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Two Row Cylindrical Axial Rolling Mill Bearings Double Counter C1 NNUP50120-2Z
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Two Row Cylindrical Axial Rolling Mill Bearings Double Counter C1 NNUP50120-2Z

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Two Row Cylindrical Axial Rolling Mill Bearings Double Counter C1 NNUP50120-2Z

 

Rolling Mill Bearings
WD four-row cylindrical roller bearingsare used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Their friction is low compared with other roller bearings. As they are normally mounted with an interference fit on the roll neck, they are particularly suitable for rolling mill applications where the rolling speed is high.
The low bearing cross section allows for relatively large roll neck diameters in comparison with the roll diameter. Since very many rollers can be incorporated, the radial load carrying capacity is exceptionally high.
WD four-row cylindrical roller bearings are only able to accommodate radial loads. They are therefore mounted together with deep groove or angular contact ball bearings, or with tapered roller bearings, either radial or thrust designs, which take up the axial loads.

Internal clearance: WD four-row cylindrical roller bearings are normally produced with the C3 or C4 radial internal clearance required for rolling mill bearings. Bearings mounted with a loose fit on the roll necks generally have C2 radial internal clearance

The clearance values, where standardized, conform to ISO 5753:1991 and are given in the following tables for bearings with cylindrical bore and bearings with tapered bore. They are valid for unmounted bearings under zero measuring load.

Tab1:
Radial internal clearance of WD cylindrical roller bearings with cylindrical bore:

 
 
Bore Radial internal clearance                
diameter
d		   C1 SPC2 C2 Normal C3 C4 C5
over incl. min max min max min max min max min max min max min max
 
 
 
mm µm                            
 
 
 
- 24 - - - - 0 25 20 45 35 60 50 75 65 90
24 30 5 15 10 25 0 25 20 45 35 60 50 75 70 95
30 40 5 15 12 25 5 30 25 50 45 70 60 85 80 105
                           
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Mr. David Huang
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270,Zhongshan Road, Nanjing, Jiangsu, China (Mainland)
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