Hemera Gear failure

Discussion in 'HotEnds & Extruders' started by Matt, Feb 19, 2020.

  1. Matt

    Matt Well-Known Member

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    First off, I have had very good results with the Hemera, it prints really nicely. However I came back one evening to find a failed print. No matter what I tried it just kept failing. I then decided to take it apart and noticed that the gear to the second hobbed wheel was freely rotating relative to the motor drive gear.I cant see any obvious cracks etc, but I had previously noticed red 'rust'

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  2. elmoret

    elmoret Administrator

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    Known issue, bad batch of press fits, contact E3D.
     
  3. Matt

    Matt Well-Known Member

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    Replacements being sent out on Monday. I cannot obviously see any cracks which I thought was an issue, didnt know about press fits also
     
  4. elmoret

    elmoret Administrator

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    Bad press fits cause the cracks, a crack is there if you look close enough.
     
  5. sascharossier

    sascharossier New Member

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    same issue here ... even managed to find the micro-crack ... hope the replacement will hold ...
     

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  6. Loodachris

    Loodachris New Member

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    I just discovered the same issue with my gear set. Batch #2256-16 couldn't figure out what was going on and upon inspection of the gears I didn't see any cracks but that one gear is freely spinning. E3D is probably inundated with support tickets about this because I have yet to hear back. I should of just kept the stock hotend on what was I thinking!
     

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