Page 33 - needle bearings

Bearing Accuracy
NTN

Table 4.5 Allowable critical value for chamfering dimension
Table 4.5 (1) Radial bearings
6OJU mm
Nominal bore diameter
1 d Radial direction Axial direction
rs min
over incl. rs max Inner ring side face
(or outer ring side face)
0.15 ʔ ʔ 0.3 0.6
0.2 ʔ ʔ 0.5 0.8
rsmin
ʔ 40 0.6 1 rs max Radial direction
0.3 rsmin
40 ʔ 0.8 1
Bearing bore surface
ʔ 40 1 2 (or outer surface) rsmin
0.6
40 ʔ 1.3 2 rsmax
Axial direction
ʔ 50 1.5 3
1
50 ʔ 1.9 3
ʔ 120 2 3.5
1.1
120 ʔ 2.5 4
ʔ 120 2.3 4
1.5
120 ʔ 3 5 Table 4.5 (2) Thrust bearings
ʔ 80 3 4.5 6OJU mm
2 80 220 3.5 5 rs min 1 Radial and axial directions
rs max
220 ʔ 3.8 6
0.3 0.8
ʔ 280 4 6.5
2.1 0.6 1.5
280 ʔ 4.5 7
ʔ 100 3.8 6 1 2.2
2.5 100 280 4.5 6 1.1 2.7
280 ʔ 5 7 1.5 3.5
ʔ 280 5 8 2 4
3
280 ʔ 5.5 8 2.1 4.5
ʔ ʔ 6.5 9 3 5.5
1 Allowable minimum values for the chamfering dimension "r" . 1 Allowable minimum values for the chamfering dimension "r" .

Table 4.6 Basic tolerances 6OJU Жm
Basic dimension IT basic tolerance classes
(mm)
over incl. IT1 IT2 IT3 IT4 IT5 IT6 IT7 IT8 IT9 IT10
3 0.8 1.2 2 3 4 6 10 14 25 40
3 6 1 1.5 2.5 4 5 8 12 18 30 48
6 10 1 1.5 2.5 4 6 9 15 22 36 58
10 18 1.2 2 3 5 8 11 18 27 43 70
18 30 1.5 2.5 4 6 9 13 21 33 52 84
30 50 1.5 2.5 4 7 11 16 25 39 62 100
50 80 2 3 5 8 13 19 30 46 74 120
80 120 2.5 4 6 10 15 22 35 54 87 140
120 180 3.5 5 8 12 18 25 40 63 100 160
180 250 4.5 7 10 14 20 29 46 72 115 185
250 315 6 8 12 16 23 32 52 81 130 210
315 400 7 9 13 18 25 36 57 89 140 230
400 500 8 10 15 20 27 40 63 97 155 250
500 630 9 11 16 22 30 44 70 110 175 280
630 800 10 13 18 25 35 50 80 125 200 320
800 1 000 11 15 21 29 40 56 90 140 230 360
1 000 1 250 13 18 24 34 46 66 105 165 260 420
1 250 1 600 15 21 29 40 54 78 125 195 310 500
1 600 2 000 18 25 35 48 65 92 150 230 370 600
2 000 2 500 22 30 41 57 77 110 175 280 440 700
2 500 3 150 26 36 50 69 93 135 210 330 540 860

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