Consistent and Accurate High-Speed Production

The OAK line of tube expanders feature machines dedicated to dependably expand heat exchange coils with little damage. Accuracy and precision during tube entry and exit ensure that tubes are expanded uniformly, and fins remain unharmed. Higher production rates are made possible by the short cycle time. The coil lift and eject systems assist in operator safety and ergonomics.

The vertical mechanical expander is designed specifically for the production of high-quality heat exchanger coils. The short cycle time allows for both mass production environments and flexible, short-run situations.

  • Production

    36" (914 mm) Coil Length: 15 seconds
    120" (3 m) Coil Length: 35 seconds


    8' (2.43 m) to 10' (3 m) wide,
    8' (2.43 m) to 22' (6.7 m) deep,
    Up to 38' (11.5 m) tall


    Up to 40 tons (40,000 kg)

    Air Supply

    8 ft3/min at 80–100 psi (0.23 m3/min at 5.6 bar)

    Power Supply

    For 60 HP Expander:
    55 kW @ .80/.82 PF, 24 VDC Controls

    Foundation information supplied upon request

  • Tubing Diameter

    .157" (5 mm) to 1" (25 mm) OD

    Tubing Shape

    Straight or Hairpin

    Tubing Material
    • Copper (Cu)
    • Aluminum (Al)
    • Stainless Steel (SS)
    • Steel
    • Cupronickel (CuNi)
    Coil Width

    Standard: up to 60" (1,524 mm)
    Special: up to 72" (1,828 mm)

  • Economic
    • Expansion speeds over 50 fpm means a 36” (914 mm) coil can be expanded in 15 seconds and a 120” (3 m) coil in 35 seconds.
    • All tubes can be expanded in a single cycle
    • Customized options available for short- or long-run production environments
    • Structure designed specifically for accuracy and longevity
    • 5 mm to 1" (25.4 mm) diameter tubing, coil widths up to 60" (1,524 mm) standard or 72" (1,828 mm) special
    • Rod short-out system prevents damage before it occurs by detecting expander rod buckling, saving perishable tooling scrap and coils
    • Coil length repeatable to 1/16" (1.5 mm)
    • Many options to enhance production rate & operator ergonomics: coil handling, coil movement and coil containment during expansion
    • Auto-rod option reduces set-up time
    • Touch screen auto setup of coil height control ensures consistent, repeatable, part-specific setups vs. operator-based setups
    • Touch screen based auto rod pattern reduces changeover time
    • Coil eject system pushes coil out after expansion
    • Operator touch screen controls can be configured for different languages
  • Standard package may include:
    • Compact Design
    • Standard Lift with Fixed Enclosures
    • Self-Storing Backplates
    • Rod Short-Out System
    • Final Expander Support Mechanism
    • Coil Eject
    • Hydraulic Cooling System (Oil to Air)

View Product Brochure