Hall No.
A1093
RB (ERBC) Standard Cross Roller Bearing
  • RB (ERBC) Standard Cross Roller Bearing
  • RB (ERBC) Standard Cross Roller Bearing
  • RB (ERBC) Standard Cross Roller Bearing
  • RB (ERBC) Standard Cross Roller Bearing
  • RB (ERBC) Standard Cross Roller Bearing

RB (ERBC) Standard Cross Roller Bearing

Quality: all products are 100% inspected
Precision level: P5,P4 and P2
Application: robot rotating parts, manipulator joint parts, CNC indexing workbenches, medical equipment, and measuring instruments
Package: plywood case with test reports and qualified certificates
Service: 24/7 online service, OEM & ODM services available

Product Detail

RB (ERBC) series cross roller bearing is the basic model of crossed roller bearing. It has a separable outer ring and a united inner ring. So it is widely used for inner ring accuracy rotation. Model RB is the basic type of crossed roller bearings. The outer ring is divided into two pieces, and the inner ring is an integral structure, which is most suitable for occasions that require the rotation accuracy of the inner ring.


The outer ring of this type of bearing is divided into two parts in the axial direction and the inner ring as a whole; the cylindrical rollers are arranged in two 90°V-shaped raceways at a 90° included angle of 1:1, and the cylindrical rollers are separated by spacers.  In the future, this kind of bearing has a compact structure, so that a set of bearings can bear radial loadaxial load and overturning load at the same time, while ensuring structural rigidity, greatly simplifying the design of the shafting structure; Can be pre-loaded to further facilitate installation and maintenance work. 


At the same time, this type of bearing has the characteristics of High precisionHigh load and High rigidity, which is very suitable for robot rotating parts, manipulator joint parts, CNC indexing workbenches, medical equipment, and measuring instruments It is especially suitable for the parts that require the rotation accuracy of the inner ring.



RB CROSS ROLLER BEARING


1. Runout accuracy of crossed roller bearings

Bearing runout can be divided into synchronous runout and asynchronous runout. The impact of synchronous runout on the overall runout of the worktable can be reduced to the greatest extent by grinding the work surface, but the impact of asynchronous runout cannot be eliminated in this link. , It is mainly determined by the outer diameter tolerance and roundness of the roller. Therefore, the better the control of the bearing asynchronous runout, the smaller the final radial and axial runout of the worktable, that is, the higher the running accuracy. When selecting bearing brands and accuracy grades, it is recommended not to only focus on the bearing assembly runout, but to have a thorough understanding of the accuracy standards that affect the asynchronous run out of the bearing.


2. Cross roller bearing fit

It is recommended that the inner ring and the shaft, and the outer ring and the gear ring are tightly matched when selecting the bearing. Since the outer ring is a rotating part, the tight-fitting amount should be slightly larger; the inner ring will be pressed down by the end cap to adjust the maximum pre-tightening amount, so the tight-fitting amount should be slightly smaller. However, if the inner ring is considered to be a stationary component, and the inner ring and the shaft are designed as a loose fit (there is a radial gap between the inner ring and the shaft), it may be possible to install the inner ring, lock the inner ring or when the bearing is loaded. The circle is skewed, that is, eccentricity occurs. This eccentricity will cause stress concentration on the boundary of the contact area between the roller and the raceway, causing serious scratches, cratering and peeling, and ending the bearing life earlier.


3. Shape and position tolerance

The mounting surface of the shaft and the ring gear is required to have the same flatness, perpendicularity, roundness and cylindricity as the precision bearing. Controlling these shape and position tolerances can not only achieve better assembly accuracy, but also avoid excessive eccentricity of the inner and outer rings of the bearing to cause stress concentration, and extend the service life of the bearing. Regarding the processing standards of the form and position tolerances, it is recommended to consult the bearing supplier and match its bearing accuracy.


Product process and test:


1. Surface: Make sure that the machine is cooled, control the surface bending and parallel difference. Pickling flaw detection for the first product to see whether there is burning damage or crack.

2. Outer ring: Control ellipse, triangle and size. repeated grinding if it is high.

3. Inner ring: Control ellipse, wall thickness and taper. The vertical difference should meet the requirements if it is high.

4. Raceway: Because of the particularity of this product, it needs to grind at a fixed distance and ensure that cooling is in place.


Standard models of RB series crossed roller bearing:



Catalog



Model No.

D

D

B

C

Co

Mass

Equivalent Models

Mm

Mm

Mm

KN

KN

Kg

IKO


RB2008

20

36

8

3.23

3.1

0.04



RB2508

25

41

8

3.63

3.83

0.05



RB3010

30

55

10

7.35

8.36

0.12

CRB3010


RB3510

35

60

10

7.64

9.12

0.13



RB4010

40

65

10

8.33

10.6

0.16

CRB4010


RB4510

45

70

10

8.62

11.3

0.17



RB5013

50

80

13

16.7

20.9

0.27

CRB5013


RB6013

60

90

13

18

24.3

0.3

CRB6013


RB7013

70

100

13

19.4

27.7

0.35

CRB7013


RB8016

80

120

16

30.1

42.1

0.7

CRB8016


RB9016

90

130

16

31.4

45.3

0.75

CRB9016


RB10016

100

140

16

31.7

48.6

0.83



RB10020

100

150

20

33.1

50.9

1.45

CRB10020


RB11012

110

135

12

12.5

24.1

0.4



RB11015

110

145

15

23.7

41.5

0.75



RB11020

110

160

20

34

54

1.56

CRB11020


RB12016

120

150

16

24.2

43.2

0.72



RB12025

120

180

25

66.9

100

2.62

CRB12025


RB13015

130

160

15

25

46.7

0.72



RB13025

130

190

25

69.5

107

2.82

CRB13025


RB14016

140

175

16

25.9

50.1

1



RB14025

140

200

25

74.8

121

2.96

CRB14025


RB15013

150

180

13

27

53.5

0.68



RB15025

150

210

25

76.8

128

3.16

CRB15025


RB15030

150

230

30

100

156

5.3

CRB15030


RB16025

160

220

25

81.7

135

3.14



RB17020

170

220

20

29

62.1

2.21



RB18025

180

240

25

84

143

3.44



RB19025

190

240

25

41.7

82.9

2.99



RB20025

200

260

25

84.2

157

4

CRB20025

NRXT20025

RB20030

200

280

30

114

200

6.7

CRB20030

NRXT20030

RB20035

200

295

35

151

252

9.6

CRB20035


RB22025

220

280

25

92.3

171

4.1



RB24025

240

300

25

68.3

145

4.5



RB25025

250

310

25

69.3

150

5

CRB25025

NRXT25025

RB25030

250

330

30

126

244

8.1

CRB25030

NRXT25030

RB25040

250

355

40

195

348

14.8

CRB25040


RB30025

300

360

25

76.3

178

5.9

CRB30025

NRXT30025

RB30035

300

395

35

183

367

13.4

CRB30035

NRXT30035

RB30040

300

405

40

212

409

17.2

CRB30040

NRXT30040

RB35020

350

400

20

54.1

143

3.9



RB40035

400

480

35

156

370

14.5

CRB40035

NRXT40035

RB40040

400

510

40

241

531

23.5

CRB40040

NRXT40040

RB45025

450

500

25

61.7

182

6.6



RB50025

500

550

25

65.5

201

7.3



RB50040

500

600

40

239

607

26

CRB50040

NRXT50040

RB50050

500

625

50

267

653

41.7

CRB50050

NRXT50050

RB60040

600

700

40

264

721

29

CRB60040

NRXT60040

RB70045

700

815

45

281

836

46

CRB70045


RB80070

800

950

70

468

1330

105

CRB80070


RB90070

900

1050

70

494

1490

120



RB1000110

1000

1250

110

1220

3220

360



RB1250110

1250

1500

110

1350

3970

440




As a professional manufacturer of bearings, we also provide custom service.

Package: plywood case with test reports and qualified certificates.


RB, RA, CRBH, SX, RU, XU, XSU series crossed cylindrical roller bearings, XR, JXR crossed tapered roller bearings, YRT, YRTS, ZKLDF series rotary table bearings, harmonic reducer bearings
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