Page 121 - needle bearings

Machined-ring needle roller bearings
NTN

ra ra

ПDa ПDa

FW 17ʙ28mm

Boundary dimensions Basic load ratings Limiting speeds Bearing Abutment Mass
dynamic static dynamic static numbers dimensions
mm N kgf r/min mm kg
grease oil Da ras
Fw D C rs min 1) Cr Cor Cr Cor max max (approx.)
25 16 0.3 12 100 15 000 1 240 1 530 15 000 22 000 NK17/16R 23 0.3 0.024
+0.027
17 +0.016
25 20 0.3 15 400 20 400 1 570 2 080 15 000 22 000 NK17/20R 23 0.3 0.030
26 16 0.3 12 700 16 200 1 300 1 650 14 000 21 000 NK18/16R 24 0.3 0.025
+0.027
18 +0.016
26 20 0.3 16 100 22 000 1 640 2 250 14 000 21 000 NK18/20R 24 0.3 0.031
27 16 0.3 13 300 17 400 1 350 1 780 14 000 21 000 NK19/16R 25 0.3 0.026
+0.033
19 +0.020
27 20 0.3 16 000 22 200 1 630 2 260 14 000 21 000 NK19/20R 25 0.3 0.032
28 13 0.3 10 300 12 800 1 050 1 310 13 000 20 000 RNA4902R 26 0.3 0.022
28 16 0.3 13 200 17 500 1 340 1 790 13 000 20 000 NK20/16R 26 0.3 0.027
+0.033
20 +0.020 28 18 0.3 14 100 19 100 1 440 1 950 13 000 20 000 RNA5902 26 0.3 0.033
28 20 0.3 16 700 23 800 1 700 2 420 13 000 20 000 NK20/20R 26 0.3 0.034
28 23 0.3 17 600 25 300 1 790 2 580 13 000 20 000 RNA6902R 26 0.3 0.040

29 16 0.3 13 700 18 700 1 400 1 910 13 000 19 000 NK21/16R 27 0.3 0.028
+0.033
21 +0.020
29 20 0.3 18 300 27 100 1 860 2 760 13 000 19 000 NK21/20R 27 0.3 0.035
30 16 0.3 14 200 19 900 1 450 2 030 12 000 18 000 NK22/16R 28 0.3 0.034
30 20 0.3 18 000 27 000 1 840 2 760 12 000 18 000 NK22/20R 28 0.3 0.037
+0.033
22 +0.020 30 13 0.3 11 200 14 600 1 140 1 490 12 000 18 000 RNA4903R 28 0.3 0.022
30 18 0.3 15 200 21 700 1 550 2 210 12 000 18 000 RNA5903 28 0.3 0.035
30 23 0.3 18 200 27 200 1 850 2 770 12 000 18 000 RNA6903R 28 0.3 0.042
+0.033 32 16 0.3 15 200 22 300 1 550 2 280 11 000 170 00 NK24/16R 30 0.3 0.032
24 +0.020
32 20 0.3 18 600 28 800 1 890 2 930 11 000 17 000 NK24/20R 30 0.3 0.040
33 16 0.3 15 100 22 400 1 540 2 280 11 000 16 000 NK25/16R 31 0.3 0.033
33 20 0.3 19 200 30 500 1 960 3 100 11 000 16 000 NK25/20R 31 0.3 0.042
25 +0.033 37 17 0.3 21 300 25 500 2 170 2 600 11 000 16 000 RNA4904R 35 0.3 0.052
+0.020
37 23 0.3 28 400 37 000 2 900 3 750 11 000 16 000 RNA5904 35 0.3 0.084
37 30 0.3 36 500 50 500 3 700 5 150 11 000 16 000 RNA6904R 35 0.3 0.100
34 16 0.3 15 600 23 600 1 590 2 410 10 000 15 000 NK26/16R 32 0.3 0.034
+0.033
26 +0.020
34 20 0.3 19 100 30 500 1 940 3 100 10 000 15 000 NK26/20R 32 0.3 0.042
37 20 0.3 22 300 34 000 2 280 3 450 9 500 14 000 NK28/20R 35 0.3 0.052
+0.033
28 +0.020
37 30 0.3 26 700 48 000 2 720 4 900 9 500 14 000 NK28/30R 35 0.3 0.082
Note 1) Allowable minimum chamfer dimension r.

B-59