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Distribution rules | Cables and hoses

Pneumatic hoses
In principle, the rules for round cables also apply
to pneumatic hoses. In practice, it has been ● Pneumatic hoses
demonstrated that pneumatic hoses are less The igus ® program also off ers
susceptible to wear. After consultation, they polymer pneumatic hoses
can be laid together more closely than the 10% called chainfl ex ® Air
clearance rule allows. This requires double-sided ● Flat cables
strain relief. For pneumatic hoses made of rubber, Outer jackets made of
we recommend that the 10% clearance rule rubber must be specified
be strictly followed because these hoses tend particularly carefully, because
to stick to each other and to other cables and of potentially high friction
hoses. ● Hydraulic hoses
Hydraulic hoses need more
Flat cables space: 20% all-around
It is especially important for fl at cables to move freely clearance. We recommend
at the bend radius. Two adjacent fl at cables should Fully pre-assembled e-chain system ® with e-chains ® with crossbars
be kept apart with separators. If two fl at cables are several pneumatic and hydraulic hoses every link to distribute the
laid on top of one another, we strongly recommend force of the hoses over
horizontal interior separation. Flat and round cables should be laid separately in the e-chain ® . There more crossbars!
should be strain relief at both ends. Flat cables are only recommended to a limited extent for use in
e-chains ® .

Hydraulic hoses
During planning, pay special attention to longitudinal and transverse expansion when the hoses
are pressurised. We recommend e-chains ® with crossbars every link to distribute the force of the
hoses over more crossbars. Suffi cient room must be left (20% clearance). It is important for selected
hoses to be suffi ciently fl exible (they must bend in the specifi ed radius). The surface of the hoses
must also be abrasion-resistant and able to glide. The igus ® interior separation elements minimise
hose abrasion with their wide, smooth, rounded contact surfaces. Hoses with textile braiding are
usually more fl exible than those with steel wire braiding. Because lateral hydraulic hose movements
within the e-chain ® can lead to increased abrasion in the hose material, hoses should be secured
in position with vertical separators, and jamming must be avoided. Notch separators that snap
into the crossbar, for example, keep the hoses fi rmly in place in the e-chain ® even if there is strong
vibration and shocks.
Strain relief
Hydraulic hoses are most often stretched lengthwise during operation. This must be taken into
account when strain relief is applied. More hose length can be factored in or strain relief implemented.
In some cases, one-sided strain relief on the moving end can be tolerated.

rollclip Drastically reduce the jacket
In almost all cases, the broad, smooth, rounded contact surfaces of all igus ® e-chains ® /e-tubes are abrasion of very stiff cables
suffi cient to protect hydraulic hoses from abrasion. In extreme cases, the rollclip can be subsequently and hoses with the E4.1 roller
installed. In the crossbar, the hoses come into contact with a series of plastic cylinders which rotate crossbar. The rolling contact
with them. Extreme cases include particularly soft jacket materials, particularly small bend radii, surfaces with tribo-optimised
and highly dynamic loads. Our experience shows that over 95% of all applications can be solved plain bearings increase the
without rollclips. service life considerably.

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