Product category:
Bearings and guideways - rotary and linear
News Release from: Schaeffler (UK) | Subject: Large split bearings
Edited by the Manufacturingtalk Editorial
Team on 04 April 2007
Large split bearings replaced on steel
mill
The replacement of large, split spherical roller bearings on a critical, 140-tonne steel mill converter have been replaced within three days by FAG Industrial Services.
FAG Industrial Services (F'IS) has successfully completed the replacement of large, split spherical roller bearings on a critical, 140-tonne steel mill converter within three days FAG Industrial Services (F'IS), the maintenance and condition monitoring services division of the Schaeffler Group, has successfully carried out important maintenance work on the trunnion bearings on a 140-tonne steel mill converter at ThyssenKrupp's steel production plant in Terni, Italy
This article was originally published on Manufacturingtalk on 21 Aug 2008 at 8.00am (UK)
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While most of the plant's 3,500 employees were enjoying their annual Summer shutdown in 2006, engineers from F'IS set about replacing the large, heavy, split spherical roller (trunnion) bearings on one of the plant's two, 140-tonne high-grade steel converters.
The shutdown is normally used to carry out important maintenance work, including relining and modification of the two mill converters.
ThyssenKrupp's fitters initially dismounted the drive and bull gear (a toothed gear wheel that enables tilting of the converter) on one of the converters, then took the opportunity of calling in F'IS engineers to do some preventive maintenance on the FAG-supplied trunnion bearings.
Hermann Eussner, chief fitter at F'IS comments: "Prepared down to the very last detail and perfectly organised, the bearing replacement was carried out according to schedule within three days." The bearings on the converter are from Schaeffler's FAG range of split spherical roller bearings.
With an outside diameter of 1,180mm, a bore of 900mm and a weight of 800kg, these bearings are designed to withstand the high forces acting on the pressure ellipse of the loaded roller and the outer ring, which measures just a few square centimetres.
The bearings also have to withstand extremely harsh conditions - high operating loads, dirt and high temperatures.
FAG split spherical roller bearings are mainly used for applications in which the replacement of an 'unsplit' spherical roller bearing would require intricate additional work.
For example, where gearwheels or couplings have to be withdrawn, drives dismounted or shafts disassembled.
With split spherical roller bearings, assembly is simplified and mounting made easier, therefore the costs of production downtime, particularly on heavy plant and machinery, are reduced. Request a free brochure from Schaeffler (UK) ...
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