How do I calculate the chain length for my supply?
The chain length calculation (only in German) is made for an unsupported or gliding application.
Unsupported:
![](https://blog.igus.de/wp-content/uploads/2019/07/q.png)
If the supply point is outside the centre, the formula for calculating the chain length is as follows:
![](https://blog.igus.de/wp-content/uploads/2019/07/qq.png)
K = π x R + (2 x T)
Lk = length of the e-chain
S = length of travel
S/2 = half length of travel
R = bend radius
ΔM = deviation from the centre point
K = add-on for bend radius
Gliding:
![](https://blog.igus.de/wp-content/uploads/2019/07/w-1024x281.png)
Lk = S/2 + K2
K2 = add-on (with lowered moving end)
The e-chain glides on one half of the lower run and on the other half on a glide bar, as shown in the picture above.