bearing bearing cage FDC3809A is the same as DC3809A,but the torque is more higher than DC3809A,And low noise. Sprag type bearing cage FDC1. Type FDC are the sprag type freewheel cage without inner or outer races. Its model and construction is followed for, this type provides higher torque and lower noise while fixed convenient. 2. It must be installed in a design providing races, bearing support ...