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Makergear M2 V4 Nozzle: More Silicone!

A Makergear forum discussion on PETG hair and the prevention thereof prompted me to take a look at the silicone coating I’d applied to the nozzle:

M2 - nozzle silicone - applied

M2 – nozzle silicone – applied

That was ten months ago. This is now:

M2 Nozzle - worn silicone coat

M2 Nozzle – worn silicone coat

The camera sees the nozzle in a mirror laid flat on the platform, making the image less crisp than a direct view.

So the silicone seems a bit worn around the tip, has acquired a few firmly adhered globs, and definitely isn’t as shiny.

Rather than (try to) peel it off and reapply a new coating, I picked off the globs, cleaned around the nozzle, and slobbered a thin layer atop the existing silicone:

M2 Nozzle - more silicone

M2 Nozzle – more silicone

Extruding a few millimeters of filament pushed the film off the nozzle opening and it now works as well as it ever did.

 

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  1. #1 by Jason Doege on 2018-11-28 - 08:23

    How many spools of filament does a nozzle last?

    • #2 by Ed on 2018-11-28 - 14:14

      After 4 kg of PETG the nozzle is still in fine shape!

      Because I use only a single plastic, the nozzle doesn’t get clogged and doesn’t need (interior) cleaning, which means I’m not reaming it with wire or drills. Steel can’t possibly be good in a tiny brass hole, but maybe I’m just a fussbudget about such things.

      Folks report carbon fiber filaments definitely erode brass nozzles like crazy, hence hardened or stainless steel nozzles have become a thing.

  2. #3 by Vedran on 2018-12-03 - 13:26

    E3D are now offering secret sauce nozzles, if memory serves they are hardened tool steel, plated with something even harder and nanocoated with a non stick layer of some unobtanium stuff. I’d love to try one, but realistically I don’t need it and they charge 27GPB which is a bit crazy. Sanjay claims it’s possible to get a very flat top layer by ironing the print with the nozzle (no extrusion) since plastic will not stick to it

    • #4 by Ed on 2018-12-03 - 20:17

      “Ironing the print” … that’s a technique I never imagined.

      Seems like an up-armored nozzle solves many problems I’m glad I don’t have!

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