Why does the drill bit keep coming loose on my Cordless Hammer Drill?
Bring your drill back to the store. Have the tool department person show you how. If you are doing it right then you know the drill you have has a poor design. The chuck of your drill has to be hand tight but really tight, wear work gloves with grip on the palm and finger side or use a jar opening rubber grip pad. Make sure your drill is set for hammer and not traditional. Check the speed setting too. Use a smaller masonry bit as your pilot hole then use the size bit for the hole you need for your project. The smaller bit cuts through easier, then the larger bit opens it up. I found you don’t burn up bits by doing it this way and the larger bits are expensive, especially if you have several holes to drill.
