Hey Guys,
Sorry I moved the model around. I edited the original post to include the correct link.
@JACANT
Actually at small diameters under M6 these will not come out at all, and for larger diameters they will only come out if they are in a vertical orientation which we can't guarantee. They won't come out at larger diameters at other than vertical orientation because they will get squished during sintering. Here is a picture of two M8 screws, on the left printed vertically and on the right printed horizontally - note the one on the right is squished, and will not fit in an M8 hole.
That's why I recommend an extra large pitch ACME thread for any threads to be sintered. Having a large pitch and trapezoidal threads (importantly, thread spacing > 0.5mm and thread size > 0.5mm and resulting pitch >= 1mm) and loose engagement means the squishing will not make a difference in threading the piece. Actually many of those thread styles will work as well as ACME, as long as the pitch and thread size is suitable ( so for small diameters, a standard pitch / thread size particularly will not work and you'll have to adjust accordingly)
Last edited: Feb 22, 2013