Sunday, July 15, 2007


Bushing wear on the Mk I AEM

Fitting the new HDPE polymer pump gave me the chance to do a complete breakdown of the Mk I AEM extruder and do an assessment of how it is holding up. It had been working fine and everything inside looked all right. I did notice that the threads of the studding that actually pumps the filament were worn down where they met the bushing surfaces.

You can see the wear circled in red in this pic. The steel bushings seemed to have suffered little more than the odd scratch on the contact surface, a result that leads me to believe that the bushing steel is considerably harder than that of the studding.

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