Device for guiding a shaft of a sprung balance

A device (1) for guiding a rotary shaft (6) of a sprung balance, comprising:

• the rotary shaft;
• and
• a guide bearing for guiding an end or a pivot fastened to an end of the rotary shaft of the sprung balance, the guide bearing comprising a blade and a support part for corning into contact with and holding the end or the pivot of the rotary shaft of the sprung balance,
• wherein an end part of the rotary shaft or of the pivot, or the contact parts of the guide bearing are made of a material with a Young's modulus of less than or equal to 100 GPa and/or with a coefficient of friction of the materials of the contacting parts or of the coating of the contacting parts of less than or equal to 0.15.