Ball screw with an improved end deflector

A ball screw, comprising a screw shaft having a helical thread formed on an outer circumference thereof, a nut having a central bore and defining a helical thread corresponding to the helical thread on the screw shaft on an inner circumferential surface thereof so as to define a spiral raceway, and a plurality of balls received in the raceway, the nut including a ball return hole extending therein in an axial direction and an end deflector receiving recess formed at least on one axial end thereof to complementarily receive an end deflector which defines a part of the raceway in cooperation with an opposing part of the nut and connects the raceway with the ball return hole,

• wherein the end deflector is provided with a tongue that projects from an inner circumferential face of the end deflector to guide the balls that are passed between the ball return hole and the raceway, and
• wherein the end deflector is provided with an engagement claw on a circumferential end face thereof, such that the engagement claw engages a part of the helical thread formed on the nut so as to retain the end deflector in the end deflector receiving recess of the nut in the axial direction.