Patent ID: 7536929

Claim:
A ball screw with a thread path for accommodating rolling balls, the ball screw comprising: a spindle including a first thread groove; a spindle nut positioned on the spindle, the spindle nut having a second thread groove, a through-opening and an inner circumference; and the thread path formed by the first thread groove on the spindle and by the second thread groove in the spindle nut, the thread path including at least one common turn with a run-out end and a run-in end; at least one deflecting piece positioned in the through-opening of the spindle nut; the deflecting piece including a deflecting channel positioned and configured to return the rolling balls from the run-out end to the run-in end of the at least one common turn of the thread path, wherein the through-opening includes a rim positioned on the inner circumference of the spindle nut, the rim having a convex rounding comprising material of the spindle nut drawn from radially inside to radially outside the spindle nut.