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Nuttall Gear Custom Flattener Drive for Steel Processing Line
A large steel producer needed a new gear drive for a flattener on one of their
processing lines. Direct coupled to a 500 HP motor, the large gear reducer drives a
series of nine de-tensioning rollers that relieve residual stresses as the strip steel gets
pulled through them during the sizing of the coil.
Nuttall Gear was selected to provide a custom-engineered gear drive solution over
several competitors based on their history of exceeding customer expectations and
building heavy-duty steel mill gear drives that last longer than others.
Nuttall engineers designed a drive to meet the customer’s performance requirements
including specific center distances between shafts and a unique shaft arrangement
configuration. A thorough understanding of the load requirements on the multiple
shafts ensured proper shaft sizing.
The custom Nuttall drive featured a 4.5:1 reduction ratio with 650/1200 RPM input
and 140/260 RPM output. To meet a special lubrication requirement for this particular
application, Nuttall engineers developed a circulating oil system for the upper gearing
and bearings that are not submerged in oil.
- 4.5:1 reduction ratio
- 650/1200 RPM input;
140/260 RPM output
- Fabricated steel housing
- Motorized circulating