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I'm new at 3D Printing. I made a model of what I want to print using blender, but it's really small with a little system that must be very precise to work.

What I have is like a hollow cylinder with a diameter of 11mm, and a thickness of 1mm. This goes inside a counter part, that is carve with the cylinder shape, but with a little extra gap so it can rotate like an axis. Maybe this picture explains better:

enter image description here

And this should be the front view of the counter part:

enter image description here

So, I need to know if it's possible to print that cylinder hard enough to work as an axis. And what should be the gap size between the cylinder and the counter part's hole to rotate properly? If it's is like 0.05mm, can I print that level of detail with a 3D printer too?

What hardware and material should I use to do this?

Thanks in advance. Sorry for bad english, I hope you understand!


enter image description here

(6mm is the depth of the hole)

1 Answer 1

It is considered good practice to limit your post to one question at a time. The question about hardware and material is too broad to be a good question and I will set that aside.

Equally unfortunate, your drawing is ambiguous. I suppose if English is not your native language, I'm not helping things either.

The drawing has some errors that make it challenging to be certain of a correct answer, but I can provide you with some useful information as a direct result of a test print created today.

The test print for my printer creates a series of spool shapes within retainer shapes. More complex than a simply cylinder making the test that much more difficult.

My printer is able to print without problem parts that are 1.0 mm apart, 0.8 mm apart and 0.6 mm apart. The test failed at the 0.4 mm spacing and the 0.3 mm spacing, telling me that I need to perform some tuning.

Your question asks about 0.05 mm spacing. I think you will not find an FDM printer that will manage such separation without bonding together the individual components. FDM printers use filament.

You may also not find that an SLA or DLP printer can provide such tight tolerances. It is the most likely source of a success, however. I have only minimal exposure to tolerance in this type of printer. SLA/DLP printers use lasers/light and liquid resin. They can accomplish 0.05 mm layer thickness, even as small as 0.025 mm layers, but I do not know the figures for horizontal precision/accuracy/tolerance.

SLS printers use a nylon powder and a laser to fuse the powder together to form the model. My SLS printer uses 0.050 mm powder. To accomplish the separation you require would mean a single layer of powder will separate the individual segments of the model. This is not practical for this type of printer.

Your best bet would be to consult with a 3D printing service that uses SLA printers. SLA is likely to be more precise than DLP due to the method of exposing the resin, although that is not a universal truth.