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Antoine, thank you for the quick reply. I'll contact support, but I rather purchase the bearings locally, the cost of shipping parts as cheap as...
As far as I see it, the idler and hot end guides are aligned. Only the teeth of the hobbed shaft are off. Isn't this a machining error, the teeth...
Mine had failed too. Seems like a faulty batch of bearings. I bought a couple from SKF and submerged them in oil before installing them. No issues...