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Backing bearings ( Back-up bearings )

Backing bearings ( Back-up bearings )

FV backing bearings are available in many designs and variants. The main assortment is based on double or three-row cylindrical roller bearings. Backing bearings have been specially developed for cold rolling mills of the cluster type, but can also be used for other applications, such as straightening or bending machines. These bearings have a particularly thick-walled outer ring and can be mounted on stationary support shafts to form backup or straightening rolls.

FV backing bearings are available in many designs and variants. The main assortment is based on double or three-row cylindrical roller bearings. Single row needle roller bearing and double row tapered roller bearing designs are also available.

Back-up rollers Multi-roll cold mill stands are described using different terms  depending on their type and manufacturer:

■ 12 and 20 roll stand

■ Z-High.

■ S-High.


Multi-roll cold rolling mills are used to process high grade steel  strip and non-ferrous metal strip. In order to prevent whipping of the work rolls, they are supported by means of intermediate  rolls and support shafts. Several back-up rollers are arranged  adjacent to each other on these support shafts and separated by support saddles. These allow the requisite distribution of roll load. Depending on their type, back-up rollers can support high radial forces or high radial forces together with axial forces that are transmitted to the stand via the adjacent construction.


Sendzimir mill bearing, Back-up Roller bearing - (Replace FAG) WWW.FV-BEARING.COM


Sendzimir mill bearing, Back-up Roller bearing - (Replace FAG) WWW.FV-BEARING.COM

The quality of the rolled metal sheet is determined not only by the bending rigidity of the entire support shaft but also the section height tolerance, running accuracy and surface  quality of the outer ring outside surface of the individual back-up rollers. Back-up rollers


 ■ are manufactured with restricted tolerances ■ have a running accuracy better than P4

 ■ are classified in three to seven section height groups each of 3 um to 5 um

 ■ are suitable for high loads

 ■ are suitable for high strip speeds, up to 1000 m/min  depending on operating conditions

 ■ are manufactured in 3 types. These specific characteristics ensure the necessary surface  quality and flatness of the rolled products. As a result, sheet metal can be produced economically to very fine  thickness tolerances and optimum surface quality.


Backing bearings have been specially developed for cold rolling mills of the cluster type, but can also be used for other applications, such as straightening or bending machines. These bearings have a particularly thick-walled outer ring and can be mounted on stationary support shafts to form backup or straightening rolls. Pic shows the arrangement of the backing bearings on the eight support shafts of a 20-roll mill.



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https://www.fv-bearing.com/news/62-en.html

Principal dimensions [mm]Basic load ratings [kN]Fatigue load limit [kN]Maximum radial loads [kN]Designation

dynamicstatic
dynamicstatic
DdH max.BCCCoPuFr max.For max.
1205532.49352.25212327536224315396040
1205532.496262658.39811.6108153610627 B
1607044.982909035858580315455315268 B
1607045908927034545.5250365BCZ-0525 B
1657047.5908829739052285415BCZ-0529
1657047.512011831446561355510BCZ-0503 AA
2209064.97912012050175090415585316737 AC
2209065969445755068335480BCZ-0508
220906512011948464078440630BCZ-0507
220906512211946860072440630BCZ-0512
22510062.479808041862075380550BCZ-0514
22510062.4791201206601120137560800315018 C
22510062.4791201206601120143560800315018 A
22510062.48112011953973588405570BCZ-0075 A
22510062.48112011959481598400570BCZ-0011
22510062.48512011850169585475670BCZ-0509
22510062.5120120660980116450640BCZ-0513
2501306010610352873580390550BCZ-0052
26011074.98989861680091.5335475BC2B 322564
26011074.9811010956169580440630BCZ-0504
2801108513012876510601259001290BCZ-0113
2801108513012876510601259001290BCZ-0113 A
280120801601588091340
8501220BCZ-0034 A
30013084.965160159.5108016301807651100319028 A/HA2
30013084.965172.64172.64117018002008301180314833 B
30013084.965172.64172.64117018002008301180314833 BC
30013084.98172.65172.65114014601637801120BCZ-0532/PEX
30013084.98172.65172.65114014601638151160BCZ-0532 A/PEX
30013084.9851321298801160129500710BCZ-0517 A
300.0213084.988172.65171.6108015001706951500BC2B 320432 AE
406.42180113.155171.04171.041510232024011801660316388 AB
406.42180113.1552242241900310032015302200315515 AB
520205157.4451681682090290027019002650BCZ-8004




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