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Breville Oracle Grinder Problems

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  • Breville Oracle Grinder Problems

    Hi everyone,
    I am looking for some advice as I am a bit stumped.

    I have owned my oracle for 9 months and have not really had any problems with it.
    Yesterday while grinding the grinder started to labour and slow down to the point where if I kept it going I reckon it would’ve stalled itself.
    I pulled the whole assembly apart and cleaned the whole chamber.
    The driveshaft was binding to the bush, a dob of lube loosened it up.
    There is a lot of vertical movement, is this normal?

    I can’t seem get my grind fine enough since this incident.

    Inspecting my outer burr there is a line all the way around on the cutting edge.
    What has caused this? Is this connected?
    Is this normal?
    I have never had anything foreign in the grinder.
    Isthis from the inner burr touching? If so why didn’t I hear any squealing?

    thankyou for your wisdom

    hugh

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