Electric power steering gear with an anti-rotate feature

A method of providing a lash-free electric powered steering gear for a commercial vehicle, the method comprising:

• providing a housing including a cylindrical portion extending in an axial direction, an interior wall of the cylindrical portion defining a first groove and a second groove extending in the axial direction, the first and second grooves having inwardly tapered walls;
• providing a ball screw disposed in the housing, extending in the axial direction, and defining a through hole extending in a radial direction having a first and second ends;
• providing a ball nut disposed in the housing surrounding the ball screw and configured to rotate relative to the ball screw;
• providing a first anti-rotational pin having at least one tapered end disposed in the first end of the through hole;
• providing a second anti-rotational pin having at least one tapered end disposed in the second end of the through hole;
• and
• exerting a radially outward force on the first anti-rotational pin and the second anti-rotational pin using a spring disposed between the first anti-rotational pin and the second anti-rotational pin so as to bias the first anti-rotational pin and the second anti-rotational pin in a radially outward direction towards the first and the second groves respectively so that the at least one tapered end of the first anti-rotational pin and the at least one end of the second anti-rotational pin engage the first and second grooves respectively and thereby restrict rotation of the ball screw relative to the housing.