Machined Ring Needle Roller Bearings NA4900
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Machined Ring Needle Roller Bearings NA4900

Availability:
  • NA4900
  • XSP or OEM

Machined ring needle roller bearings NA4900


XSP solid ring needle roller bearings have a compact structure, small radial size, and large load capacity. They are suitable for components with limited radial outline size. Needle roller bearings generally can only bear radial load, not axial load. The limit speed of the needle roller bearing is low. When the main engine speed is high, the needle roller bearing with a cage should be selected as much as possible. The assembled G2 needle rollers have a diameter variation of less than 2µm. Except for the full-filled needle roller bearings, high rigidity cages are used to accurately guide the needle roller parallel axis.


Needle roller bearings without inner ring RNA, NK type

Needle roller bearings without inner ring are suitable for components with limited radial dimensions. Since there is no inner ring, the surface of the journal that cooperates with them directly rolls. It is required that the surface hardness is not lower than HRC60, and the surface roughness Ra value is not greater than 0.63µm. This type of bearing does not limit the axial displacement of the shaft or the casing, and the limit speed is higher.


Needle roller bearings with inner ring NA, NKI type

Since this type of bearing has no ribs, the inner ring, outer ring, full set of needle rollers and cages can be installed separately, without limiting the axial displacement of the shaft or housing. Because the needle rollers are separated by a cage, friction is reduced, so it can be used in parts with higher speeds.


轴承型号

Bearing Designation

外形尺寸(mm)

Boundary Dimensions

(mm)

基本额定负荷

Rasic Load Rating

(N)

极限转速

Limiting Speed

(Rpm)

重量

Mass

现行型号

Current Designation

原型号

Original Designation

d

D

B

动 Cr 

Dyamic

静 Cor 

Static

脂润滑

Greas

近似

Approx

NA4900

4544900

10

22

13

8006

9000

23700

24.3

NA4901

4544901

12

24

13

5047

6352

20000

27.6

NA4902

4544902

15

28

13

6447

9053

18800

35.9

NA4903

4544903

17

30

13

7010

10010

17000

40.9

NA4904

4544904

20

37

17

11912

16594

16200

80.1

NA4905

4544905

25

42

17

13452

20475

13832

94.3

NA4906

4544906

30

47

17

25000

35500

13000

103.2

NA4907

4544907

35

55

20

19800

41500

11134

171

NA4908

4544908

40

62

22

31036

63873

8567

242

NA4909

4544909

45

68

22

37000

96500

8052

273.3

NA4910

4544910

50

72

22

41000

72000

7526

280.4

NA4911

4544911

55

80

25

50600

96580

7156

395

NA4912

4544912

60

85

25

52800

110500

6022

428.5

NA4913

4544913

65

90

25

57500

110500

6022

466.6

NA4914

4544914

70

100

30

79000

154000

5111

731

NA4915

4544915

75

105

30

82000

158000

5111

804.8

NA4916

4544916

80

110

30

81000

170500

5111

851.5

NA4917

4544917

85

120

35

111000

237000

4600

1276

NA4918

4544918

90

125

35

114000

250000

4400

1341.2

NA4919

4544919

95

130

35

116000

260000

4200

1406.4

NA4920

4544920

100

140

40

120000

274000

4000

1956

NA4922

4544922

110

150

40

132000

290000

3700

2121.7

NA4924

4544924

120

165

45

181000

390000

3400

2910.4

NA4926

4544926

130

180

50

223000

470000

3100

3963.4

NA4928

4544928

140

190

50

209000

500000

2900

4216.8

NA4930

4544930

150

210

60

319000

649300

2600

6514.8

NA4932

4544932

160

220

60

345400

752500

2300

6912.8


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