Knob for Gurdies (a mod of the Nerdy gurdy one) v3

Hi everyone,
this is another version of my knob for hurdy gurdy / nerdy gurdy.
I made the contact part with the hand palm smaller than the other two I share with you.
The reason is that in the hurdy gurdy the knob must roll in the palm. So if the knob is too big, you will not get enough room to achieve that.

I printed one in PLA filled with copper (20% metal filled) - renkfore- on a m3d printer.
no retractation at 60 mm sec. 250 microns per layer.

I was able to put the 2 608 zz Bearing (alternatively you can use in line skating bearing abec 1 to 7, for example).

I have now 3 knobs that I can test and find the best which fits to my needs.

Print Settings

Printer:

m3D

Rafts:

No

Yes

Resolution:

200 microns

10-20%

Filament: renkforce pla copper filled 20% How I Designed This

with Freecad 17.