Union Shell.stl (604.38 kB)

Union connector (SHELL)

Download (604.38 kB)
posted on 06.08.2020 by Adam Price, Rob Lee, Andrew Capel, Steven Christie
1/4-28" (UNF) flat bottom, female threaded straight union shell with internal core void.

The part is to be used as the rigid threaded housing for the channeled core of a straight union connector. The combined core-shell structure is to be used for unifying two separate lines of tubing via two feruled male threaded nuts. (see 'Union connector (CORE)' for core counterpart).

Part is to be printed in PLA in a horizontal orientation such that both threaded extrusions are facing outward. A 0.1mm layer height and 100% infill is required. The part can be impregnated with its PP core structure by loading both core and shell components into the slicing software, and positioning the core at coordinates X:0, Y:0, Z:1.5. and the shell at X:0, Y:0, Z:0. Once grouped (by selecting both parts, right clicking and selecting 'Group Models), the part should be raised 10mm above the build plate and a PLA support scaffold should be generated along with a 10mm PLA adhesion brim.


Loughborough University



  • Science
  • Sport, Exercise and Health Sciences


  • Chemistry


Logo branding