# 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:

If the supply point is outside the centre, the formula for calculating the chain length is as follows:

K = π x R + (2 x T)

L_{k} = 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:

**L _{k} =
S/2 + K_{2}**

K_{2}
= 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.