Patent ID: 9267195
Filing Date: 2016-02-23
CPC Classification: B62D,C21D,C22C,F16H,Y10T

Claim Text:
1. A threaded spindle of a ball screw drive, having a ball groove wound helically about a spindle axis for rolling of balls, wherein: the ball screw drive is formed from round bar material having a diameter of 10 to 40 mm; the bar material has a core that is heat-treated to a yield strength of at least the bar material is formed from rolling resistant heat-treated steel comprising the following elements indicated in mass fractions in relation to overall weight: 0.5% to 0.6% inclusive carbon; 0.0031% to 0.005% inclusive boron; and at least 3.5 parts of titanium in relation to 1 part of nitrogen.