Quote Originally Posted by Ross77 View Post
Regarding the bearings in an ic engine are probably a high grade and could be deep groove bearing, much stronger than a similar looking skate bearing. Bearing quality is usually reflected by the price but unfortunatly they all look the same.
You are right about the quality, on the model engines the inner bearing is always a special order as its a big shaft size and the outside diameter is not that much more, but the outer bearing they always have and say its a common one - nothing special ... dead cheap and don't last like the originals

Thanks for the replies