I bought the bit after struggling with shallower holes when drilling 30 inch 3/4 and 7/8 deep holes in hard rock. It was a beast and did a great job, but suddenly the drill lost all power and speed due to the smell of burnt electronics. It was as if the engine had shifted from 6th to 3rd gear, only it had no torque or power. I hate to say it, but port cargo drills lasted longer despite training for half as long. I'll take it to their service center about 80 miles away and see what they say. Iβ¦