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Bearings for BOFs and Converters

Bearings for BOFs and Converters

Split bearings are directly mounted and comprised of two double inner races, two single and one double outer race, with an inner race spacer and two outer race spacers.
Slots in the inner race spacer permit lubricant to flow from the bearing chamber to the roll neck. The inner race spacers are hardened to minimize face wear.

Size range:
ID 50.800 mm to 1500.000 mm (2.0000 in. to 59.0551 in.)
OD 83.337 mm to 2032.000 mm (3.2810 in. to 80.0000 in.)
Design Attributes:
Two double cones, two single cups and a double cup with a cone spacer and two cup spacers.
Spacers have slots or holes for lubrication.
Cone spacers are hardened to reduce face wear. Numbered serially to assure correct installation sequence. Applications: Low- and medium-speed rolling mills

Bearings for BOFs and Converters

Ultra-Large Split Bearings for BOFs and Converter Trunnions


Benefits :

❶  Bearings can be replaced without removing the bull gear, thus reducing maintenance costs

❷  Reduction of maintenance costs by shortening length of time for bearing replacement work

❸  Reduction of production loss, which would affect subsequent processes


Techspecs:

Ultra-Large Split Bearings for BOFs and Converter Trunnions

Bearing Numbers

Boundary Dimensions (mm) Basic Load Ratings (kN)

Fig.

d D B b b 1 d 1 D u r 1 (min) r 2 (min) C r C 0r

750SLPT1051 750 1 000 250 355 — 905 914.4 6 7.5 6 800 18 300 1

SL850-7 850 1 120 272 385 — 1 015 1 025 6 6 8 000 21 600 1

900SLPT1251 900 1 250 285 410 — 1 100 1 142 7.5 19 9 850 24 200 1

950SLPT1451 950 1 400 300 520 600 1 182 1 265 7.5 28 12 300 27 900 2

SL1120-3 1 120 1 580 320 632.5 697.5 1 400 1 445 9.5 30 13 200 32 000 2

* 1200SLPT1751 1 200 1 700 410 780 780 1 470 1 536 9.5 31 17 300 43 500 2 *

1200SLPT1752 1 200 1 700 410 660 730 1 470 1 536 9.5 19 17 300 43 500 2

1320SLPT1851 1 320 1 850 530 815 814 1 600 1 670 12 31 22 500 63 500 2

* 1400SLPT1951 1 400 1 900 530 880 880 1 680 1 710 12 31 22 800 65 000 2 *

* 1400SLPT1953 1 400 1 900 530 810 860 1 680 1 710 12 31 22 800 65 000 2 *

b

B

r 1

r 1

r 2

r 2

b 1

jd 1 jD u j d j D

Fig. 1 Fig. 2 Clamp Ring with Tangential Seal Surface

Remarks 1. The shapes of bearings marked * are not exactly the same as shown in Fig. 2.

2. Other bearings are available. Please contact NSK for additional information.

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