Abstract: A rotary and angular movement balanceable assembly includes a first balancer member having concave inner race surface and defining a receiving cavity, a second balancer member disposed in the receiving cavity having a convex outer race surface, a ball bracket mounted inside the receiving cavity, and a plurality of balls retained by the ball bracket in such manner that each ball is in rolling contact with the concave inner race surface of the first balancer member and the convex outer race surface of the second balancer member. Thereby, the rotary and angular movement balanceable assembly is installed between a thrust receiving unit and a thrust applying unit so as to rotatably support the thrust applying unit and enable the thrust applying unit to have both rotary and angular movement while a loading force is applied by the thrust applying unit to the thrust receiving unit.