Page 132 - needle bearings

Machined-ring needle roller bearings
NTN

With inner ring

C C
Type NA49 r r
Type NA59 r r
Type NA69
Type NKʴʴIR
ПD Пd ПF ПD Пd ПF

Type NA49ʝR Type NA69ʝR
Type NA59
Type NKʝRʴIR

d 32ʙ55mm

Boundary dimensions Basic load ratings Limiting speeds Bearing numbers
dynamic static dynamic static
mm N kgf r/min
grease oil
d D C rs min 1) F s 2) Cr Cor Cr Cor
52 27 0.6 40 0.8 38 000 61 000 3 850 6 250 6 500 10 000 NA59/32
32
52 36 0.6 40 0.5 47 500 82 000 4 850 4 350 6 500 10 000 NA69/32R
50 20 0.3 40 0.5 26 400 47 000 2 700 4 800 6 500 10 000 NK40/20RʴIR35ʷ40ʷ20
50 30 0.3 40 1 38 500 76 000 3 900 7 750 6 500 10 000 NK40/30RʴIR35ʷ40ʷ30
35 55 20 0.6 42 0.8 32 000 50 000 3 300 5 100 6 500 9 500 NA4907R
55 27 0.6 42 0.8 39 000 64 500 3 950 6 550 6 500 9 500 NA5907
55 36 0.6 42 0.5 49 000 86 500 5 000 8 800 6 500 9 500 NA6907R

53 20 0.3 43 0.5 27 500 51 000 2 810 5 200 6 500 9 500 NK43/20RʴIR38ʷ43ʷ20
38
53 30 0.3 43 1 40 000 82 000 4 100 8 400 6 500 9 500 NK43/30RʴIR38ʷ43ʷ30
55 20 0.3 45 0.5 28 000 52 500 2 860 5 400 6 000 9 000 NK45/20RʴIR40ʷ45ʷ20
55 30 0.3 45 1 41 000 85 500 4 150 8 700 6 000 9 000 NK45/30RʴIR40ʷ45ʷ30
40 62 22 0.6 48 1 43 500 66 500 4 450 6 800 5 500 8 500 NA4908R
62 30 0.6 48 1 53 000 92 500 5 450 9 450 5 500 8 500 NA5908
62 40 0.6 48 0.5 67 000 116 000 6 850 11 800 5 500 8 500 NA6908R
57 20 0.3 47 0.5 28 800 55 500 2 940 5 650 5 500 8 500 NK47/20RʴIR42ʷ47ʷ20
42
57 30 0.3 47 1 42 500 91 500 4 350 9 350 5 500 8 500 NK47/30RʴIR42ʷ47ʷ30
62 25 0.6 50 1.5 38 500 74 500 3 950 7 550 5 500 8 000 NK50/25RʴIR45ʷ50ʷ25
62 35 0.6 50 2 51 000 106 000 5 200 10 800 5 500 8 000 NK50/35RʴIR45ʷ50ʷ35
45 68 22 0.6 52 1 46 000 73 000 4 700 7 450 5 000 7 500 NA4909R
68 30 0.6 52 1 56 000 101 000 5 700 10 300 5 000 7 500 NA5909
68 40 0.6 52 0.5 70 500 127 000 7 200 13 000 5 000 7 500 NA6909R
68 25 0.6 55 1.5 41 000 82 000 4 150 8 400 5 000 7 500 NK55/25RʴIR50ʷ55ʷ25
68 35 0.6 55 2 54 000 118 000 5 500 12 000 5 000 7 500 NK55/35RʴIR50ʷ55ʷ35
50 72 22 0.6 58 1 48 000 80 000 4 900 8 150 4 700 7 000 NA4910R
72 30 0.6 58 1 58 000 110 000 5 950 11 200 4 700 7 000 NA5910
72 40 0.6 58 0.5 74 000 139 000 7 500 14 200 4 700 7 000 NA6910R
72 25 0.6 60 1.5 41 000 85 000 4 200 8 700 4 300 6 500 NK60/25RʴIR55ʷ60ʷ25
55 72 35 0.6 60 2 57 000 130 000 5 800 13 200 4 300 6 500 NK60/35RʴIR55ʷ60ʷ35
80 25 1 63 1.5 58 500 99 500 6 000 10 100 4 300 6 500 NA4911R

Note 1) Allowable minimum chamfer dimension r . 2) Allowable axial stroking value of inner ring against outer ring.
Remarks: Nominal code number of inner ring (IR) comprises the codes of IR bore diameterʷouter diameterʷwidth.
B-70