I also had one of my blades break right at the screw threads on my 6″ Ion. Yes, it was trying to reach a cust. rep. at Ion,but once I got a real person,they were more than helpful. The lady i spoke with asked if the blade broke at the screw thread? It seems they received a bad batch of metal. A friend of mine also had 2 sets of blades break, so they sent him a new auger bit and blades. As a side note: Last week I drilled over 700 inches of Upper Red Lake ice on one full charge! Impressive.