Hey guys already posted this on FB didn't get help there but i got some cad files that i want to print its a switch band and coulper and the alt sled what is the best filelemnt for this 3d print
If you have (access to) a machine that can print ABS, that would be a good choice. ABS is less brittle and has better impact resistance than PLA. PET is somewhere between ABS and PLA.
Downsides to ABS is that it requires a heated bed and extruder that can print at 250°C or so. IT also gives off noticeable fumes that may not be healthy.
I wouldn't print shear pins. Any issues with Z layer bonding will significantly change the shear strength. Just buy a pack of 100 from McMaster and call it a day. Toss it in with some other parts to save shipping. There are so many rocket parts on that site...
Acetone vapor treatment improves ABS layer adhesion. An enclosed print bed for the maintenance of a uniform ambient temperature does, too.One of the biggest downsides to ABS is its layer adhesion. As it is tricky to print, there is a chance the layers do not adhere well and pull apart. Due to this I would recommend PLA, Nylon or Polycarbonate.
Keep in mind Nylon and PC, are some of the trickiest materials to print.