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igus® terms in alphabetical order


Unsupported - short travels

Gliding - long travels

Vertical hanging

Vertical standing

Infinitely revolving applications

Zig-zag applications


Rotary motion

Horizontal + vertical application


Side by side

Combined motions

Short cuts and formula of this catalog

Short cut   Describtion  
α = Rotation angle [°]
ΔM = Deviation from the mean [mm]
a = Acceleration [m/s2]
AR = e-chains® outer radius [mm]
Ba = Outer width of e-chain® [mm]
Bi = Inner width of e-chain® [mm]
BRa = Outer width of guide trough [mm]
BRi = Inner width of guide trough [mm]
D = Projection e-chain® radius in final position [mm]
D2 = Projection for long travels gliding [mm]
FLB = Unsupported length with permitted sag [m]
FLG = Unsupported length - straight [m]
FLU = Unsupported length without support for the lower run [m]
FZmax = Maximum additional load [kg/m]
H = Nominal installation height [mm]
H2 = Installation height with lowered moving end [mm]
ha = e-chains® external link height [mm]
HF = Required installation height [mm]
hi = Inner height of e-chain® [mm]
HRa = Outer height of guide trough [mm]
HRi = Inner height of guide trough [mm]
IR = Inner radius, e-chain® [mm]
K = Add-on for bending radius [mm]
K2 = Further add-on if the mounting bracket location is set lower (for long travels) [mm]
LK = Length of e-chain® [mm]
n = Number of links [1]
nKit = Number of installation kits (left/right) [1]
nRi = Number of guide channel sets (left/right) [1]
R = Bending radius [mm]
RBR = Reverse bending radius [mm]
S = Travel distance [mm]
S/2 = Half the length of travel [mm]
T = e-chain® pitch [mm]
v = Speed (travel) [m/s]
X1 = Inner machine installation space (twisterchain) [mm]
X2 = e-chains® outer radius incl. clearance [mm]

Formula   Describtion
SFLB = 2 * FLB = Calculation of maximum travel length, unsupported with sag
SFLG = 2 * FLG = Calculation of maximum travel length, unsupported straight
BRI ≥ Ba + 5 = Calculation of the minimum guide trough width
HRI ≥ 2 * ha = Minimum height of guide channel on gliding application
K = π * R = Add-on for bending radius
LK = S/2 + ΔM + K = e-chain® length, fixed end outside the
center of the travel distance (on FLG, FLB and ΔM)
LK = S/2 + K = e-chain® length, all installation types, fixed end in the center of the
the travel distance, except circular motions and most long
travel distances (on FLG, FLB) [m]
LK = S/2 + K2 = Calculation of chain lengths for long travels,
fixed end in the center of travel