Ultimaker PEEK Replacement
by tlalexander, published
Drawings and everything are included in the Zip. the STL is useless but thingiverse makes a nice preview out of it.
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Sweet! My Ultimaker is back in business and not snotting all over prints. I ended up finding a 3/4" diameter x 3" long piece of PEEK on Amazon for ~$10. Made the flange 5 mm thick as shown in the drawing (which is a little taller than the bosses on the 4-holed aluminum plate, if you have the version that has the bosses in the corners) but left the flange at the 3/4" stock diameter (just clears the inner corner of the boss). Also stuck with the 21 mm overall length as in the drawing, but ended up with a body diameter of 0.552", which was a slip fit for the holes in the aluminum plate (YMMV). Was going to get fancy and cut a hex on flange, but figured it was good enough (and I was anxious to try it out). Hopefully I won't have to booger it up with vise grips if I ever need to take it out. ;-)
Thanks for reminding me about this, I knew someone had recently asked me something but I forgot where it was!
Anyway, you can get PEEK from McMaster Carr, or I got mine for about 1/2 the price from a local plastic supplier.
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I originally made mine from 3/4" diameter PEEK, but realized that 5/8" diameter PEEK should be fine, and is cheaper, so I redesigned it for that.
Its important that the M7 threads are AT LEAST 10.2mm deep. I show the hole as 11.2mm deep, but its safe to go deeper. The M6 threads that hold the nozzle on are plenty strong. I messed up the one on my machine so I've only got a few mm of M6 thread there, and its holding up just fine.
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