Method for hardening a bridge assembly of a rotational body

A method for hardening a bridge assembly of a rotational body having an axis of rotation for an electric drive, the method comprising the following steps for balancing and rotational hardening, the balancing comprising:

• rotating the rotational body about the axis of rotation at an imbalance determination rotational speed in order to detect an imbalance of the rotational body;
• determining the imbalance of the rotational body;
• fastening at least one balancing weight to or removing at least one balancing weight from the rotational body at a standstill rotational speed in order to compensate the imbalance;
• and
• the rotational hardening comprising:
• rotating the rotational body about the axis of rotation at a hardening rotational speed, wherein a magnitude of the hardening rotational speed is greater than a magnitude of the imbalance determination rotational speed;
• wherein the hardening rotational speed is set such that at least one bridge assembly of the rotational body has a strain measurement of at least 0.2 percent up to and including 1 percent after rotational hardening.