Got a HART cordless drill that I bought a while back, and it works really good. But, I recently noticed a problem. I was drilling out a broken bolt in a wheelchair, and noticed that when drilling through the steel with the largest bit I had; the keyless check would lose it's grip around the drill bit and just spin. I tried tighening the chuck up around the drill bit as tight as I could grip it, but still would not hold that bit drill bit tight enough .


Is this a common problem with keyless chucks ?