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Back-up rollers without pivot

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.

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.

Technical Characteristics

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.

Execution with fey

Execution with tightness

C.R. Ref.

900-1907

900-2742

900-2744

900-1857

900-2323

200-1741

900-2741

200-1197

200-0059

900-2030

200-1198

900-2012

900-2011

200-0695

200-0696

200-0697

900-1966

900-2008

900-2270/1

900-2312

900-1967

Max speed

RPM min-1

2000

1500

1500

1300

1300

1400

1200

1100

900

1000

900

900

700

600

600

600

500

500

500

400

400

D

mm

48

52

60

65

72

74

80

80

90

95

105

120

130

140

150

160

180

200

220

250

280

A

mm

36

44

50

45

42

50

54

48

35

55

60

70

70

60

63

71

102

92

120

124

124

B

mm

27

42

48

41

40

47

50

44

32

51

56

66

66

56

61

67

98

88

117

121

121

C

KN

38

48

71

80

70

99

92

100

74

124

189

231

260

227

287

286

493

525

655

878

892

Co

KN

56

80

108

111

100

139

134

161

102

192

314

390

365

375

475

452

1107

890

1182

1687

1665

Cw

KN

32

40

60

68

59

84

78

87

63

107

162

195

221

193

245

243

420

446

556

745

758

Cow

KN

47

61

91

95

94

118

114

137

87

163

268

330

310

320

402

385

940

756

1005

1433

1415

d

mm

20

25

25

25

30

25

35

35

40

40

50

50

50

55

70

65

90

90

90

120

120

Bearing:

Roller:

C: Dynamic load

Co: Static load

Co: Dynamic axial load

Cow: Static axial load

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

C.R. s.r.l. - 26845 Codogno (LODI) - ITALY - Via S. Pertini, 6/8 (Z.I.) - tel. +39 0377 437021 - fax +39 0377 437107 - p.iva 01183740198 |  info@crsrl.com