A center shaft ( 90) of a, bent axis type axial piston pump/motor includes an outer race ( 920), which is attached to a shaft attachment hole (41 ) of a cylinder block ( 40V, has a sha ft portion accommodation hole (921 ) at one end and has a spring accommodation hole ( 922) at the other ebd , and an inner shaft (910) , which includes a shaft supporting spherical head portion S912) having a large outer shape dimension at a distal end of a shaft base portion 1911) and attached to the shaft portion accommodation hole ( 921) of the outer race ( 920) through the shaft base portion (911)
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