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33 votes
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What glues for bonding printed PLA to injection-molded plastic?

PLA is a nice one, and gluing has been a topic on some of our most favorite maker's channels. For example Stefan from CNC kitchen (this video) and Joel the 3DPrinting Nerd (this video). Also, in 2022, ...
Trish's user avatar
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12 votes
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Water does not flow through 4 mm hole when there is a small amount, how to let water flow through small hole even when there is low pressure?

What you encounter there is a combination of Adhesion, Cohesion, and Capillary Force. Cohesion is what holds the water together. Adhesion is the force to retain water against a wall or hanging from a ...
Trish's user avatar
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8 votes

Drilling 3D-printed plastic

In addition to the good answers already given, I'd like to add: Use a sharp drill bit, and don't go too fast. Dull drill bits and fast rotation are more likely to heat up the plastic (especially PLA) ...
vwegert's user avatar
  • 466
8 votes

Good lubricants for moving parts?

When dealing with lubrication of plastics, any solvent or reactive substance is to be avoided. Petroleum is risky and Vaselineā„¢ is a brand name for petroleum jelly. I've had quite good results using ...
fred_dot_u's user avatar
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7 votes

What can I use to "sand" my ABS prints?

I use nail files. They're easy to get, cheap and have different grits on either side. You can lay them flat or hold them in your hand and they have some stability making it fairly easy to sand ...
Pelle's user avatar
  • 129
7 votes

What glues for bonding printed PLA to injection-molded plastic?

Yes Super Glue is best choice. I personally use it in many PLA projects. I even apply Super Glue layer to ABS prints to avoid layer separation. It works well with both ABS and PLA, but exercise some ...
Himanshu's user avatar
  • 301
6 votes

Prints are now sticking too well to the bed. What to do?

Options to check (in order of probability of occurenece and success): Z-calibration Maybe you should perform calibration again. It's possible that nozzle is now too close which causes the filament ...
darth pixel's user avatar
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6 votes
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Post processing FDM for strength

Recognizing that the posting party feels that FDM constructed parts are of insufficient strength for his purpose and allowing for proper layer bonding, one can understand that the model can be ...
fred_dot_u's user avatar
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6 votes

Secure disposal of 3D prints

Big batches need you to be time efficient - or use a method that uses little work. So my suggestions are mainly needing oversight. Keep a fire extinguisher and safety gear handy though! Melting ...
Trish's user avatar
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6 votes
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How could I print a large sphere-like object?

A sphere can be put together quarters easily, but those need support in the center. However, there is a slightly different cut is more economic: Cut a top and bottom "plate" off, print them ...
Trish's user avatar
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6 votes
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Sandable primer suitable for PLA?

There are generally 2 types of operation you might want to do before priming your object: smoothing to a point that you are comfy with and roughing pass with very fine grit to give the primer ...
Trish's user avatar
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6 votes

How do you remove rough edges from completed prints?

To remove unwanted residual material: You can scrape with a knife Use sand paper use files Very fine sandpaper or files can smooth out the rough surfaces left from filing or sanding. Dremel tools ...
Perry Webb's user avatar
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5 votes
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How do I give 3D-printed parts in ABS a shiny smooth finish?

Acetone can be used to smooth ABS. The left has been smoothed by an acetone bath and the right is the original model. (Image credit: Andrew Sink) Take note: acetone is dangerous to breathe in, so ...
Morgoth's user avatar
  • 209
5 votes

How to remove a PLA print stuck to a BuildTak sheet

I would do as fred_dot_u initially suggested, by increasing the bed temp (or using a hair dryer) to heat the BuildTak. Then, use a small fan to quickly cool the platform (or at least quicker than room ...
tbm0115's user avatar
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5 votes
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Stone-look surface via painting?

It's totally possible to achieve but the result vastly depends on your painting skills and your spray paint quality. Your can look at this page for a concrete example. How it compares to stone ...
exb2800's user avatar
  • 66
5 votes

Drilling 3D-printed plastic

Drilling is indeed possible, but as stated in previous answers you should preferably do this along the vertical from the print bed for maximum strength, and if possible use an undersized hole as a ...
Robin Keskisarkka's user avatar
5 votes

Drilling 3D-printed plastic

The primary difference between drilling FDM printed plastic and wood is that the plastic part is not solid the entire way through, and that plastic will melt or burn at much lower temperatures than ...
Diesel's user avatar
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5 votes

How can you both reliably print and remove your item, without breaking it when detaching it?

If your print is sticking too well, try printing directly onto the glass. If then, your print isn't sticking well enough, try using something like a glue stick instead. Most people use a paint scraper ...
craftxbox's user avatar
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5 votes

How can you both reliably print and remove your item, without breaking it when detaching it?

If you're ever in doubt regardless of what project you're working on... Tooth Floss. You need the good old-fashioned braided kind, none of the new "Pro Glide" elastic stuff. Pull a piece taut and ...
Electrafide's user avatar
5 votes
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Nail polish remover that won't dissolve ABS?

First of all, Nail Polish comes in 2 types: Acetone based, and acetone-free. The latter is based on Ethyl Acetate filled up with alcohol and water. Sadly, Ethyl Acetate also dissolves ABS, so it is ...
Trish's user avatar
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5 votes

Would PC be considered food-safe in this setup?

I also print coffee mugs. I have used ABS for a long time, and, given the statements here and elsewhere about bacterial growth sites, have been attaching my life to a thread. That's fine for me, but ...
cmm's user avatar
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5 votes
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How do I remove a 3D print stuck to the glass build plate

It's useful to know what material you used for the print. Also, you've referenced the glass that broke in the vise, which implies a glass bed, but did you use any adhesive spray or other application? ...
fred_dot_u's user avatar
  • 11.8k
5 votes

How to get superglue off PLA filament?

In agreement with what Akriss said, pretty much all "super" glue is CA (cyanoacrylate) glue, which is soluble in acetone. PLA itself is does not dissolve in or react with acetone, but the ...
R.. GitHub STOP HELPING ICE's user avatar
5 votes

Which filament type is easiest to sand smooth?

You may discover that the type of filament has minimal bearing on the surface finish. PLA melts at a lower temperature than most of the other filament types. During sanding, it can melt into and clog ...
fred_dot_u's user avatar
  • 11.8k
5 votes
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I painted an uncured UV resin print, now it feels sticky through the paint

Scrap the prints You didn't cure the print, and your paint might interact with the resin in such a way that it might never cure. The paint also will prevent UV rays from accessing the resin. With this ...
Trish's user avatar
  • 22.2k
5 votes

Metal coating 3D printed parts (electroless plating)

Good day, I have experience in applying electroless nickel on difficult 3D parts, in your case, it's exceedingly difficult to do it directly to the printed piece. You will need to seal the piece with ...
Marvin Sevilla's user avatar
4 votes

What can I use to "sand" my ABS prints?

Another method that you could try is an acetone vapor bath. (All credit to them, by the way) Just so you know, this is a very risky method, but the outcome is very nice. Remember that I warned you......
Dimitry M's user avatar
4 votes

Prints are now sticking too well to the bed. What to do?

I have only experienced PLA "super sticking" if the print bed is allowed to cool too much. I would suggest running a mild preheat to your bed when you find a print has stuck and the bed is cool. (What ...
WarOrdos's user avatar
4 votes

Bonding PETG to glass

The solvents that can dissolve PET are pretty nasty -- I wouldn't personally handle any of them outside a lab fume hood. If you have that, a 50/50 mix of MEK and methylene chloride should work. (...
Ryan Carlyle's user avatar
  • 6,616
4 votes

Is Tetrahydrofuran viable for dissolving PLA and sticking PLA objects together?

According to Shuichi Sato, Daiki Gondo, Takayuki Wada, Shinji Kanehashi & Kazukiyo Nagai: Effects of various liquid organic solvents on solventā€induced crystallization of amorphous poly(lactic ...
Trish's user avatar
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