Tool spindle for a honing machine with a bowl-shaped holder for a honing ring

A tool spindle for a honing machine, comprising:

• a bowl-shaped holder having a circumferential peripheral wall connected to a bottom part, where the bowl-shaped holder is configured to hold a honing ring on an inside of the bowl-shaped holder, and where the bowl-shaped holder comprises a shaft extending from the bottom part;
• an electric motor mechanically coupled to the shaft of the bowl-shaped holder, the electric motor configured to rotate the bowl-shaped holder about a vertical axis;
• at least one expansion element disposed on the inside of the bowl-shaped holder along an inner surface of the circumferential peripheral wall, where the at least one expansion element radially clamps and centers the honing ring inside the bowl-shaped holder;
• a hydraulic chamber disposed in the bottom part of the bowl-shaped holder;
• at least one hydraulic line connecting in fluid communication the at least one expansion element and the hydraulic chamber;
• a single adjustment element movable in relation to the bottom part of the bowl-shaped holder, where the single adjustment element is in fluid communication with the hydraulic chamber;
• and
• at least one drainage channel extending through the bottom part from the inside of the bowl-shaped holder to an outside of the bowl-shaped holder.