All good stuff to know, but it was used with correct voltage and no power cord.
I guess I am gonna have to go with the shorted wire answer. Thanks heaps for your help here guys.
It was a reputable brand, and I wasn't using it constantly or abusing it. Only drilled a couple of holes, so it might have been some sort of wiring issue. It is under warranty no problems.
I had thought it could be wiring or coils shorting in armature or stator, but wondered if there are any...
I am a mechanical engineer with very basic understanding of electrical motors.
I was working with a brand new drill the other day and it burnt out. It caused a lot of smoke. When I opened it up I noticed that the insulation around the coils on the stator and the armature are burnt off, but...