Another Spool Holder by Chalado

Last crawled date: 3 years ago

This is a remix of the famous Tush. I wanted it to be a bit more substantial so that it can carry bigger and heavier spools. With the much more emphasized base it should now also be way harder to knock over. Also the added spool racer should help the spool stay centered instead of walking around on a naked bearing.
The required bearing is a 626 (6 mm ID; 19 mm OD; 6 mm Width) since that was what I had at hand.
1) The Racer should fit the bearing nicely with a bit of force. It is easiest to place the racer on a flat surface with the opening side facing up and then press the bearing in. You can use your thumb, a piece of cardboard or whatever seems appropriate - maybe not your cat's paw as this might lead to rapid defensive action with high potential for injuries. The bearing should end up flush with the racer. If it is loose maybe scale the print down by 0,5 - 1 Percent. Likewise scale it up if it is too tight. However I think in most cases it should fit precisely. In doubt opt for a tighter fit as the bearing will be forced to bear ;) the rolling movement.
2) The bearing assembly then goes on to the shafts from part A. Push it all the way through until it touches the end stop ring. The rest of the shafts should stick out by 2 mm. This is where part B goes. If you feel that the bearing sits loose or does not fit at all, scale part A AND! B up or down according to your own estimations. maybe +-1% is a good starting point. I found that the OD of the shaft depends a bit on print temperature and cooling, haven't figured out how to get the precision on that down to .1mm yet.
3) Now slide the entire assembly down into part C and you're ready to go.
If you had to scale parts A and B up too much, a tiny bit of sanding at the ends might be required in order to fit them into the cutout in part C.
I have used the spool holder only in near vertical pulling direction up to now. If you find it slides around too much in a horizontal setup just add some tiny rubber feet on the bottom and that should do the trick (if needed at all).
If you have Ideas for further improvement just let me know. As long as my university license of inventor is valid I can make changes by the minute ;)
May your beer always be cold and sparkly
Cheers