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RA Cross roller bearings

【Time:2012-07-13】【Sources:The station】【Author:Administrator】【Click:2329】

RA Cross roller bearings

With the Cross-Roller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90V groove, separated from each other by a spacer retainer.  This design allows just one bearing to receive loads in all directions including, radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.
Bearing features:
1.     High precision: precision at P4, P2.
2.     High rigidity: this series bearings are with preload.
3.     High load capacity: this series bearings can support axial load, radial load, and tilting load.
4.     Small volume: this series bearings can save space for the machine.
Application scope:
Crossed cylindrical roller bearings are widely applied in the precision rotary table, rotary joint of manipulator, medical equipment, and measuring instrument etc.

    RA型(外圈分体、内圈整体)此型号是将RB型内外圈厚度减小到极限的紧凑型,结构是和RB型一样的外圈分体结构,最适合于需要重量轻、紧凑设计的部位,例如机器人和机械手旋转部位。
适用范围:被广泛应用于精密旋转工作台、机械手旋转关节、医疗器械、计量器械等等。

Identification
number

Main dimensions

Shoulder height

Basic load rating

weight

(radial)

inner ring

outer ring

Roller pitch circle diameter

width

r

Cr

Cor

d

D

dp

B

rmin

ds

Dh

kN

kN

kg

RA  5008

50

66

57

8

0.5

53.5

60.5

5.1

7.19

0.08

RA  6008

60

76

67

8

0.5

63.5

70.5

5.68

8.68

0.09

RA  7008

70

86

77

8

0.5

73.5

80.5

5.98

9.8

0.1

RA  8008

80

96

87

8

0.5

83.5

90.5

6.37

11.3

0.11

RA  9008

90

106

97

8

0.5

93.5

100.5

6.76

12.4

0.12

RA  10008

100

116

107

8

0.5

103.5

110.5

7.15

13.9

0.14

RA  11008

110

126

117

8

0.5

113.5

120.5

7.45

15

0.15

RA  12008

120

136

127

8

0.5

123.5

130.5

7.84

16.5

0.17

RA  13008

130

146

137

8

0.5

133.5

140.5

7.94

17.6

0.18

RA  14008

140

156

147

8

0.5

143.5

150.5

8.33

19.1

0.19

RA  15008

150

166

157

8

0.5

153.5

160.5

8.82

20.6

0.2

RA  16013

160

186

172

13

0.8

165

179

23.3

44.9

0.59

RA  17013

170

196

182

13

0.8

175

189

23.5

46.5

0.64

RA  18013

180

206

192

13

0.8

185

199

24.5

49.8

0.68

RA  19013

190

216

202

13

0.8

195

209

24.9

51.5

0.69

RA  20013

200

226

212

13

0.8

205

219

25.8

54.7

0.71

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