Danieli Refurbishes Mill Stand Pinion Gearboxat Nucor Gallatin HSM
Mill Stand Pinion GearboxDanieli

Danieli Refurbishes Mill Stand Pinion Gearboxat Nucor Gallatin HSM

Danieli Service Center in Coraopolis in Pennsylvania in USA delivered to Nucor Steel Gallatin a fully refurbished original F2 rolling mill stand pinion gearbox,

Danieli Service Center in Coraopolis in Pennsylvania in USA delivered to Nucor Steel Gallatin a fully refurbished original F2 rolling mill stand pinion gearbox, part of the six-stand hot-strip finishing mill. Danieli rolling mill experts reverse-engineered the original pinions for remanufacturing, which was executed at Danieli Headquarters’ specialized gear manufacturing center in Italy. The pinions were re-designed to improve teeth contact and load capacity. The new design increases the mill safety factor by 30% by implementing of different gear parameters. Additional improvement on contact pressure distribution has made it possible to decrease local contact pressure by 40% thanks to specific teeth corrections.

Gearbox body was overhauled to recover the original geometry: bearing seats has been recovered by re-machining the area and installing new bushings, which allowed perfect contact pattern. Furthermore, new double-tapered roller bearings have been installed in place of the original, spherical ones, increasing service life by approx. 10%. After reassembly of the parts, the gearbox was run tested and vibration analysis proved the proper frequencies. Danieli Service specialists supported Nucor Steel Gallatin with accurate on-site alignment.

In the USA Danieli operates two refurbishment centers, in Coraopolis in Pennsylvania and Ashland in Kentucky.

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