Tensile strength test report of robolink® wires

robolink® wires were tested for tensile strength on the ZWICK tractor (nominal tensile strength > 3600 N).
The nipple connection was fixed with different adhesives (see installation instructions for the wires). The experiments were carried out at room temperature and at 80°C.





 Wire with brass nipples  Section of the mounted nipple

Test results:  

Wire fixed with: Breaking strength at RT Breaking strength at 80°C
1) Loctite 401 > 1.400 N >   800 N
2) Loctite 406 with primer > 1.300 N >   700 N
3) Loctite 4204 > 1.900 N > 1.400 N
4) Loctite 4204 with primer > 1.400 N > 1.000 N


igus® recommends the use of Loctite 4204 for installation of the wire nipple, especially because the use of wires/joints results in increased temperatures.


An important issue even today. What is tolerance? Who defines the tolerance? The tolerance is directly related to truth and freedom …

Before I become philosophical here … Back to pikchain®:

One of the questions about pikchain® that keeps coming back: How high is the tolerance of pikchain®, and the positional accuracy?

Well, the pikchain® has a positional accuracy of about 1 mm. The size is similar in width, maybe a bit less, but again we need a certain buffer so that the chain can still proceed freely and does not clamp.

Do you want to have a lower tolerance? Do you want to position more accurately?
Of course, the pikchain® can also become intolerant, or it can be positioned precisely in all axes.

It would then work, for instance, like this:

In order to obtain a desired position tolerance in height and width, the tool holder on the pikchain® is spring mounted. This tool holder is given a running carriage, which in turn enters into an adjustable roller guide. This roller guide is set for the desired tolerance once. Ready!
See also drawing.

We also have a solution for the positional accuracy in the longitudinal axis. The above-described tool holder gets a lateral bore into which a position mandrel can enter from the outside and keep the chain in position during the operation of the corresponding tool (e.g. drills). Ready!

You see: If we want, we can be damned intolerant. Otherwise we remain tolerant, freedom-loving Rhinelanders!


Just before the positioning  In Position!

  1. Guide roller unit
  2. Guide roller unit
  3. Guide pin
  4. Insertable carriage
  5. Positioning hole
  6. Spring-mounted tool holder

What options are available in triflex® R and what are the advantages of each?



TRC version
The TRC version has an enclosed design – cables and hoses are protected from damage through external factors such as chips or welding spatter. The following sizes are available:

TRC.125.182.0 (*)


TRE version
The TRE version has an “open design” with the igus® easy chain® system. Cables and hoses can be later inserted from the outside. This has inter alia the advantage that cables and hoses – with assembled connectors or fittings can be inserted or replaced in a flash in the TRE. The TRE version can be extended and shortened very easily, which can be done without tools. The following sizes are available:

TRE.125.182.0 (*)


TRE-B version

The TRE-B version is an enhanced version of the TRE version. An additional stop dog on the “ball” prevents the ball from jumping out of the socket connection in heavy loads – thus we arrive at an approximately 4-fold higher bend-radius stability in comparison to the TRE version. The dismantling of the TRE-B version is performed by a tool that we deliver with the goods. The TRE-B version is the new standard in the RS and RSP pull-back systems. The following sizes are available:



TRE-C Version
The TRE-C version is a special model for very demanding applications. The advantages of TRE-C version lies in the ease of installation and stability. The filling with cables and hoses is identical to the TRE and TRE-B versions. The separation of the TRE-C version is executed by the unlatching and pushing out a locking pin – the joining of the TRE-C version is just as simple.
The following sizes are available:

(*) The TRE.125.182.0 and TRC.125.182.0 are designed according to the TRE-C system, but is not marked with the suffix “C” in the part number.


TRL version
The TRL version is our “light” version and is suitable for simple applications. The TRF consists of a 3-chamber design in conjunction with igus® easy chain® system. The tensile forces are transmitted like in TRC and TRE, through the ball and socket joint “trailer principle”. The TRL is the lowest priced.
The following sizes are available:


Why triflex® R and no protective hoses …

The triflex® R energy supply system was developed for sophisticated robotic applications and compared to the protective hose, offers the following technical advantages.

 Why triflex® R and no protective hoses ... 1. Defined minimum bending radius
Each triflex® R chain link has a stable circumferential bending radii stop. This ensures that the minimum bending radius of cables/hoses doesn’t fall short and the service life of the application is significantly increased.
Why triflex® R and no protective hoses ....2 2. Defined torsion stop
Every triflex® R chain link has a defined torsion stop. This prevents the cables and hoses from being overloaded during operation. Thus, the lifetime of the application is significantly increased.
Why triflex® R and no protective hoses ....3 3. Modular design
All triflex® R type series and sizes follow a modular system. Thus each triflex® R energy supply system can be extended and shortened. Any desired length can also be retrofitted – individual triflex® R chain links can be used or removed at any position.
Why triflex® R and no protective hoses ....4 4. Ideal cable routing
By the 2- or 3-chamber system, a spatial separation of the cables and hoses can be implemented. Different cables and media can be securely routed, separated from each other.
Why triflex® R and no protective hoses ....5 5. High tensile strength through trailer system
Each TR chain link has a “ball/socket connection”. The push/pull forces are transmitted through this connection. The “ball/socket connection” is based on the “trailer” principle (similar to a trailer hitch), which absorbs very high forces.