GEMO helix cables for roof opening and shading systems

Key initial selection criteria:

  • The size of the force and
  • The smallest guide radius (operating or bend radius) 

The standard helix cable comprises:

  1. Core
  2. Helical/helix wire Ø 1.2 +/- 0.03 mm
  3. Flock yarn

 

 

Dimensions and tolerances for the standard helix cable for roofs and shading systems: 

A = outside diameter 4.7 +/- 0.05 mm
B = core diameter 2.6 +0.2 mm
C = pitch 2.54 +/-0.04 or 2.55 +/- 0.04 mm 

For a significant improvement of corrosion properties and further reduction of potential noise emissions, we recommend that the helix cables be oiled by GEMO.


The different technical properties of the helix cables are determined by the type of core used. The core can be a flexible shaft or a wire. The helical/helix wire is identical in the standard versions.

Flexible shaft core Multiple thin wires in three layers

Flexible shaft core Small number of larger diameter wires in two layers

Wire core High performance cable

  • Very flexible
  • Yield strength 800 N
  • Breaking strength 1900 N
  • Integrity of the helix: min. 1350 N
  • Standard
  • Yield strength 1350 N
  • Breaking strength 2200 N
  • Integrity of the helix: min. 1350 N
  • Strong
  • Yield strength 6700 N
  • Breaking strength 7000
  • Integrity of the helix: min. 1350 N
  • (very little elongation)

Flock/flock yarn

Flock yarns differ in terms of the:

  •  Thickness/strength of the carrier thread
  •  Length of the flock fibres applied
  •  Thickness/strength of the flock fibres
  •  Density in which the flock fibres are applied to the carrier thread.

Flock yarn is used for noise reduction purposes.

Sliding blocks as connectors

For adaptation purposes, helix cables can be supplied with moulded plastic fittings and/or metallic connectors or reinforcements. A small moulded cap on the other end reduces potential noise.

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