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NOTES:
This series of flexible shafting has been specifically formulated for heavy duty
service and uniform torsional balance in both the wind and unwind conditions. Although the
core is formulated to provide bi-directional operation, some variation in load carrying
capability inherently exists between the wind and the unwind rotation directions. All data
is based on the unwind (weakest) condition. Bear in mind that flexible shafting inherently
has higher ultimate strength and greater torsional rigidity above the proof load in the
wind direction.
BREAKING LOAD is the point at which a shaft will break or helix to the point of
permanent deformation, rendering the shaft unusable.
PROOF LOAD is within safe yield tolerance for static-manual torque application.
STATIC-MANUAL CAPACITY is based on rotational speeds not exceeding 100 RPM and
provides no corrective allowance for dynamic shock or inertial loading.
DYNAMIC capacity is based on intermittent (20%) duty cycle not exceeding 30 second
duty duration for high speed operation or up to 50% duty cycle not exceeding 2 minute
duration at low speeds. A minimum factor of 1.5 should be added to the maximum operating
torque to accommodate starting inertia. All data is based on a maximum acceleration rate
of 12,000 RPM/SEC. Higher acceleration rates and rotational speed dictate a greater
correction factor due to possible self induced oscillation of the shaft. Increases in RPM,
friction, spring rate and inertia may greatly increase the stress peaks and seriously
degrade dynamic life expectancy.
Values are based on compatible casing size, lubricated core and recommended support
intervals.
Data is to be used as a guide.
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