Spindle too weak

Hey guys, can you tell me if my spindle is broken? I’ve used my carvey sparingly but yesterday I noticed that there is a lot more rattling sound when cutting. Visually the spindle seems to be actually slowing down. I’m only cutting pine and maple so I can’t imagine cutting aluminum. It wasn’t like this before. Anyone have this issue?

ps Is there an alternative to the default carvey spindle?