Which tool to perfectly center a wheel?

or any kind of object. I always end up with a wobly axle or motor

Try SmartSnap, it will create a grid on an object so you can lock any tool to any point on the object.

shoould I download or remove somthing to use it?

I haven’t used this particular download, but it’s here.

oh! I think I have a tool that puts a grrid on every object I target on do I have to change settings?