Select the hammer drill mode only when drilling into masonry if your encounter problems drilling into other materials with the hammer on.
Insert a high-speed carbide-tipped drill bit into the chuck if you encounter problems drilling into masonry. Regular drill bits won’t work properly. Use the right type of bit for the project. High-speed steel twist drill bits work well with metal drilling, and augers or twist drills work well with wood drilling. Don’t force the tool — use the right bit instead — but apply a little pressure drilling into cinder block, and a lot of pressure drilling into concrete.
Look at the flow of dust if the Milwaukee hammer drill doesn’t appear to be penetrating. A smooth, even flow of dust from the hammer action into concrete indicates penetration. Don’t run the drill without penetrating — look for a reason why, like encountering a metal bolt in masonry, for example.
Open the chuck jaws by turning the sleeve in a counterclockwise direction if the chuck won’t open. Close the chuck by turning it clockwise by hand if the bits fall out.
Back wood projects with a chunk of scrap wood if the wood splinters. Pull the bit out of the hole from time to time to clear wood chips from the flutes on the bit.