Mine is about 10 years old. It froze about a month ago, wouldn't turn. I have the Go Big and Go baby, so wasn't without one. DH took it apart. He was impressed it was all metal inside. It was an easy fix and now works like new. He said one of the roller bearings had busted. After 10 years, no lubrication left in the bearings so it was metal to metal. Thus the bad cranking sound I was hearing.