A split ball portion for a spherical bearing arrangement, which split ball portion is to form one of a plurality of split ball portions to be arranged together in a bearing housing of the spherical bearing arrangement to form a composite ball, the split ball portion comprising: an outer bearing surface; at least one separation face, which lies adjacent a separation face of a neighbouring split ball portion when forming the composite ball; and at least one axial end face, the split ball portion comprising at least one chamfer surface at the junction of at least the outer bearing surface, a separation face and an axial end face.