Swivel Trays are easy prints but there are a number of things to be aware of before you get started...
The clearances applied in the design are small do not scale down or the parts may not be able to be assembled and threads will be too tight to screw together.
These prints require am accurate / precise machine to ensure the rounded parts work well together and threads screw together easily.
A small amount of clean up may be required post printing (Refer post printing and images for details)
Assemle your Swivel Trays
Assembling your Swivel Trays is easy but before you do check the parts fit together well and run smoothly / freely. Because of the 3D printing process small pieces of filament and marks left by the extruder may need to be cleaned away / smoothened out to achieve this but it shouldn't be a big job.
The clearances applied are quite small. However, as not all machines print the same they may still be on the loose side for some people and tight for others, It is recommended to print a small tray and bolt first to check the tolerances before printing lots of trays and bolts.... that way you can uniformly scale up / down a fraction if required to achieve a snug but smooth swivelling fit.
If necessary you can also lightly sand or file the surfaces used in the swivelling to clean / smooth them. Applying a small amount of a light (silicone dry) lubricant is recommended as this always makes movement smoother and easier than dry plastic on dry plastic.