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igus® Ltd.

Caswell Road

Northampton, NN4 7PW

01604 677240

Calculation of e-chain®-lengths and camber

Calculation of e-chain® lengths

If the fixed end of the e-chain® is placed in the center of the travel, the chain length LK comes to half of the travel distance plus an extra K for the bending radius. The value K can always be gathered from the table in the catalog. The most cost-efficient solution is to always place the fixed end at the center of the travel, as less e-chains® and, in the majority of cases, less cables are required.

This formula is applicable in principle for all applications, if the fixed end lies at the center of the travel distance. Exceptions: Circular motions and most long travels.
This formula is applicable, if the fixed end lies beyond the center of the travel distance

The fixed end in the center of the travel is the most favorable solution

LK = Length of e-chain®
S = Travel distance
R = Bending radius
ΔM = Deviation from the mean
K = R * π + (2 x T)
(Please find K from the dimension sheets
of the individual igus® series)
H = Nominal installation height
HF = Required installation height


The economic use of the maximum possible unsupported lengths is governed by the parameters of design, material and pretension. Camber is the curve of the upper run along its unsupported length. All series of igus® e-chains® are produced with pretension. Under installation dimensions you will find the dimension HF, which gives the required installation height taking the pretension into account. Pretension results in longer unsupported lengths and increases the service life and operational safety. Upon request, we can deliver energy chains without camber for restricted space applications - however, these "no camber" chains do not have the same load-bearing capacity. Please consult igus®

Special "NC" EChains® with no camber also available. Please consult igus®

Necessary clearance height - depends on the camber of the e-chain®. Find values for the necessary clearance height "HF" on each product page.

Principle of pretension on igus® e-chains® HF = required installation space