is 8TPI and clearances are build into the rolled thread pattern. This also accounts for corner rounding and blobs. I've scaled it down for 10mm diameter bearings and the thread is still quite functional. Care to try 8mm diameter for skateboard bearings? that's beyond my curiosity.
Anyway, if you build one, show us. If you have problems with it, tells us.
These are meant to be printed with consideration of the start/stop in the upper left of the build plate. All the required parts can be nested onto a 6" x 6" build plate.
For instance, you will see a start/stop relief in the nut. Reversing the nut may cause fit issues.
In general, any build draft setting should make these prints with ease.
Ready to assembly
Be sure to notice the orientation of the plastic pieces including the nuts.
If the nut is against the bearing, there is a slightly proud layer on one side.
This is meant to face the bearing. The same is true for the side rails.
Just add R8 bearings
Breaks down quickly and adjusts easily.
Clean up anything that keeps the bearings from spinning freely. Check the nut orientation 1st. Some of the blobs left when the prints finishes may need to be knocked down.
This makes for a robust, low profile adjustable filament spool holder.
Build plate recommended orientation.
These were printed with the upper/left as the start/stop location for the layers.
These will give you an idea of what to expect:
This model was created using PTC Creo 2.0. The custom pitch and rolled threads are a highly modified UNS based implementation. In general, I am interested in 3D printing functional threads. This one hits the mark on many levels.