I just aquired a used Delta 14" bandsaw. This is the first one I've ever used that had ceramic guides and thrust bearings/guides on it. I guess they're not really thrust "bearings" since they don't rotate. Which is weird because I'm seeing quite a few sparks when the back of the blade pushes against the ceramic. Is this normal? I worry sparks could get sucked into the dust collector and start a fire.

Jason