Tevo Extruder Internal Guide

thingiverse

The purpose of this part is to make loading Filament easier. It does help but you still need to straighten the filament some and cut it at a 45. I make two 45 cuts. While this part reduces the number of places the filament can snag it can still be a hassle to load. I used PLA with 100% infill. Since you want the part to be accurate, I printed it at 40 mm/s, with a layer height of .1mm and standing on its end. Although Simplify didn't think any supports were needed, I put a column under each of the two corners. After printing it will need a little cleanup. Cut off the imperfections and ream/drill out the hole to make it clear. I used a 3/32 drill and turned it by hand. Then I used an Xacto knife on the input end of the hole to make sure it was clear and to give it a TINY chamfer. In a perfect world there would be threads on the end instead of ribs, but they are a pain to draw, and I doubt the printer could resolve their tiny size. I was pleased that they did a good job of forming threads. If the coupler is taken on and off many times the threads may fail. Mine did but I had used it for a few years. If you like the way it works, print up a spare.