A padlock having a key-rotated cylinder with an end face juxtaposed with an end face of a pin rotatable in a padlock body to release a pair of balls held by the pin in notches in shanks of a shackle and wherein the end faces having entraining formations enabling rotation of the cylinder to rotate the pin. One end face has a pair of entrainer posts disposed diametrically opposite one another and offset from a center of a respective end face and reaching toward the other end face, the posts of one of the end faces being angularly offset from the posts of the other end face to define the angular play between them, and a bridge between the posts and disposed on the end face of the cylinder for taking up the play.