I have a DBS(Norway) and a friend has Monarch(Sweden) bike both with one piece cranks. The are different than the standard American version. We can get the locknut, washer and bearing races removed from the crank. The problem lies in the bearing cups. The bearing cups must be removed to remove the cranks. I tried hammering out from the backside and unscrewing the cups (both left and right). Nothing has worked for either of us.

Does anybody have any insight.?