You can't use an ordinary masonary bit in a rotary hammer. Well, you can, but the chuck you put the masonary bit in will be shaken apart. Those Jacobs chucks are press fit together, and normally that's enough to keep them in one piece for decades. But, if you mount it in a rotary hammer, you'll shake it apart.

Years ago I bought a Hilti TE-10 rotary hammer. It had both "rotation only" and rotary hammer modes on it. For use with the Rotation Only mode, it came with a keyless Jacobs chuck mounted on an SDS shank so that I could use twist drill bits up to 1/2 inch diameter in it. However, the owners manual for the tool warned never to use ordinary masonry bits in this Jacobs chuck for drilling masonry because the pounding action would shake the press fit Jacobs chuck apart, thereby wrecking a $75 or $80 accessory. The SDS system (patented by Bosch) allows for the forward and backward movement of the drill bit while it's turning, and is designed to stand up to that shaking.