60°
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Franke Innovativ 06/2009
The Franke principle as a film:
www.franke-gmbh.com
Robot arms have to be mobile enough to be able to accept loads from all
directions. The Franke four-point system fulfils this requirement in the
best possible way. In addition to the necessary freedom of movement, it
simultaneously warrants a high degree of stiffness.
Five Millimetres That Are Moving Something Big
Examples for the application of the LEG: robots, pick & place / handling and industrial gears
Antifriction Bearings must also fulfil
two extra important criteria in robots
and industrial gears: they should
be lightweight and compact enough
to fit into a minimal mounting space.
In every regard, the LEG
bearing
element by Franke fulfils all these
required properties. It replaces a
leading grooved ball
bearing without
requiring an additional clamp for the
inner ring. The LEG can be adjusted
with a screw-thread ring which simultaneously
functions as a cover.
To meet the requirement of minimal
mounting space, we have reduced
the
bearing to a mere 5-mm overall
width. The
bearing cross-section remains
the same across the entire
diameter range – from 100 mm to
500 mm ball pitch. Also in terms of
its weight, the LEG is nearly unbeatable
(60% lighter than a leading ball
bearing).
Tell us about your intended application
– we will gladly offer you a
consultation!
A leading gear
bearing with
a ˝ ˝ slim
bearing
(on a scale of 1:1)
Possibilities with the new LEG
bearing element
(on a scale of 1:1)
2 ball race rings,
each with 2 raceways
Rolling element
Four-point contact
Angle support: 60°
Plastic rolling element
cage
Robots
Pick & Place,
Handling
Industrial gears
Four Points, Numerous Applications
The “Franke Principle” as the basis for success
Franke products are based on a
particular principle: four rings with
a profiled raceway. These form the
basis for all applications: in
Antifriction Bearings and Linear
Systems.
Franke Antifriction Bearings consist of
four race rings, balls, a ball cage – and
upon request, a mating structure.
The race rings are processed with a
specific grinding process developed
by Franke, and precisely adjusted
to the corresponding
ball diameter.
4 race rings
Rolling elements
Rolling element cage
This enables a low-friction roll process
on the four open race rings.
The Franke principle is also
applied to Linear Systems. This
patented system with a guided
roller enables the optimum
guidance of the rollers on four
raceways in the guide rail.
The four-point contact enables
consistent load acceptance from
all directions; this applies to both
Antifriction Bearings and Linear
Systems.
