Flow Forming Machine

Leifeld ST 4RS Series

This LEIFELD ST Series with 4 rollers is specially designed for very heavy flow forming processes. Due to extremely strong construction of machine frame, and due to enormous forming forces and spindle torque, it is one of the strongest and most powerful flow-forming machines worldwide.

The machine is equipped with four very powerful radial units, which can be off-set axially to each other. This special feature allows highest flexibility and boundless opportunities in flow forming. An axial off-set to zero-line allows fastest forming feedrates. An axial off-set 4 times different allows highest accuracy and perfect surface qualities combined with high reduction rates.

To find the optimum programming for each workpiece a digital, graphical force measuring system is provided to check and evaluate the forming force distribution of all forming axes.


Main Characteristics

  • Extremely sturdy and torsion-resistant frame construction
  • Highest flexibility in the production of lengths, external diameters, wall thicknesses and reduction
  • Highest accuracy and perfect surface qualities combined with high reduction rates
  • Perfect centricity and a perfect run-out at high feedrates
  • Very durable machine design


Technical Data

ST 650 H 6200-4RS
ST 650 H 9100-4RS
ST 750 H 3400-4RS
Workpiece-Ø, min. 200 mm 200 mm 150 mm
Workpiece-Ø, max. 650 mm 650 mm 750 mm
Workpiece length, max. when      
- Forward flow forming, approx. 6,000 mm 9,000 mm 3,300 mm
- Reverse flow forming, approx. 12,000 mm 13,000 mm 6,600 mm
Distance between centres, min. approx. 2,250 mm 8,500 mm 4,600 mm
Distance between centres, max. approx. 10,250 mm 20,450 mm 8,050 mm
Tool mounting, DIN ISO 702-3 (formerly DIN 55027), size 20 15 20

End products

  • High-precision pipes
  • Drill
  • Housings
  • Cylinders