An assembly for a drug delivery device comprising - at least one drive member (19, 26) adapted and arranged to be moved in a delivery direction during a dose delivery operation of the assembly and in a direction opposite to the delivery direction during a dose setting operation of the assembly, - an energy storing member adapted and arranged to store energy and to cause movement of the drive member (19, 26) in the delivery direction, and - an interaction system adapted and arranged to generate a friction onto the drive member (19, 26), wherein an amount of friction regulates a speed of movement of the drive member (19, 26) when drive member (19, 26) is moved in the delivery direction, - wherein the interaction system comprises a first interaction member and a second interaction member, - wherein the interaction members (17, 18) are moveable with respect to one another and with respect to the drive member (19, 26), and - wherein the second interaction member is configured to exert a radial force onto the drive member (19, 26) such that the speed of movement of the drive member (19, 26) is reduced when the drive member (19, 26) is moved in the delivery direction during a dose delivery operation, characterized in that - the second interaction member is axially moveable with respect to the first interaction member between a first position and a second position, - the second interaction member is adapted and arranged to be moved towards the first position during a dose setting operation of the assembly and to be moved towards the second position during a dose delivery operation of the assembly, and the interaction system is adapted and arranged such that the amount of friction increases when the second interaction member is moved towards the second position. - at least one drive member (19, 26) adapted and arranged to be moved in a delivery direction during a dose delivery operation of the assembly and in a direction opposite to the delivery direction during a dose setting operation of the assembly, - an energy storing member adapted and arranged to store energy and to cause movement of the drive member (19, 26) in the delivery direction, and - an interaction system adapted and arranged to generate a friction onto the drive member (19, 26), wherein an amount of friction regulates a speed of movement of the drive member (19, 26) when drive member (19, 26) is moved in the delivery direction, - wherein the interaction system comprises a first interaction member and a second interaction member, - wherein the interaction members (17, 18) are moveable with respect to one another and with respect to the drive member (19, 26), and - wherein the second interaction member is configured to exert a radial force onto the drive member (19, 26) such that the speed of movement of the drive member (19, 26) is reduced when the drive member (19, 26) is moved in the delivery direction during a dose delivery operation, - the second interaction member is axially moveable with respect to the first interaction member between a first position and a second position, - the second interaction member is adapted and arranged to be moved towards the first position during a dose setting operation of the assembly and to be moved towards the second position during a dose delivery operation of the assembly, and