SKF - Industrial Shaft Seals

Table 9
Housing bore tolerances
B
15–30°
r
A
2
D H8
Housing bore for metric seals (ISO) Housing bore for inch-size seals (RMA)
Nominal
Housing bore tolerance Fillet
Nominal
Housing bore tolerance Fillet
diameter
(ISO tolerance H8) radii
diameter
radii
D r D r
over incl. high low max over incl. high low max
mm µm mm in. in. in.
– 3 +14 0 0,3 – 3.000 +0.001 –0.001 0.031
3 6 +18 0 0,3 3.000 7.000 +0.0015 –0.0015 0.031
6 10 +22 0 0,3 7.000 10.000 +0.002 –0.002 0.031
10 18 +27 0 0,3 10.000 2) 12.000 +0.002 –0.002 0.031
18 30 +33 0 0,3 12.000 2) 20.000 +0.003 –0.003 0.031
30 50 +39 0 0,3 20.000 2) 40.000 +0.004 –0.004 0.031
50 80 +46 0 0,4 40.000 2) 60.000 +0.006 –0.006 0.031
80 120 +54 0 0,8
120 180 +63 0 0,8
180 250 +72 0 0,8
250 315 +81 0 0,8
315 400 +89 0 0,8
400 500 +97 0 0,8
500 630 +110 0 0,8
630 800 +125 0 0,8
800 1 000 +140 0 0,8
1 000 1 250 +165 0 0,8
1 250 1 600 +195 0 0,8
1 600 2 000 +230 0 0,8
2 000 2 500 +280 0 0,8
2 500 3 150 +330 0 0,8
3 150 1) 4 000 +410 0 0,8
4 000 1) 5 000 +500 0 0,8
1) SKF recommended bore specifications not covered in ISO 286-2
2) SKF recommended bore specifications not covered in RMA OS-4
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