CNC 3018 - vacuum tube and longer screw adaptor

thingiverse

I replaced a standard vacuum tube with one that has a larger upper connection to fit my tube and a longer thumbscrew adapter for easier use. For me, the original vacuum tube could not be printed correctly without supports, but mine worked perfectly fine without any support issues. This vacuum tube's upper part features the following dimensions: an outer diameter of 31.4 mm and an inner diameter of 29 mm. The thumbscrew has some tolerances; you can check the image for the values from Fusion. On my printer, I used no horizontal expansion, and the fit was perfect and tight. I printed them with a layer height of 0.28mm at 75mm/sec. Be sure to use a brim of at least 7mm on the vacuum tube to ensure it stays glued until the end. No supports were needed for my Ender3 print. These two parts are used in conjunction with the parts from this thing: https://www.thingiverse.com/thing:4080257