ball and roller bearings - NTN Bearing Corporation of

Outside
Diameter
D
Nominal
mm
OUTER RING
BEARING OUTSIDE DIAMETER
Dm D
Deviations Deviations
Radial Run-Out
Re
Max.
Class O hB Class 6,5 Class 4 Class O hB Class 6,5 Class 4 Class Class Class Class
Over Incl. High Low High Low High Low Max. Min. Max. Min. Max. Min 0 6 5 4
Outside
Diameter
D
Nominal
inch
Table 7 (Tolerance Limits in 0.001 mm)
Table 7-A (Tolerance Limits in 0.0001 inch)
OUTER RING
BEARING OUTSIDE DIAMETER
Dm D
Deviations Deviations
TOLERANCE
TABLES
18 30 + 0 - 9 + 0 - 8 + 0 - 6 + 2 - 11 + 1 - 9 + 0 - 6 18 9 6 4
30 50 + 0 - 11 + 0 - 9 + 0 - 7 + 3 - 14 + 2 - 11 + 0 - 7 20 10 7 5
50 80 + 0 - 13 + 0 - 11 + 0 - 9 + 4 - 17 + 2 - 13 + 0 - 9 25 13 8 5
80 120 + 0 - 15 + 0 - 13 + 0 - 10 + 5 - 20 + 2 - 15 + 0 - 10 35 18 10 6
120 150 + 0 - 18 + 0 - 15 + 0 - 11 + 6 - 24 + 3 - 18 + 0 - 11 40 20 11 7
150 180 + 0 - 25 + 0 - 18 + 0 - 13 + 7 - 32 + 3 - 21 + 0 - 13 45 23 13 8
180 250 + 0 - 30 + 0 - 20 + 0 - 15 + 8 - 38 + 4 - 24 + 0 - 15 50 25 15 10
250 315 + 0 - 35 + 0 - 25 + 0 - 18 + 9 - 44 + 4 - 29 + 0 - 18 60 30 18 11
315 400 + 0 - 40 + 0 - 28 + 0 - 20 + 10 - 50 + 5 - 33 + 0 - 20 70 35 20 13
400 500 + 0 - 45 — — — — + 12 - 57 — — — — 80 — — —
500 630 + 0 - 50 — — — — + 14 - 64 — — — — 100 — — —
Radial Run-Out
Re
Max.
Class O hB Class 6,5 Class 4 Class O hB Class 6,5 Class 4 Class Class Class Class
Over Incl. High Low High Low High Low Max. Min. Max. Min. Max. Min 0 6 5 4
.7087 1.1811 + 0 - 3.5 + 0 - 3.1 + 0 - 2.4 + .8 - 4.3 + .4 - 3.5 + 0 - 2.4 7.1 3.5 2.4 1.6
1.1811 1.9685 + 0 - 4.3 + 0 - 3.5 + 0 - 2.8 + 1.2 - 5.5 + .8 - 4.3 + 0 - 2.8 7.9 3.9 2.8 2.0
1.9685 3.1496 + 0 - 5.1 + 0 - 4.3 + 0 - 3.5 + 1.6 - 6.7 + .8 - 5.1 + 0 - 3.5 9.8 5.1 3.1 2.0
3.1496 4.7244 + 0 - 5.9 + 0 - 5.1 + 0 - 3.9 + 2.0 - 7.9 + .8 - 5.9 + 0 - 3.9 13.8 7.1 3.9 2.4
4.7244 5.9055 + 0 - 7.1 + 0 - 5.9 + 0 - 4.3 + 2.4 - 9.4 + 1.2 - 7.1 + 0 - 4.3 15.7 7.9 4.3 2.8
5.9055 7.0866 + 0 - 9.8 + 0 - 7.1 + 0 - 5.1 + 2.8 - 12.6 + 1.2 - 8.3 + 0 - 5.1 17.7 9.1 5.1 3.1
7.0866 9.8425 + 0 - 11.8 + 0 - 7.9 + 0 - 5.9 + 3.1 - 15.0 + 1.6 - 9.4 + 0 - 5.9 19.7 9.8 5.9 3.9
9.8425 12.4016 + 0 - 13.8 + 0 - 9.8 + 0 - 7.1 + 3.5 - 17.3 + 1.6 - 11.4 + 0 - 7.1 23.6 11.8 7.1 4.3
12.4016 15.7480 + 0 - 15.7 + 0 - 11.0 + 0 - 7.9 + 3.9 - 19.7 + 2.0 - 13.0 + 0 - 7.9 27.6 13.8 7.9 5.1
15.7480 19.6850 + 0 - 17.7 — — — — + 4.7 - 22.4 — — — — 31.5 — — —
19.6850 24.8031 + 0 - 19.7 — — — — + 5.5 - 25.2 — — — — 39.4 — — —
Dm is defined as the arithmetical mean of the largest and the smallest single diameter of the outside surface obtained by two-point measurements.
hB is the symbol for limit deviations of DM and D for Class 0.
The values of deviation of D are valid for two-point measurements only.
Deviations of D for Class 0 apply only to diameter series 0, 2 and 3, and do not apply to either of the following cases: over 80 mm of D in diameter series 0, or
over 315 mm of D in diameter series 2.
Deviations of D for Class 6 apply only to diameter series 0, 2 and 3, and do not apply to the case of over 95 mm of D in diameter series 0.
REMARKS:
The low deviations of outside diameter specified in this table do not apply within a distance of twice the nominal ring chamfer dimensions from the ring face.
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