Steel Roll Mill T emperature Monitoring Online Monitoring Averts Major Gearbox Failure NUCOR Steel Arkansas undertook a major upgrade to its gearboxes driving the F1 and F2 mill stands. The upgrade represented a capital investment of nearly $24 mm. Due to the low speeds of these very large machines, traditional vibration monitoring was of questionable value. However, monitoring of the bearing temperatures in these massive gearboxes was recommended by the gearbox OEM. The company used Azima’s SPRITE i1600 network based temperature monitoring technology to all 16 bearings in the gearboxes. This advanced technology allowed for trending, alarming and immediate notification of both Azima experts and relevant plant personnel. The system was commissioned in July of 200

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