1 Topic by Barafu Albino

  • Barafu Albino
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  • Registered: 2014-04-06
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Topic: Black (metal?) dust under the bearing.

Yesterday I took out my filastruder after a year of inactivity and started making filament from white ABS/PC mix. After a 5 hour run on 185C I made 1 spool of filament and found a lot of black dust on the base board right under the bearing. Is it a known effect?
I have greased bearing afterwards but I doubt that many dust can come from it. It looks more likely as if the auger is scratching the barrel, but how did this dust end up on the wrong side of the auger then? The white plastic ring that presses the bearing is covered with this dust too. I guess I need to up the temperature a bit too.

2 Reply by Barafu Albino

  • Barafu Albino
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Re: Black (metal?) dust under the bearing.

So I have finally found time to reassemble my filastruder. I have found a source of black dust. The bearing was grinding at the auger and actually worn two grooves into it, 1mm depth. Can somebody suggest a reason for this? May be I had my motor a little bit skewed.

3 Reply by elmoret

  • elmoret
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Re: Black (metal?) dust under the bearing.

Its a bit unclear - a photo would help, but I'd say it is nothing to worry about.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

4 Reply by Barafu Albino

  • Barafu Albino
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Re: Black (metal?) dust under the bearing.

http://soliforum.com/i/?GGa1W6J.jpg
I solved it by moving collar over the damaged part and made sure that everything is as aligned as I could do it. Now looking for a new barrel insulation. I have thrown away the stock piece. The usual mineral foam is sold only in enormous rolls here and honestly, I do not want to use it.