Three expansion rolls and three flare rolls, self feeding tube expanders with adjustable thrust collar for friction free operation and long tool life, as well as allow to adjust the flare length. This expander will simultaneously expand and flare the tube. Adjustable collar allows consistent flare length. An excel- lent expander for re-rolling a leaky tubes and for new constructions of Water Tube Boilers, Fire Tube Boilers, Economizers, Air Heaters. Expanders with 6 rolling rolls and 3 flare rolls are available on request.