Guys, I recently went through 5 of these tumblers, and didn't find one that would work more than 1.5 hours at a time before it overheated. Once it would cool off, the tumbler would restart, but I just got tired of going back and forth to the HF store. I spoke with their technical support people, and they told me that they "thought they had fixed that problem", I ended up ordering one from Midway USA for $30.00, and it has worked fine for me. Don't get me wrong, I love HF (their calipers are great for reloading) but I wouldn't buy one of their tumblers.