SEAL SO
The SC profile is a radial shaft seal, designed for shaft sealing applications, consisting of a single metal case with a rubber coating and a primary sealing lip with an integrated spring. The rubber coating is applied by injection molding.
- Good static sealing.
- Compensation of different thermal expansion.
- Reduced risk of fretting corrosion.
- A higher surface roughness of the bore is allowed.
- Installation in split housings.
- Injection-molded rubber coating
See our seal Installation Guide to perform a correct installation of the seal.
| ø | ºC | bar | m/s |
|---|---|---|---|
|
10-790 mm |
-55ºC/225ºC |
≤0.3 bar |
≤10 m/s |
MATERIALS
Elastomer
NBR 70-75 Shore A
FKM 75-80 Shore A
VMQ 70-75 Shore A
ACM 70-75 Shore A
EPDM 70-75 Shore A
HNBR 70-75 Shore A
Metal casing
AISI 1060-90 - AISI 304 - AISI 316
Spring
AISI 1060-90 - AISI 302 - AISI 304 - AISI 316
| MANUFACTURER | EQUIVALENCE |
|---|---|
|
SIMRIT |
BA |
|
STEFA |
CB |
|
SKF |
HMS5 |
|
PAULSTRA |
IE |
|
NATIONAL |
33 |
TOLERANCES FOR THE OUTSIDE DIAMETER OF THE OIL SEAL
| Housing diameter | Metal cage | Elastomeric coating | Housing with grooves |
|---|---|---|---|
| ≤50.0 | +0.10 /+0.20 | +0.15/ +0.30 | +0.20/ +0.40 |
| <50.0 ≤80,0 | +0.13/ +0.23 | +0.20/ +0.35 | +0.25/ +0.45 |
| <80.0 ≤120.0 | +0.15/ +0.25 | +0.20/ +0.35 | +0.25/ +0.45 |
| <120.0 ≤180.0 | +0.18/ +0.28 | +0.25/ +0.45 | +0.30/+0.55 |
| <180.0 ≤300.0 | +0.20/ +0.30 | +0.25/ +0.45 | +0.30/ +0.55 |
| <300.0 ≤500.0 | +0.23/ +0.35 | +0.30/ +0.55 | +0.35/ +0.65 |
| <500.≤630.0 | +0.23/ +0.35 | +0.35/ +0.65 | +0.40/ +0.75 |
Seal bore tolerance (Ød)
When not under pressure, the inside diameter of the sealing lip is always smaller than the shaft diameter. The difference between the two dimensions is known as interference or pre-fitting. Depending on the shaft size, the sealing lip diameter is estimated to be between 0.8 mm and 3.5 mm smaller. It will depend on the setting chosen by each manufacturer.
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