AUTO-ADJUST CYLINDER USED WITH BEAD WIDTH ADJUSTING APPARATUS

A lower chuck assembly used in a chucking apparatus of a tire uniformity machine comprises a dual piston cylinder having an axially movable outer piston rod, an inner piston rod axially movable with respect to said outer piston rod, said inner piston rod having a stem opening; an inner piston stem having a threaded shaft detachably received in said stem opening and extending axially from said inner piston rod; and a nose cone shaft having a nose cone opening therethrough which slidably receives said inner piston stem.