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Thread: Grinder damage from Foreign bodies in packaged beans

  1. #1
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    Grinder damage from Foreign bodies in packaged beans

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi All,
    early this week the grinder in my Lelit Combi appeared to swallow something it didn't like and sht-itself,
    no longer grinds anything,
    odd noises etc
    we have been using the same machine for 18 years,
    initially Quaha Nap 2's and then lelit combi's ,
    and the same bean supplier fro the last 11 years ,
    and this is the first hiccup
    has anyone had experience in dealing with this sort of issue?,
    I have recovered the material from the machine,
    but cannot see anything obvious,
    apart from one very hard charcoal like bean ,
    I plan to teardown to check if I can locate the failure,

    anyone got any advice?
    I have contacted the supplier and them want to see the recovered beans etc,

    sinkas

  2. #2
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    I havenít experienced it, but I understand that it does indeed happen in rare cases that a small stone ends up in the beans.

    Ultimately they are an agricultural product so there is a small likelihood of some foreign object.

    Did I read correctly that you have been using the machine for 18 years?

    I guess that shows how rare this phenomenon actually is.
    Yelta likes this.

  3. #3
    Senior Member WhatEverBeansNecessary's Avatar
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    Not uncommon to get stones etc in beans. Most roasters will try to remove as much as possible with specailty machines, but ocasionally one will slip through. Has the grinder stopped entirely or is it just making funny noises?

    Can you check the burrs to make sure they don't have any visible signs of damage/still sharp?

  4. #4
    Senior Member Yelta's Avatar
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    Really is quite an uncommon occurrence, in all my years of grinding coffee beans Ive yet to encounter a stone or foreign body of any significance.

    I suspect those most at risk are home roasters without some method of stone/debris removal, the solution is self evident.

    Not saying it cant happen, however highly unlikely in commercially roasted beans, home roasters, due diligence required.
    Dimal likes this.

  5. #5
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    Hi
    I have been using same type of machine for 18years, the current one is 2yo

  6. #6
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    If its just making a whirring noise (motor still spinning) but the burrs aren't turning, then you've most likely stripped the internal plastic gear. Part is available for about $30, but requires a bit of dis-assembly to fit.

  7. #7
    Senior Member WhatEverBeansNecessary's Avatar
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    Quote Originally Posted by Yelta View Post
    Really is quite an uncommon occurrence, in all my years of grinding coffee beans Ive yet to encounter a stone or foreign body of any significance.

    I suspect those most at risk are home roasters without some method of stone/debris removal, the solution is self evident.

    Not saying it cant happen, however highly unlikely in commercially roasted beans, home roasters, due diligence required.
    That's who I always check my greens and roasted beans. Never can be too careful. Matt has a great design for an easy destined on another thread, I think that will be my next diy project.

  8. #8
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    Quote Originally Posted by kofekitt View Post
    If its just making a whirring noise (motor still spinning) but the burrs aren't turning, then you've most likely stripped the internal plastic gear. Part is available for about $30, but requires a bit of dis-assembly to fit.
    Hi I tried pulling it down today,
    the above the burrs look ok,
    it sound to me like the motor itself is struggling,
    If I made a video, would you be able to give an opinion of the failure?

    sinkas

  9. #9
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    After living overseas in some questionable regions, I found stones in tea or coffee semi-regularly (2-3 times a year?). It’s not always accidental or agricultural - some coffee or tea is ‘cut’ but various middlemen or by the growers themselves to get a higher pay at weigh-in. It’s a trivial cost to us, but it might aggregate to a few dollars a day/week in added income for whoever is involved.

    I used to hear stories from when the 5c aluminium can refunds were measured by weight - not sure if that’s true though.



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