Advanced Product Solutions

Ultra-Large Split
Spherical Roller Bearings

Conventional bearing replacement for BOFs and Converters can be an exhaustive and critically time-consuming enterprise, requiring extensive dismantling of surrounding equipment and components in order to access inboard bearing installations. With NSK’s split spherical bearing design, removing the bull gear and/or furnace tilt drive in order to gain access is eliminated, and actual bearing replacement is simplified. As result, maintenance time and costs are significantly reduced, as is the impact to productivity in subsequent processes.

And in this case, convenience does not come at a cost or compromise.

NSK Ultra-Large Split Bearings are engineered to operate with stability at high temperatures, accommodating heavy loads, low speeds and oscillating motion with predictably reliable efficiency.

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Proven Advantages

arrow-right-red Simplified, faster installation with split design
arrow-right-red Split bearings can be replaced without extensive dismantling, reducing maintenance time and costs
arrow-right-red Reduced downtime mitigates production loss in subsequent processes
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ultra-large-split-spherical-roller-bearings

Design Features

arrow-right-red Special design ultra-large split spherical roller bearing
arrow-right-red Inner and outer rings and roller / cage assembly are perfectly split, with the bearing ring halves held together with fastening screws
arrow-right-red Includes split fastening rings with a contact-type sealing surface
arrow-right-red Fastening ring is also used as a seal sliding surface

Designation System

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Bearing Dimensions and Operating Values

ultra-large-split-spherical-roller-bearings-illustrations
BASIC
BEARING NO.
BEARING DIMENSIONS BASIC LOAD RATINGS DESIGN
mm kN
d D B b b1 D1 Du r1 (min) r2 (min) Dynamic Static
750SLPT1051  750 1 000  250  355 --  905  914 6.0 7.5 6 800 18 300 1
SL850-7  850 1 120  272  385 -- 1 015 1 025 6.0 6.0 8 000 21 600 1
900SLPT1251  900 1 250  285  410 -- 1 100 1 142 7.5 19.0 9 850 24 200 1
950SLPT1451  950 1 400  300  520  600 1 182 1 265 7.5 28.0 12 300 27 900 2
SL1120-3 1 120 1 580  320  633  698 1 400 1 445 9.5 30.0 13 200 32 000 2
1200SLPT1751 1 200 1 700  410  780  780 1 470 1 536 9.5 31.0 17 300 43 500 2*
1200SLPT1752 1 700  410  660  730 1 470 1 536 9.5 19.0 17 300 43 500 2
1320SLPT1851 1 320 1 850  530  815  814 1 600 1 670 12.0 31.0 22 500 63 500 2
1400SLPT1951 1 400 1 900  530  880  880 1 680 1 710 12.0 31.0 22 800 65 000 2*
1400SLPT1953 1 900  530  810  860 1 680 1 710 12.0 31.0 22 800 65 000 2*

Bearing designs indicated 2* differ slightly from illustration

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