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Guardian Superflex Couplings for Portable Quarry & Mining Screens
A leading global manufacturer of vibrating screens and portable screening platforms used
at mining and quarry operations, needed a robust coupling solution that could withstand the
screen’s high-frequency vibration. A blind-fit coupling was required because the hydraulic motor
and vibratory screen shafts were enclosed in an adaptor housing. Material is fed onto the top
of the unit, vibration causes the material to move down as it drops through a series of several
screens with selected size mesh openings. The material is sorted based on the mesh opening
sizes, from larger openings in the top screen to smaller openings in the bottom screen.
The OEM consulted with Guardian engineers after testing three competitor coupling designs
without success. Upon careful review of the Guardian coupling choices available, the Superflex
coupling was selected due to it’s ability to withstand the harsh environment and stand up to the
severe shock and vibratory loading of the screen. Ultimately, a Superflex 27 unit was tested and
performed up to the customers’ expectations.
The Superflex coupling consists of two steel hubs and a 55 duro, shore “A” super-elastic
flexible rubber element. Once installed, the rubber element expands from its original prestressed
condition. As a result, it’s torsional load is influenced favorably, permitting lower
tensile stress and higher vibratory torque load. The Superflex Model 27 features a nominal
torque capacity of 2,390 in.lbs. (6549 in.lbs.) and provided additional misalignment capabilities
required by the customer.
The Superflex’s successful integration and long lasting performance on the initial screen model
led the OEM to specify the coupling on several more models within their product line.
- Super elastic flexible rubber
element of 55° shore “A”
- Nominal torque capacity:
2,390 in.lbs. (6,549 in.lbs.)
- 5,000 RPM max. speed
- Nominal angular