An improved semi-articulated railway power bogie has a pair of multiple axle sub-bogies semi-articulated for creep force turning control while retaining freedom of rocking and relative longitudinal motion. An equalized centered bolster suspension and low load transfer rod linkage maintain high equalization of loads and tractive forces at the wheels to provide overall high adhesion and curving efficiency. Various improvements may include a preloaded resilient compression element in an articulating mechanism for improved sub-bogie turning control, two piece bearing adapters carrying primary spring suspensions and with rubber bushed traction rods and lateral thrust control for transmitting longitudinal and lateral forces to sub-bogie frames, and rubber bushed nose links connecting traction motor nose connections to transoms of the frames.