Rotating Machines

Concentric Stranders

POURTIER Concentric Stranding lines can strand up to 61 wires.
It is perfectly adapted for 37 and 61 wires bare copper strand production at high speed.
It can also run for steel wire armouring and copper wire screening production at high speed.
Energy recovery:
The common stranders (rigid or concentric) control the tension by mechanical braking systems (energy burned in heat). On POURTIER/Sampsistemi concentric strander, each motor regenerate electrical power during the braking operation.
This power is used to supply the capstan and therefore allow a lower consumption (for example 70kW for a 300 mm² strand).
Compact line:
Thanks to the multi-wire process, the length of the line is even shorter than a traditional rigid stranding line. Moreover, this line is much more compact than a conventional concentric stranding line and enables floor space reduction for our customers.
Advantages at a glance:

  • Energy regenerative solution;
  • Reduction of conductor (Cu / Al) consumption;
  • 2 to 3 times faster than a rigid strander;
  • True concentric stranding process;
  • “Bobbin-less” solution;
  • Reduced length thanks to multiwire.

  Stranding Screening Armouring
Application COS 1200 COS 1200R COS 1200 COS 1200
Wire dia. [mm] Cu / Al 1.5 / 1.75 – 3.7
Al alloy 1.75 – 3.5
Cu / Al 1.9 / 2.2 – 4.7
Al alloy 1.9 – 4.4
Cu 1.2 – 2.0 Al 0.9 – 1.6
Geared speed [RPM] 500 500 up to 1750 kg
250 at 3200 kg
500 500
# Wires / bobbin 3 3 6 6
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