Advanced Product Solutions

Sendzimir Back-Up
Roll Bearings

With the demands for precise thickness tolerance and optimal surface finish of plate and sheet metals becoming increasingly stringent, the expectations placed on the back-up bearings used in Sendzimir / multi-roll cold rolling are similarly high. Not only must these bearings withstand the heavy and impact loads transmitted, but they must run with high rotational accuracy to ensure dimensional quality of the end product.

NSK’s back-up roller bearings for cluster mills are engineered with the requisite ring strength and running accuracy to support precise plate and sheet making. With advanced options including our long-life STF steel and innovative seal design, they withstand heavy loads and lubrication challenges to deliver a long and reliable service life.

Proven Benefits

Significantly longer fatigue life under heavy loads and severely compromised lubrication conditions with STF and EP material options
Optimized seal design for oil-mist / oil-air lubrication conditions
Lower seal contact force allows for higher speed operation with reduced seal wear
High rotational accuracy
Higher reliability, longer life and reduced bearing consumption

Design Features

Special design high capacity cylindrical roller bearings
Featuring inordinately thick outer rings, which serve as the back-up roll
Available in three-row or double-row designs with machined brass cages
Advanced seal design option available for double-row bearings
Available with Extra-Pure (EP) or Super-TF material options for extraordinarily high endurance
With matched-set radial internal clearance
Special tolerances for precision running accuracy

Designation System

Bearing Dimensions and Operating Values

2U55-1 55.004 120.016 64 63.2 -  182 4
2U55-3 55 119.1 52.2 52 32.05  151 2
3PL70-1 70 160 90 90 45  410 1
2U80-5 80 220 130 120 69.968  625 6
2U90-14 90 220 94 94 65  630 3
2U90-11 220 120 119 65  680 4
2U90-13 220.02 96 94 65  520 4
2PL100-3 100 225 80 80 62.47  535 3
2U100-16 225 100 100 62.48  575 5
2U100-17 225 120 119 62.5  550 2
3PL100-1 225 120 120 62.47  715 1
2U110-12 110 260 98 98 75  625 4
2U130-32 130 300 132 129 85 1 000 4
3PL130-2 300 160 159.5 84.95 1 470 1
3PL130-7 300 172.64 172.64 84.95 1 540 1
2U130-37 300 172.75 169 85 1 170 4
2U130-34 300.02 150 149 85.01 1 100 2
2U130-23 300.02 160 158 85.01 1 290 4
2U130-17 300.02 172.65 171.6 85.01 1 370 4
2U180-2 180 406.42 171.04 170 113.2 1 850 2
2U180-5 406.42 171.04 170 113.2 1 650 4
3PL180-3 406.42 171.04 171.04 113.155 2 000 1
2U180-7 406.42 171.04 171.04 113.155 1 520 6
3PL180-2 406.42 224 224 113.155 2 610 1
2U180-4 406.42 224 224 113.16 2 360 2
2U190-5 190 380 112 110 94.95  875 6
2U190-4 380 142 140 94.95 1 210 6

Additional bearing sizes are available. Please contact NSK for additional information.