SEALED NEEDLE ROLLER BEARINGS WITH INNER RING

NA49...RS       NA49...2RS

NA49...RS, NA49...2RS

 

 

Shaft
Diameter

Bearing Designation

Boundary Dimensions

Basic Load Ratings

Limiting
Speed

NA 49..RS

single sealed

NA 49..2RS

double sealed

d

F

D

C

B

rS

动

C

静

Co

Oil

mm

mm

Min

N

rpm

10

NA  4900 RS

NA  4900.2RS

10

14

22

13

14

0.3

6800

6900

13000

12

NA  4901 RS

NA  4901.2RS

12

16

24

13

14

0.3

7600

8300

12000

15

NA  4902 RS

NA  4902.2RS

15

20

28

13

14

0.3

8600

10300

10000

17

NA  4903 RS

NA  4903.2RS

17

22

30

13

14

0.3

8800

11000

9000

20

NA  4904 RS

NA  4904.2RS

20

25

37

17

18

0.3

17300

19900

7500

25

NA  4905 RS

NA  4905.2RS

25

30

42

17

18

0.3

19300

24200

6500

30

NA  4906 RS

NA  4906.2RS

30

35

47

17

18

0.3

21100

28500

5500

35

NA  4907 RS

NA  4907.2RS

35

42

55

20

21

0.6

26500

39500

4800

40

NA  4908 RS

NA  4908.2RS

40

48

62

22

23

0.6

36000

53000

4200

45

NA  4909 RS

NA  4909.2RS

45

52

68

22

23

0.6

38000

59000

3900

50

NA  4910 RS

NA  4910.2RS

50

58

72

22

23

0.6

40000

64000

3500

 
         TN=plastic retainer, permissible operational temperature 120℃, 150℃for temporary use ,180℃ for short time only   1)for grease lub, the permiss
              vible value should be 60% of those in the list
               +with retaining ring, no lubricating holes or grooves, please add ASR1 before the bearing code if oil holes or grooves are needed for your products.

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