Back-up rollers without pivot


Steel Industry - Back-up rollers without pivot

Technical Drawing and Exploded View - Back-up rollers without pivot

Execution with tightness
Execution with fey


1. Seal  sheet
2. Fey seal ring
3. Support thrust ring
4. Cylindrical rollers
5. Inner ring
6. Outer ring
7. Support thrust ring
8. Fey seal ring
9. Seal sheet


Technical Data - Back-up rollers without pivot

C.R. rif / ref Ø est. (mm) Sigla D (mm) d (mm) L (mm) B (mm) E (mm) h (mm) Tenute / Seal PDA File rulli / Rollers Rows Gabbie / cages Cw (KW) Cow (KW)
300-0001 24,5 CRAT 24.5X12X75 24,5 12 75 41 43 - - 2 • 10 16,8
300-0002 33 CRAT 33X19X90 33 19 90 57 58 - - 2 • 18 33
300-0003 47 CRAT 47X20X155 47 20 155 125 126 - - 4 • 57,2 65,9
300-0004 47 CRAT 47X22X145 47 22 145 115 - 21 - 2 • 46,4 49,2
300-0005 50 CRAT 50X20X165 50 20 166 128 130 - • 4 • 69,1 83,2
300-0006 52 CRAT 52X20X55 52 20 55 24 27,4 - - 2 - 33 43
300-0007 52 CRAT 52X20X125 52 20 125 94 95 - - 4 • 65,1 77,7
300-0008 55 CRAT 55X25X159.5 55 25 159,5 125 - 21 - 4 • 100,4 131,8
300-0009 60 CRAT 60X25X90 60 25 90 50 52 - • 2 • 36,2 43
300-0010 60 CRAT 60X25X160 60 25 160 130 132 - • 2 • 71,3 84,3
300-0011 60 CRAT 60X25X170 60 25 170 130 132 - • 2 • 71,3 84,3
300-0012 60 CRAT 60X30X151.25 60 30 151,25 109,25 111,3 27 • 2 • 70,2 82
300-0013 60 CRAT 60X30X189 60 30 189 160,3 - 25 - 2 • 72,4 85,3
300-0014 60 CRAT 60X30X201 60 30 201 160,3 - - • 2 • 72,4 85,3
300-0015 60 CRAT 60X30X202 60 30 202 160,3 162 27 • 2 • 72,4 85,3
300-0016 65 CRAT 65X25X198 65 25 198 156 168 21,5 - 4 • 124,2 170,6
300-0017 75 CRAT 75X40X165 75 40 165 140 143 29,5 - 4 - 149 208,5
300-0018 76 CRAT 76X40X165 76 40 165 140 143 30 - 4 - 152,3 213,8
300-0019 80 CRAT 80X35X201 80 35 201 160,3 - - • 2 • 111,2 115,6
300-0020 80 CRAT 80X35X210 80 35 210 170 - - • 2 • 111,2 115,6
300-0021 80 CRAT 80X35X230 80 35 230 200 - 30,5 - 2 • 114,5 118,8
300-0022 80 CRAT 80X35X302.5 80 35 302,5 261,8 - - • 2 • 111,2 115,6
300-0023 80 CRAT 80X40X180 80 40 180 140 143 - • 4 • 127,5 171,7
300-0024 80 CRAT 80X40X210 80 40 210 150 156 - - 4 • 136 188
300-0025 90 CRAT 90X45X134.3 90 45 134,3 100 102 - • 2 - 139,3 167,4
300-0026 90 CRAT 90X45X140 90 45 140 100 102 - • 2 - 157,7 195,5
300-0027 95 CRAT 95X45X288 95 45 288 236 240 - • 2 • 173,9 229
300-0028 95 CRAT 95X45X362 95 45 362 310 314 - • 2 • 179,3 238,7
300-0029 100 CRAT 100X45X245 100 45 245 200 201,4 - • 2 • 175 231,1
300-0030 100 CRAT 100X45X246 100 45 246 200 201,4 - • 2 • 175 231,1
300-0031 100 CRAT 100X45X246 100 45 246 200 201,4 - • 4 • 280,8 415,8
300-0032 134 CRAT 134X55X146 134 55 146 83 85 50 • 2 - 227,9 315

Bearing: 
C: Dynamic load  -  Co: Static load


Roller:
Co: Dynamic axial load  -  Cow: Static axial load


Technical Characteristics - Back-up rollers without pivot

The series of back-up rollers without pivot is manufactured with two or more full-complement-cylindrical-roller rows; they are separated by spacers obtained entirely on the outer ring.
These bearings are particularly used on machines that work continuously and in extremely tough conditions, because of their high dynamic and static load capacity.
The spacers between the rolling raceways guarantee the bearing of the axial thrusts.

Back-up rollers without pivot have the following technical characteristics:

  • The inner rings and the outer rings are manufactured in UNI 100Cr6 core hardened steel, with hardness 60±2 HRC. The outer ring has a cambered radius on the outer diameter; this allows to improve the distribution of the loads during functioning.
  • Back-up rollers with surface hardness of the outer ring reduced to 53÷58 HRC can be supplied on request.
  • Inner ring with holes and grooves for the inflow of the lubricant.
  • Full-complement of cylindrical rollers to ensure the highest possible load capacity.
  • Double system of protection and tightness, through shields and sealing spring rings made of steel. The sealing system can be also with lip shearing rubber seals.
  • The tolerances during execution are according normal class P0; special execution according class P5 (DIN 620) can be manufactured on request .
  • On request, they can be manufactured in stainless steel.