Page 32 - needle bearings

Bearing Accuracy
NTN

Table 4.4 Tolerances of thrust roller bearings
Table 4.4 (1) Inner rings and center rings 6OJU Жm

Nominal bore diameter Allowable deviation of mean diameter Allowable variation of Allowable variation of raceway thickness 1
bore diameter

d or d2 ∆dmp or ∆d2mp Si

NN Vdp or Vd2p

Class 0, 6, 5 Class 4 Class 0, 6, 5 Class 4 Class 0 Class 6 Class 5 Class 4
over incl. high low high low lo w max
ʔ 18 0 ʵ8 0 ʵ7 6 5 10 5 3 2
18 30 0 ʵ10 0 ʵ8 8 6 10 5 3 2
30 50 0 ʵ12 0 ʵ10 9 8 10 6 3 2
50 80 0 ʵ15 0 ʵ12 11 9 10 7 4 3
80 120 0 ʵ20 0 ʵ15 15 11 15 8 4 3
120 180 0 ʵ25 0 ʵ18 19 14 15 9 5 4
180 250 0 ʵ30 0 ʵ22 23 17 20 10 5 4
250 315 0 ʵ35 0 ʵ25 26 19 25 13 7 5
315 400 0 ʵ40 0 ʵ30 30 23 30 15 7 5
400 500 0 ʵ45 0 ʵ35 34 26 30 18 9 6
500 630 0 ʵ50 0 ʵ40 38 30 35 21 11 7
1 The complex bearings are applicable to the category of single plane bearing d which corresponds to the same nominal outer diameter of same diameter
series, without being applicable to d2 category.

Table 4.4 (2) Outer rings 6OJU Жm

Nominal outer Allowable deviation of mean outer diameter Allowable variation Allowable variation ofraceway thickness
diameter of outer diameter
∆Dmp Se
ɹD VDp

mm

Class 0,6,5 Class 4 Class 0,6,5 Class 4 Class 0,6,5,4
over incl. high low high low max max
10 18 0 ʵ11 0 ʵ7 8 5
18 30 0 ʵ13 0 ʵ8 10 6
30 50 0 ʵ16 0 ʵ9 12 7
50 80 0 ʵ19 0 ʵ11 14 8
80 120 0 ʵ22 0 ʵ13 17 10
120 180 0 ʵ25 0 ʵ15 19 11 Depending on the applicable allowable value
of S1 for d or d2 of same bearing.
180 250 0 ʵ30 0 ʵ20 23 15
250 315 0 ʵ35 0 ʵ25 26 19
315 400 0 ʵ40 0 ʵ28 30 21
400 500 0 ʵ45 0 ʵ33 34 25
500 630 0 ʵ50 0 ʵ38 38 29
630 800 0 ʵ75 0 ʵ45 55 34

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