ball and roller bearings - NTN Bearing Corporation of America

TOLERANCE
TABLES
Bore
Diameter
d
nominal
260
mm
Over Incl.
Tolerance Limits for:
Metric series tapered roller bearings.
Bore Diameter
dm � d �
Deviations Deviations
INNER RING
Class O KB � Class 6,5 Class 4 Class O KB � Class 6,5 Class 4
High Low High Low High Low Max. Min. Max. Min. Max. Min.
10 18 0 - 8 0 - 7 0 - 5 + 3 - 11 + 1 - 8 0 - 5
18 30 0 - 10 0 - 8 0 - 6 + 3 - 13 + 1 - 9 0 - 6
30 50 0 - 12 0 - 10 0 - 8 + 3 - 15 + 1 - 11 0 - 8
50 80 0 - 15 0 - 12 0 - 9 + 4 - 19 + 2 - 14 0 - 9
80 120 0 - 20 0 - 15 0 - 10 + 5 - 25 + 3 - 18 0 - 10
120 180 0 - 25 0 - 18 0 - 13 + 6 - 31 + 3 - 21 0 - 13
180 250 0 - 30 0 - 22 0 - 15 + 8 - 38 + 4 - 26 0 - 15
250 315 0 - 35 — — — — + 9 - 44 — — — —
315 400 0 - 40 — — — — + 10 - 50 — — — —
Bore
Diameter
d
nominal
inch
Over Incl.
Width
B
Deviations
(Inner Ring)
Class 0,6,5 Class 4
High Low High Low
Table 6-A (Tolerance Limits in 0.0001 inch)
INNER RING
Bore Diameter
dm � d �
Deviations Deviations
Class O KB � Class 6,5 Class 4 Class O KB � Class 6,5 Class 4
High Low High Low High Low Max. Min. Max. Min. Max. Min.
.3937 .7087 0 - 3.1 0 - 2.8 0 - 2.0 + 1.2 - 4.3 + .4 - 3.1 0 - 2.0
.7087 1.1811 0 - 3.9 0 - 3.1 0 - 2.4 + 1.2 - 5.1 + .4 - 3.5 0 - 2.4
1.1811 1.9685 0 - 4.7 0 - 3.9 0 - 3.1 + 1.2 - 5.9 + .4 - 4.3 0 - 3.1
1.9685 3.1496 0 - 5.9 0 - 4.7 0 - 3.5 + 1.6 - 7.5 + .8 - 5.5 0 - 3.5
3.1496 4.7244 0 - 7.9 0 - 5.9 0 - 3.9 + 2.0 - 9.8 + 1.2 - 7.1 0 - 3.9
4.7244 7.0866 0 - 9.8 0 - 7.1 0 - 5.1 + 2.4 - 12.2 + 1.2 - 8.3 0 - 5.1
7.0866 9.8425 0 - 11.8 0 - 8.7 0 - 5.9 + 3.1 - 15.0 + 1.6 - 10.2 0 - 5.9
9.8425 12.4016 0 - 13.8 — — — — + 3.5 - 17.3 — — — —
12.4016 15.7480 0 - 15.7 — — — — + 3.9 - 19.7 — — — —
Bearing Width
T
Deviations
(Overall)
Class O Class 6,5,4
High Low High Low
Radial Run-Out
Ri
Maximum
Class
0 6 5 4
0 - 200 0 - 200 + 200 - 200 + 200 0 15 7 3.5 2.5
0 - 200 0 - 200 + 200 - 200 + 200 0 18 8 4 3
0 - 240 0 - 240 + 200 - 200 + 200 0 20 10 5 4
0 - 300 0 - 300 + 200 - 200 + 200 0 25 10 5 4
0 - 400 0 - 400 + 300 - 300 + 200 - 200 30 13 6 5
0 - 500 0 - 500 + 400 - 400 + 350 - 250 35 18 8 6
0 - 600 0 - 600 + 500 - 500 + 350 - 250 50 20 10 8
0 - 700 — — + 600 - 600 — — 60 — — —
0 - 800 — — + 700 - 700 — — 70 — — —
Width
B
Deviations
(Inner Ring)
Class 0,6,5 Class 4
High Low High Low
Bearing Width
T
Deviations
(Overall)
Class O Class 6,5,4
High Low High Low
Radial Run-Out
Ri
Maximum
Class
0 6 5 4
0 - 78.7 0 - 78.7 + 78.7 - 78.7 + 78.7 0 5.9 2.8 1.4 1.0
0 - 78.7 0 - 78.7 + 78.7 - 78.7 + 78.7 0 7.1 3.1 1.6 1.2
0 - 94.5 0 - 94.5 + 78.7 - 78.7 + 78.7 0 7.9 3.9 2.0 1.6
0 - 118.1 0 - 118.1 + 78.7 - 78.7 + 78.7 0 9.8 3.9 2.0 1.6
0 - 157.5 0 - 157.5 + 118.1 - 118.1 + 78.7 - 78.7 11.8 5.1 2.4 2.0
0 - 196.9 0 - 196.9 + 157.5 - 157.5 + 137.8 - 98.4 13.8 7.1 3.1 2.4
0 - 236.2 0 - 236.2 + 196.5 - 196.5 + 137.8 - 98.4 19.7 7.9 3.9 3.1
0 - 275.6 — — + 236.2 - 236.2 — — 23.6 — — —
0 - 315.0 — — + 275.6 - 275.6 — — 27.6 — — —
� dm is defined as the arithmetical mean of the largest and the smallest single diameter of the bore obtained by two-point measurements.
� 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 40 mm of d in diameter series 0, or
over 180 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 60 mm of d in diameter series 0.
Deviations of d for Class 5 apply only to diameter series 0, 2 and 3.
� KB is the symbol for limit deviations of dm and d for Class 0.
Table 6 (Tolerance Limits in 0.001 mm)
REMARKS:
The high deviations of bore diameter specified in this table do not apply within a distance of twice the nominal ring chamfer dimension from the ring face.