Pressure rolls


Steel Industry - Pressure rolls

Technical Drawing and Exploded View - Pressure rolls

1. Viton o-ring
2. Inner ring
3. Cylindrical rollers
4. Outer ring
5. Cylindrical rollers
6. Inner ring
7. Viton o-ring


Technical Data - Pressure rolls

C.R. rif / ref d (mm) d1 (mm) D (mm) D1 (mm) B (mm) r1,2 min. (mm) r3,4 min. (mm) Esec tipo / type C (KW) Co (KW) Cw (KW) Cow (KW)
900-2340 93 126 170 127 95 2 10x15° 1 TB2 429 655 286 390
900-3852 100 148 200 149 114 4 10X15° 1 TB2 605 1000 413 600
900-3853 105 151 215 153 87 3 3 2 TB1 501 695 358 450
900-2339 110 157 210 158 110 2 10X15° 1 TB2 402 610 255 325
900-2818 120 157 210 158 114 4 10X15° 1 TB2 550 915 330 455
900-3854 128,665 160 210 162 114 4 10X15° 1 TB2 583 1120 352 560
900-3855 140 178 250 180 110 3 11.5X17° 1 825 1400 561 850
900-3446 140 187 250 188 114 3 13.5X17° 1 825 1400 512 750
900-3856 140 187 280 188 114 3 13.5X15° 1 TB1 913 1460 671 1000
900-3857 160 195 250 197 140 3 13.5X17° 3 TB1 2120 4400 1100 1830
900-3858 160 231 320 233 120 4 13X17° 1 1140 2040 737 1140
900-3859 160 227 330 228 140 4 6.5X15° 1 1140 2040 825 1340
900-3860 180 238 330 240 125 4 6.5X15° 1 968 1930 644 1100


Bearing:
C: Dynamic load  - Co: Static load 

Roller 
Cw: Dynamic load - Cow: Static load 


Notes:
TB1= bainitic temper of inner and outer ring
TB2= bainitic temper of outer ring

Technical Characteristics - Pressure rolls

C.R. pressure rolls are mainly used in the continuous furnaces of sintering plants. They are massive bearings ready to be fixed.
They are used with heavy loads and where the rotation reverses continuously at low speed.
The outer ring shows three entire borders, one section and one outer surface which is highly resistant to wear.
The inner ring is made of two parts, each one has an entire border expressly developed in order to bear high axial thrusts, in addition to radial loads.
Pressure rolls do not need maintenance.

C.R. pressure rolls have the following technical characteristics:
  • The outer ring and the inner ring are manufactured in core-hardened UNI 100CrMo7 steel.
  • This type of steel guarantees an excellent distribution of core-hardening.
  • The degree of hardness is 60-2 HRC.
  • In order to increase the resistance to wear – due to high load and contamination of outer agents – pressure rolls usually undergo bainitic temper treatment with the following suffixes: TB1 means bainitic temper of both rings, TB2 means bainitic temper only of the outer ring.
  • Pressure rolls usually work at high temperatures, therefore they undergo stabilization treatment up to 250° C, named S2.
  • The sealing system foresees the presence of Viton O-rings, which are inserted in the proper grooves on the inner ring. The seals allow the bearing to be disassembled, they prevent the entrance of contaminating agents and in the meantime, the leakage of lubricant.