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A little while ago, I had a print fail. The extruder dragged a pile of molten plastic around and tore the insulator around the hotend of my printer. After suffering through a few prints, it was time to repair it. This is how I replaced the insulator on my Monoprice Select Mini 3D printer.

Step 1: Tools Required

Picture of Tools Required

The first step is to gather the tools required for this repair. The list of tools is pretty minimal:

  1. Phillips Head Screwdriver
  2. Small Pliers
  3. Scissors
  4. Utility Knife

Also required are a few materials: the new ceramic insulator and some high-temperature electrical Kapton tape. These links are what I ordered:

ancienthart5 months ago
Hi Great Lakes Makes. I had the exact same issue about a print getting wrapped up in my insulation. However, being located in Australia, I didn't have access to the ceramic or the kapton tape, like AT ALL. :(
I found that a LOT of teflon plumbers thread tape works just as well.

I also found out the hard way that while woolen felt does indeed have a smoke temperature well above 280 celsius as found on the Internet, and works as a terrific insulator for a while, it will still char, and produce one heck of a burnt-hair stink.
Great Lakes Makes (author)  ancienthart5 months ago
I can’t imagine how bad that wool would smell! Maybe look for mineral or rock fiber home insulation? As for tape, I think this is probably the same as Kapton.
struna5 months ago
It's Hotend not Extruder.
Great Lakes Makes (author)  struna5 months ago
Thank you for the feedback, I tend to use the words interchangeably. However, you are correct, on this printer, the nozzle is the hotend, and the extruder would be the gear drive at the top of the Z-Axis tower.