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Treads to try out my own TPU filament... worked great :-)
For this proof of principle design I used long M6-threaded screws (the hubs/wheels were screwed onto them) and ball bearings. The fuselage is not in any way a good design, only a fast base to test the hubs/wheels/tread... the drive-wheel was fitted directly onto the geared-motor axis.
Different flexible filament would perhaps work, make sure its not too stretchy since it might not stay on the wheels/hubs. I used my own:
It´s 95 Shore A. It is also conductive and if you make both the hubs and thread in this material you will be able to handle the static electricity that is built up when plastic moves...
Please check out my unique UV-stable, flexible and conductive filament called ETPU 95-250 Carbon Black filament.
Don´t need the conductivity? Well the conductivity is great for some things but perhaps not your first choice? Then consider this:
This filament will give you some really nice benefits if the conductivity is not an disadvantage for your 3D printed design:
•The material composition eliminates “stringing / webbing” issues.
•The hardness of 95 shore A and the carbon black filler makes for great print abilities.
•The carbon black filler is an excellent UV stabilizer thus the prints are built to last in very harsh environments.
•The matte black surface finish has a very exclusive look.
•The material feels very nice and dry to touch.
•It´s not too stretchy and will do great for timing belts etc.
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