Specifications

6
Airetool Heat Exchanger & Condenser Tube Expanders Overview
Series 900
1/4" (6.3 mm) - 3/8" (9.5 mm) outside diameter
Series 1300
3/8" (9.5 mm) outside diameter
Series 8012
1 3/4" (44.4 mm) - 3" (76.2 mm)
outside diameter
Series 1200
1/2" (12.7 mm) - 1 1/2" (38.1 mm)
outside diameter
Series 800
1/2" (12.7 mm) - 1 1/2" (38.1 mm)
outside diameter
Airetool heat exchanger and condenser tube expanders have
long been recognised as the standard against which all other
brands are measured. The additional time we invest in the
manufacturing of our expanders results in the consistent per-
formance and incredible durability as expected by heat ex-
changer OEMs.
The World Standard for Tube Expanders
Tube expanding is the art of cold forming the ends of tubes
to provide close contact with the metal of the surrounding
tube bores to form a tight mechanical seal and/or connec-
tion. In other words it is a mechanical method for creating a
mechanical connection between a tube and a tube bore.
Airetool manufactures condenser, heat exchanger, boiler and
furnace expanders as well as a large number of expanders
for special applications.
Tube expanders comprise:
Mandrel: A conical pin in the centre that presses the rolls
against the tube when it is driven forward.
Tube Expanders
Rolls: A set of three or more conical cylindrical parts that are
driven by the mandrel and that are in contact with the tube
walls to be expanded. The taper on the rolls is in the oppo-
site direction and is half the taper on the mandrel on a parallel
roller.
Cage: This is the housing of the expander, as it fi xes the
mandrel and the rolls. The recesses that contain the rolls also
have a feed angle that draws in the mandrel to provide the
expansion of the rolls.
Mandrel, rolls and cage are three components you will fi nd in
all expanders. Other parts classify the expander model.
Thrust assembly: This assembly sits on the cage and per-
mits the adjustment of the expansion depth. The thrust col-
lar remains stationary at the tube sheet or at the end of the
tube while the cage, mandrel and rolls expand the tube. You
will fi nd the thrust assembly on condenser, heat exchanger,
some furnace and special application expanders.