As result, differentiate among three types unsupported length:
1. Unsupported with
permitted sag FLB
3. Unsupported with
straight upper run FLG
2.igus. igus® e-chains® are very well suited for high dynamics and long service life.
They are essential for:
● Findingasuitablee-chain®
for your fill weight and
travel distance
● Identifying the maximum
load for the selected
e-chain®
What the unsupported length insufficient?
If your application, fill weight and travel fall outside the unsupported length parameters the
desired e-chain®, you have the following options:
● Select stronger igus® e-chain®
● Support the e-chain® the unsupported area. most applications the e-chain® can
be used unsupported FLB without any problems. The unsupported application is
the most common.
More information www.
3. Applications may reach critical sag after long service times. Critical sag
When the sag the e-chain® higher than allowed for FLB, critical sag. The overall straight, unsupported travel can increased
here maximum 50% the FLG and case option maximum 100%
Support the FLB area.eu
Unsupported Short travels
Example for unsupported straight FLG
Unsupported Short travels
For every igus® e-chain®
or e-tube, you will find the
valuesforFLG andFLB intwo
locations: the following
pages this chapter an
overview and within every
individual series’ chapter.
The maximum unsupported length depends the fill weight and the type e-chain® e-tube. Using e-chain®
in critical sag should avoided solved with special solutions. Unsupported with straight upper run FLG
Thee-chain® isunsupportedFLG whentheupperrunstillhascamber,isstraightorhasamaximum
sag 1/2 the e-chain® link height.
3. values for speed and
acceleration
1. The e-chain®
or e-tube should replaced these cases. This option means restrictions for acceleration,
speed and noise consequence three fundamental examples are detailed below -
please consult igus® you are considering this possibility will gladly provide you with a
detailed proposal
● Use multiband e-chain® nest two igus® e-chains® inside one another. Critical sag
Unsupported
If the upper run the e-chain® operates without touching the lower run over the entire travel, is
called unsupported application.igus. Installing the e-chain® FLG always recommended.
2. The
e-chain® runs smoothly without additional vibration. The overall travel distance can extended to
a maximum 100% from FLB
3D CAD, configurators, service life calculation and more www.eu
. The distance between moving end and the beginning the
radius curve the e-chain® called the unsupported length.
2. There are restrictions concerning the maximum
speed and acceleration.
The FLG type installation
always generates the
longest service life and
can operated with the
max. e-chain® should never be
installed with critical sag.117
116
C
2
x
R
1/4 S
2
x
R
1/4 S
1/6 2/6 S
A B
R R
S
H
F
H
FLG FLB
S
H
H
F
S/2 S/2
R
R
1. (Please consult igus®)
● Design the travel distance gliding application
Example unsupported with sag, FLB
Support the FLG area. Unsupported with permitted sag FLG
The e-chain® unsupported FLB when the sag more than 1/2 e-chain® link height and less
than the smallest available radius this e-chain® series
