TECH INFO

Oil Seal Glossary

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Oil Seal Tolerance

TABLE 1. SHAFT TOLERANCE (IMPERIAL)
NOMINAL SHAFT DIAMETERTOLERANCE
up to 4.000 ± 0.003
over 4.000 to 6.000 ± 0.004
over 6.000 to 10.000 ± 0.005
over 10.000 ± 0.006
TABLE 2. SHAFT TOLERANCE (METRIC)
SHAFT DIA.TOLERANCE in μm
overtoLowerupper
0 3 0 -60
3 6 0 -75
6 10 0 -90
10 18 0 -110
18 30 0 -130
30 50 0 -160
50 80 0 -190
80 120 0 -220
120 180 0 -250
180 250 0 -290
250 315 0 -320
315 400 0 -360
400 500 0 -400
TABLE 3. HOUSING TOLERANCE (IMPERIAL)
BORE DIA. (inch)BORE TOLERANCE
up to 3.000 ± 0.0010
3.001 to 6.000 ± 0.0015
6.001 to 10.000 ± 0.0020
10.001 to 20.000 + 0.002 / -0.004
20.001 to 40.000 + 0.002 / -0.006
40.001 to 60.000 + 0.002 / -0.010
TABLE 4. HOUSING TOLERANCE (METRIC)
BORE DIA. (mm)BORE TOLERANCE
Over 6 to 10 + 0.022 / -0.000
Over 10 to 18 + 0.027 / -0.000
Over 18 to 30 + 0.033 / -0.000
Over 30 to 50 + 0.039 / -0.000
Over 50 to 80 + 0.046 / -0.000
Over 80 to 120 + 0.054 / -0.000
Over 120 to 180 + 0.063 / -0.000
Over 180 to 250 + 0.072 / -0.000
Over 250 to 315 + 0.081 / -0.000
Over 315 to 400 + 0.089 / -0.000
Over 400 to 500 + 0.097 / -0.000
TABLE 5. TOLERANCE OF SEAL O.D (IMPERIAL))
METAL O.D
BOREINTERFERENCE TOLERANCE ROUNDNESS
    ～1.000  + 0.004 ± 0.002 0.005
1.001～2.000 + 0.004 ± 0.002 0.006
2.001～3.000 + 0.004 ± 0.002 0.006
3.001～4.000 + 0.005 ± 0.002 0.007
4.001～6.000 + 0.005 + 0.003/-0.002 0.009
6.001～8.000 + 0.006 + 0.003/-0.002 0.012
8.001～10.000 + 0.008 + 0.004/-0.002 0.015
10.001～20.000 + 0.008 + 0.006/-0.002 0.2% of SEAL O.D
(RUBBER COVERED O.D)
BOREINTERFERENCETOLERANCE ROUNDNESS
    ～1.000  + 0.006 ± 0.003 0.010
1.001～2.000 + 0.007 ± 0.003 0.010
2.001～3.000 + 0.008 ± 0.003 0.014
3.001～4.000 + 0.010 ± 0.004 0.020
4.001～6.000 + 0.012 ± 0.004 0.020
6.001～8.000 + 0.012 ± 0.004 0.025
8.001～10.000 + 0.014 ± 0.004 0.032
10.001～20.000 + 0.016 ± 0.005 0.040
(RUBBER GROOVED O.D)
BOREINTERFERENCETOLERANCE ROUNDNESS
～1.000  0.010 ± 0.003 0.010
1.001～2.000 0.012 ± 0.004 0.010
2.001～3.000 0.014 ± 0.004 0.014
3.001～4.000 0.016 ± 0.004 0.020
4.001～6.000 0.016 + 0.006/-0.004 0.020
6.001～8.000 0.018 + 0.006/-0.004 0.025
8.001～10.000 0.020 + 0.006/-0.004 0.032
10.001～20.000 0.022 + 0.008/-0.004 0.040
TABLE 6. TOLERANCE OF WIDTH (IMPERIAL)
WIDTHTOLERANCE
ALL SIZE ± 0.015
TABLE 7. TOLERANCE OF SEAL O.D (METRIC)
METAL O.D
BORETOLERANCEROUNDNESS
         ～10.00  + 0.20/+ 0.10 0.10
10.01～18.00 + 0.20/+ 0.10 0.10
18.01～30.00 + 0.20/+ 0.10 0.10
30.01～50.00 + 0.20/+ 0.10 0.15
50.01～80.00 + 0.23/+ 0.13 0.20
80.01～120.00 + 0.25/+ 0.15 0.30
120.01～180.00 + 0.28/+ 0.18 0.38
180.01～250.00 + 0.30/+ 0.20 0.38
250.01～300.00 + 0.30/+ 0.20 0.2% of SEAL O.D
300.01～400.00 + 0.35/+ 0.23
RUBBER COVERED O.D
BORETOLERANCEROUNDNESS
～10.00  + 0.30/+ 0.15 0.25
10.01～18.00 + 0.30/+ 0.15 0.25
18.01～30.00 + 0.30/+ 0.15 0.25
30.01～50.00 + 0.30/+ 0.15 0.25
50.01～80.00 + 0.35/+ 0.20 0.35
80.01～120.00 + 0.35/+ 0.20 0.50
120.01～180.00 + 0.45/+ 0.25 0.65
180.01～250.00 + 0.45/+ 0.25 0.80
250.01～300.00 + 0.45/+ 0.25 0.80
300.01～400.00 + 0.55/+ 0.30 1.00
RUBBER GROOVED O.D
BORETOLERANCEROUNDNESS
～10.00  + 0.40/+ 0.20 0.25
10.01～18.00 + 0.40/+ 0.20 0.25
18.01～30.00 + 0.40/+ 0.20 0.25
30.01～50.00 + 0.40/+ 0.20 0.25
50.01～80.00 + 0.45/+ 0.25 0.35
80.01～120.00 + 0.50/+ 0.30 0.50
120.01～180.00 + 0.55/+ 0.35 0.65
180.01～250.00 + 0.70/+ 0.40 0.80
250.01～300.00 + 0.70/+ 0.40 0.80
300.01～400.00 + 0.75/+ 0.45 1.00
TABLE 8. TOLERANCE OF WIDTH (METRIC)
WIDTHTOLERANCE
≤10.00 ± 0.20
OVER 10.01 ± 0.30

Material Characteristics

TABLE 9. SPECIFICATION OF METALLIC INSERT AND GARTER SPRING
STANDARDSAE No.DIN No.MATERIAL
METALLIC INSERT 1008-1010 1624 Carbon Steel
30304 17224 Stainless Steel
GARTER SPRING 1070-1090 17223 Carbon Steel
30304 17224 Stainless Steel
Rubber Material Selecting Range
SHAFT SPEED V.S MATERIAL
Temperature Reisistance of Rubber Materials
Rubber Material Properties