Oil Seal Tolerances

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Seal Outside Diameter Tolerance in Imperial
Bore Diameter Press-fit Allowance Tolerance
Metal Case Rubber
Covered
Case 		Metal Case Rubber
Covered
Case
Up to 1.000 +0.004 +0.006 0.002 0.003
1.001 to 2.000 +0.004 +0.007 0.002 0.003

2.001 to 3.000

 +0.004 +0.008 0.002 0.003
3.001 to 4.000 +0.005 +0.010 0.002 0.004
4.001 to 6.000 +0.005 0+0.010

+0.003/-0.002

 0.004
6.001 to 8.000 +0.006 +0.010 +0.003/-0.002 0.004
8.001 to 10.000 +0.008 +0.010 +0.004/-0.002 0.004
10.001 to 20.000 +0.008 +0.010 +0.006/-0.002 0.004
20.001 to 40.000 +0.008 +0.010 +0.008/-0.002 0.004
40.001 to 60.000 +0.008 +0.010 +0.010/-0.002 0.004

Seal Outside Diameter Tolerance in Metric
Bore Diameter Press-fit Allowance Permissible
Eccentricity
Metal Case Rubber
Covered Case
Up to 50 +0.20/+0.10 +0.30/+0.15 0.25
Over 50 to 80 +0.23/+0.13 +0.35/+0.20 0.35

Over 80 to 120

 +0.25/+0.15 +0.35/+0.20 0.50
Over 120 to 180 +0.28/+0.18 +0.45/+0.25 0.65
Over 180 to 300 +0.30/+0.20 +0.45/+0.25

0.80
Over 300 to 500 +0.35/+0.23 +0.55/+0.30 1.00

Seal Width Tolerance in Imperial and Metric
Unit Width range Tolerance
inch all 0.015
mm Up to 10 0.20
Over 10 0.30

Shaft Tolerance in Metric
Shaft Diameter Tolerance in m
Voer to Lower Upper
0 3 0 -0.60
3 6 0 -0.75
6 10 0 -0.90
10 18 0 -1.20
18 30 0 -1.40
30 50 0 -1.60
50 80 0 -1.90
80 120 0 -2.20
120 180 0 -2.60
180 250 0 -3.00
250 315 0 -3.40
315 400 0 -3.60
400 500 0 -4.00