it's an tank tread/track!
the drive wheel is somewhere between my other things
the tracks are designed for 1.5 mm X 25 mm nails
my printer prints the holes smaller then the desing (that is taken into account) so if you need a version with smaller holes just send me a message with the hole diameter and i will upload it.
important noteit is possible that you need to resize the part (make it 10 times bigger) as i think there is a problem with my 3D software
i printed this with supports on my prusa I3
0.3mm layer height (i could have done it on 0.1mm but it doesn't need to be very precise)
100mm/s printing speed
after printing you should drill the holes from the 2 overhanging parts that are the closest togheter with a 2mm drill.
put 2 pieces togheter and force a nail trough the (aligned) holes.
you probably need to do this with a pair of pliers, or a small hammer.
important note it is possible that you need to resize the part (make it 10 times bigger) as i think there is a problem with my 3D software