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Double
width shaft
collars are able to sustain higher axial and torsional loads
than standard versions because they have additional cap screws
to apply pressure to the shaft, and due to the greater shaft
surface contact afforded by their extended length. This makes
the double width shaft collars particularly suitable as
mechanical stops or on split hubs, when a single collar does not
provide sufficient strength.
All
Ruland shaft collars are single point faced to ensure
perpendicularity and proper alignment. Ruland uses forged socket
hardware in all its shaft collars. This allows for higher screw
torque resulting in increased holding power.
Ruland
has designed its double width shaft collars with a cross cut, so
as to facilitate their use as a compact rigid coupling. The
cross cut enhances the holding power of the coupling, when there
is a small variation in shaft size due to tolerances.
In
general, rigid couplings are suitable when no misalignment is
present, and when high torsional strength, zero backlash and
maintained alignment are desired. The compact design of these
double width collars reduces inertia, an important consideration
in motion control applications, and also makes them ideal when
space is limited.
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