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Table 8. 3 Tolerances for Metric Design Tapered Roller Bearings
Table 8. 3. 1 Tolerances for Inner Ring Bore Diameter and Running Accuracy
Units : μ m
Nominal Bore & dmp & ds V dp V dmp K ia S d S ia
Diameter Normal Class 6 Class 4 Class 4 Normal Class Class Class Normal Class Class Class Normal Class Class Class Class Class Class T
Class 6X Class 5 Class 6X 6 5 4 Class 6X 6 5 4 Class 6X 6 5 4 5 4 4 C
d B
(mm) jd jD
over incl. high low high low high low high low max. max. max. max. max. max. max. max. max. max. max. max. max. max. max. B2
C
10 18 0 - 8 0 - 7 0 - 5 0 - 5 8 7 5 4 6 5 54 15 7 3.5 2.5 7 3 3
18 30 0 -10 0 - 8 0 - 6 0 - 6 10 8 6 5 8 6 5 4 jd jD
30 50 0 -12 0 -10 0 - 8 0 - 8 12 10 8 6 9 8 5 5 18 8 4 3 844
C4
20 10 5 4 844 B4
50 80 0 -15 0 -12 0 -9 0 -9 15 12 9 7 11 9 65 25 10 5 4 854 jd jD
80 120 0 -20 0 -15 0 -10 0 -10 20 15 11 8 15 11 85
120 180 0 -25 0 -18 0 -13 0 -13 25 18 14 10 19 14 97 30 13 6 5 955 A 65
35 18 8 6 10 6 7
180 250 0 -30 0 -22 0 -15 0 -15 30 22 17 11 23 16 11 8 50 20 10 8 11 7 8
250 315 0 -35 0 -25 0 -18 0 -18 60 25 13 10 13 8 10
315 400 0 -40 0 -30 0 -23 0 -23 35 - - - 26 - - - 70 30 15 12 15 10 14
40 - - - 30 - - -
400 500 0 -45 0 -35 0 -27 0 -27 - - - - - - - - 70 35 18 14 19 13 17
500 630 0 -50 0 -40 - - -- --------
630 800 0 -75 0 -60 - - -- -------- 85 40 20 - 22 - -
100 45 22 - 27 - -
Remarks 1. The bore diameter "no-go side" tolerances (high) specified in this table do not necessarily apply within a distance
of 1.2 times the chamfer dimension r (max.) from the ring face.
2. Some of these tolerances conform to the NSK Standard.
Table 8. 3. 2 Tolerances for Outer Ring Outside Diameter and Running Accuracy
Units : μ m
Nominal Outside & Dmp & Ds V Dp V Dmp K ea S D S ea
Diameter Normal Class 6 Class 4 Class 4 Normal Class Class Class Normal Class Class Class Normal Class Class Class Class Class Class
Class 6X Class 5 Class 6X 6 5 4 Class 6X 6 5 4 Class 6X 6 5 4 5 4 4
D
(mm)
over incl. high low high low high low high low max. max. max. max. max. max. max. max. max. max. max. max. max. max. max.
18 30 0 - 9 0 - 8 0 - 6 0 - 6 98657654 18 9 6 4 8 4 5
30 50 0 - 11 0 - 9 0 - 7 0 - 7 11 9 7 5 8 7 5 5 20 10 7 5 8 4 5
50 80 0 - 13 0 -11 0 - 9 0 - 9 13 11 8 7 10 8 6 5 25 13 8 5 8 4 5
80 120 0 - 15 0 -13 0 -10 0 -10 15 13 10 8 11 10 7 5 35 18 10 6 9 5 6
120 150 0 - 18 0 -15 0 -11 0 -11 18 15 11 8 14 11 8 6 40 20 11 7 10 5 7
150 180 0 - 25 0 -18 0 -13 0 -13 25 18 14 10 19 14 9 7 45 23 13 8 10 5 8
180 250 0 - 30 0 -20 0 -15 0 -15 30 20 15 11 23 15 10 8 50 25 15 10 11 7 10
250 315 0 - 35 0 -25 0 -18 0 -18 35 25 19 14 26 19 13 9
315 400 0 - 40 0 -28 0 -20 0 -20 40 28 22 15 30 21 14 10 60 30 18 11 13 8 10
70 35 20 13 13 10 13
400 500 0 - 45 0 -33 0 -23 0 -23 45 - - - 34 - - - 80 40 23 15 15 11 15
500 630 0 - 50 0 -38 0 -28 0 -28 50 - - - 38 - - - 100 50 25 18 18 13 18
630 800 0 - 75 0 -45 - - -- --------
120 60 30 - 20 - -
800 1 000 0 -100 0 -60 - - -- --------
120 75 35 - 23 - -
Remarks 1. The outside diameter "no-go side" tolerances (low) specified in this table do not necessarily apply within a distance
of 1.2 times the chamfer dimension r (max.) from the ring face.
2. Some of these tolerances conform to the NSK Standard.
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