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After a few prints the squeaking from my machine was driving me nuts.

Armed with Google, I learned that the recommended lubricant for the acetal/delrin bearings is triflow: http://www.pbnation.com/showthread.php?t=765399

Other lubricants may cause the delrin to swell!

After greasing my gears and belt pulleys, the squeaks are gone, and I'm able to tighten the belts a little more to remove a bit of backlash.

Thank you, random old thread, for pointing me in the right direction.

bot wrote:Thank you, random old thread, for pointing me in the right direction.

I also learn a lot from the old threads. I am glad that they do not purge the old threads.