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.
Proven Advantages
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Simplified, faster installation with split design |
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Split bearings can be replaced without extensive dismantling, reducing maintenance time and costs |
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Reduced downtime mitigates production loss in subsequent processes |
Design Features
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Special design ultra-large split spherical roller bearing |
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Inner and outer rings and roller / cage assembly are perfectly split, with the bearing ring halves held together with fastening screws |
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Includes split fastening rings with a contact-type sealing surface |
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Fastening ring is also used as a seal sliding surface |
Designation System
Bearing Dimensions and Operating Values
| 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.
