Bad wheel hub bearing?
If you are referring to the slip-on type of rotor, then yes, some of them feel loose on the hub and this is normal.
Tap on the rotors with a hammer, after removing the tire and wheel and the brake assembly. The rotors will come loose. Slide the rotors off and reverse the process.
Tap on your 1998 Mazda brake rotors with a hammer or mallet until they become loose. The brake rotors will simply slide off.
The slip-on type of rotors typically don't fit snugly on the wheel lugs. There is often quite a bit of play, which is fine as long as you never drive with loose wheel lugnuts.
It is quite common for rotors to be stuck in place. Tap on the back of the rotor with a hammer, until the rotor is loose.
yes, if they aren't you will loose braking efficiency
Bad bearings inside or loose castle nut.
depends on the condition of your old rotors. Buy what you need.
Your rotors had the grooves before, from the old pads. You should have had them turned. Next time check rotors at time of fitting new pads. If you can see or feel grooves then they should be repaired.
Take of the wheel, remove the brake caliper, and the rotors should come right off. There is nothing holding them in place other than the wheel lug nuts. However, sometimes they get corroded in place. The easiest way to break them loose is to leave the wheel on but loosen the lug nuts slightly. Roll forward and backward (slowly) a couple of times. That should break them loose. If that doesn't work, try a BFH.
No, new brake pads should not be tight against the rotors during installation. There should be a small gap between the pads and the rotors to allow for proper braking performance and to prevent excessive wear on the pads and rotors.
new pads should have full surface contact with rotors,as should old ones
The rotors should be smooth, no grooves where the pads touch.The rotors should be smooth, no grooves where the pads touch.