PrintNC T8 Riser with Nut Traps

thingiverse

I am thoroughly enjoying the PrintNC build so far, and I wanted to make a contribution by remixing the T8 riser designed by Hoges. To do this, I rotated the hole pattern for the T8 nut by 45 degrees, allowing two M3 nuts to be inserted securely in place. These two nuts completely change the intent of the original design, making it necessary for the nuts to shear through over 1cm of plastic before they fail. In contrast, the original design relied on the plastic in contact with four M3 screws to keep a heavy, rotating and vibrating spindle from dropping unexpectedly at any moment. I also reduced the diameter of the part's through hole to 8.75mm for increased strength and stability. Another excellent aspect of this design is that if you file down the two M3 screws so they make contact with the carriages, it will eliminate any possible backlash that may occur if the carriages are not perfectly snug in the T8 riser. Your print may vary based on calibration, but the flange on my T8 nut measures 3.5mm thick and has a perfect thread length for a screw in the nut trap of 17mm. I printed this piece with the big flat part facing down on the bed. No supports were required during the printing process.