Page 123 - needle bearings

Machined-ring needle roller bearings
NTN

ra ra

ПDa ПDa

FW 42ʙ63mm

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.)
52 20 0.3 26 900 49 000 2 750 5 000 6 500 9 500 NK42/20R 50 0.3 0.086
52 30 0.3 39 000 79 000 4 000 8 050 6 500 9 500 NK42/30R 50 0.3 0.130
42 +0.041 55 20 0.6 32 000 50 000 3 300 5 100 6 500 9 500 RNA4907R 51 0.6 0.107
+0.025
55 27 0.6 39 000 64 500 3 950 6 550 6 500 9 500 RNA5907 51 0.6 0.176
55 36 0.6 49 000 86 500 5 000 8 800 6 500 9 500 RNA6907R 51 0.6 0.193

53 20 0.3 27 500 51 000 2 810 5 200 6 500 9 500 NK43/20R 51 0.3 0.086
+0.041
43 +0.025
53 30 0.3 40 000 82 000 4 100 8 400 6 500 9 500 NK43/30R 51 0.3 0.133
55 20 0.3 28 000 52 500 2 860 5 400 6 000 9 000 NK45/20R 53 0.3 0.092
+0.041
45 +0.025
55 30 0.3 41 000 85 500 4 150 8 700 6 000 9 000 NK45/30R 53 0.3 0.139
57 20 0.3 28 800 55 500 2 940 5 650 5 500 8 500 NK47/20R 55 0.3 0.095
+0.041
47 +0.025
57 30 0.3 42 500 91 500 4 350 9 350 5 500 8 500 NK47/30R 55 0.3 0.142
62 22 0.6 43 500 66 500 4 450 6 800 5 500 8 500 RNA4908R 58 0.6 0.140
+0.041
48 +0.025 62 30 0.6 53 000 92 500 5 450 9 450 5 500 8 500 RNA5908 58 0.6 0.225
62 40 0.6 67 000 116 000 6 850 11 800 5 500 8 500 RNA6908R 58 0.6 0.256

+0.041 62 25 0.6 38 500 74 500 3 950 7 550 5 500 8 000 NK50/25R 58 0.6 0.158
50 +0.025
62 35 0.6 51 000 106 000 5 200 10 800 5 500 8 000 NK50/35R 58 0.6 0.221
68 22 0.6 46 000 73 000 4 700 7 450 5 000 7 500 RNA4909R 64 0.6 0.182
+0.049
52 +0.030 68 30 0.6 56 000 101 000 5 700 10 300 5 000 7 500 RNA5909 64 0.6 0.232
68 40 0.6 70 500 127 000 7 200 13 000 5 000 7 500 RNA6909R 64 0.6 0.273
68 25 0.6 41 000 82 000 4 150 8 400 5 000 7 500 NK55/25R 64 0.6 0.193
+0.049
55 +0.030
68 35 0.6 54 000 118 000 5 500 12 000 5 000 7 500 NK55/35R 64 0.6 0.267
72 22 0.6 48 000 80 000 4 900 8 150 4 700 7 000 RNA4910R 68 0.6 0.163
+0.049
58 +0.030 72 30 0.6 58 000 110 000 5 950 11 200 4 700 7 000 RNA5910 68 0.6 0.289
72 40 0.6 74 000 139 000 7 500 14 200 4 700 7 000 RNA6910R 68 0.6 0.320
72 25 0.6 41 000 85 000 4 200 8 700 4 300 6 500 NK60/25R 68 0.6 0.185
+0.049
60 +0.030
72 35 0.6 57 000 130 000 5 800 13 200 4 300 6 500 NK60/35R 68 0.6 0.258
+0.049 80 25 1 58 500 99 500 6 000 10 100 4 300 6 500 RNA4911R 75 1 0.255
63 +0.030
80 34 1 76 500 140 000 7 800 14 300 4 300 6 500 RNA5911 75 1 0.367

Note 1) Allowable minimum chamfer dimension r.

B-61