This mHct microhematocrit carrier is designed to hold 75mm capillary tubes for use in a centrifuge accommodating standard 15mL tubes. It's an improvement on the design included with the USA E8 Combination Centrifuge (whose original carriers appeared to also be 3D printed).
Design features
Fully enclosed carrier for tube stability
Identification dots for each slot (1, 2, 3, 4)
Chamfers and top grip for easy handling and operation
Printing instructions
Select a material appropriate to your usage.
Print the .stl file as oriented (open end on the build plate).
Operational and safety notes
Follow all manufacturer directions for the operation of your centrifuge.
The fully enclosed construction, and the FFF process, makes it difficult to clean. Please develop appropriate cleaning/reuse procedures as needed based on your usage.
Other notes
I designed this model in OpenSCAD and it's fully parameterized. If you'd like a simple modification (i.e., tube size, external dimensions), send me a message and I'll see what I can do.