For the 744, directly from the FCOM:
BANK LIMIT Selector
Rotate - sets AFDS commanded bank limit when in heading select (HDG SEL)
roll mode as follows:
• AUTO - varies between 15 - 25 degrees, depending on TAS, flap
position, and V2
• 5, 10, 15, 20, or 25 - selected value is maximum, regardless of airspeed