Test Tube Rack

thingiverse

I designed a fun science set for my nieces because I couldn't find a decent test tube rack, so I created one that can easily hold 10 (17mm x 100mm) test tubes. The pieces fit together tightly when printed as PLA. Print Settings: Printer Brand: Robo 3D Printer: R1 ABS + PLA Model Rafts: No Supports: No Resolution: 0.2 Infill: 0.25 Notes: With PLA on a medium setting and a print speed of about 60mm/s, the pieces form a tight fit that shouldn't require glue. ABS might need some modifications due to shrinking. Post-Printing: Example PLA print with 10 17mmX100mm test tubes being held Example print - I added a custom name on the side for my niece Assembly: The two long pieces with holes (top & middle) will have their tabs inserted into the top two slots of each of the short pieces (side pieces) that have the three rectangular holes that match the tabs. Note that the holes and tabs are not centered, so match up the edges to ensure everything lines up - also the tabs will protrude when fully inserted (see photos). The tabs of the last long piece, without holes (bottom piece), go in the bottom slots of the short pieces and form a shelf to prevent the test-tubes from falling out if picked up.