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DEMM Engineering & Manufacturing - - NEWS -

FAG self-align­ing cylin­dri­cal roller (SACR) bear­ing in­stal­la­tions by Scha­ef­fler Aus­tralia have in­creased pro­duc­tion time and re­duced down­time by solv­ing a lu­bri­ca­tion and pre­ma­ture fail­ure is­sue for one of the world’s lead­ing pack­ag­ing, pa­per and re­cy­cling com­pa­nies, Visy Pulp and Pa­per.

The $1bil­lion Visy Tu­mut Kraft Pa­per plant in NSW re­placed orig­i­nal toroid roller bear­ings in the plant’s dryer sec­tion, ten­der side, with FAG SACR bear­ings, which are part of a spe­cialised pa­per mill bear­ing range en­gi­neered to re­li­ably with­stand the of­ten ar­du­ous op­er­at­ing con­di­tions.

A to­tal of more than 20 of the FAG SACR 565688K.C5.W209B bear­ings have been in­stalled in place of the for­mer roller bear­ings used at Tu­mut, which had to be re­placed ev­ery twelve months.

Dur­ing the first five years’ op­er­a­tion of the new SACR bear­ing, no re­place­ment was nec­es­sary. Sav­ings over the first five years were es­ti­mated at more than $A650, 000,” said Scha­ef­fler Aus­tralia Pty Ltd – Pulp & Pa­per Sec­tor Man­ager Mr David Dickie.

Chal­lenge for Scha­ef­fler

Be­cause the dryer sec­tion ten­der side bear­ings were pre­ma­turely fail­ing due to lu­bri­ca­tion is­sues, Visy re­quested as­sis­tance from Scha­ef­fler Aus­tralia to solve the prob­lem. Scha­ef­fler Aus­tralia – which mar­kets the FAG, INA and Luk brands – is part of the Global Scha­ef­fler or­gan­i­sa­tion, which em­ploys more than 82,000 peo­ple, in­clud­ing more than 6,000 at 16 re­search and de­vel­op­ment cen­tres ded­i­cated to high-per­for­mance, low-main­te­nance bear­ing tech­nol­ogy. Scha­ef­fler bear­ings are backed in Aus­tralia by prod­uct se­lec­tion and pack­ag­ing so­lu­tions, in­stal­la­tion ex­per­tise, on­line con­di­tion mon­i­tor­ing, and lu­bri­ca­tion tech­nol­ogy for op­ti­mal per­for­mance. Ex­perts from Scha­ef­fler Aus­tralia pro­vided Visy Pulp and Pa­per with a tech­ni­cal so­lu­tion rec­om­mend­ing the FAG SACR bear­ing with cen­tre feed lu­bri­ca­tion setup. A six -month test­ing phase fol­lowed, dur­ing which an ap­pli­ca­tion en­gi­neer from Scha­ef­fler in­stalled the first SACR bear­ing.

Ma­jor steps in the process in­cluded:

• Dis­mount­ing of the orig­i­nal bear­ings.

• Drilling of lu­bri­ca­tion hole.

• In­stal­la­tion of a 5mm in­board spacer.

• Mount­ing of SACR bear­ings of 120mm width, 220mm bore di­am­e­ter, and 370mm out­side di­am­e­ter.

• Mod­i­fy­ing of the in­ter­nal spigot of the hous­ing end cover.

• Re­con­nec­tion of oil in­let and out­let pipework.

Cus­tomer Ben­e­fit

“Not only did the FAG SACR bear­ing in­crease pro­duc­tion time and re­duce down time, but also the tech­nol­ogy de­liv­ered unique fea­tures valu­able to man­u­fac­tur­ing,” says Mr Dickie. “The bear­ing can han­dle mis­align­ment and ther­mal ex­pan­sion, for ex­am­ple. The in­ner ring can be off­set to the outer ring prior to ma­chine start up, to al­low for such ex­pan­sion.

“An ad­di­tional ben­e­fit is that this so­lu­tion has min­imised vi­bra­tion lev­els and de­creased op­er­a­tion tem­per­a­tures.”

Cost sav­ings

“The so­lu­tion can also be ap­plied to other pa­per ma­chines if is­sues arise in the dryer sec­tion ten­der side set­ups. The FAG SACR bear­ing is a retro­fit so­lu­tion which can re­place spher­i­cal roller bear­ings (SRB) with­out any change in the lu­bri­ca­tion in­take.”

FAG SACR ready for work­ing

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