Rotary Shaft Seal 120x150x12 NBR SC GRN is a single-lip oil seal for a 120 mm shaft and 150 mm housing bore, with a width of 12 mm. Made from NBR, the SC design features a spring-loaded primary sealing lip, rubber-covered outside diameter and no additional dust lip. GRN rotary shaft seals have been available from TG Ersatzteile Polska since 2007. Stock in Poland with worldwide shipping.
Rotary Shaft Seal 120x150x12 NBR SC GRN is a single-lip radial shaft seal with dimensions 120x150x12 mm, manufactured from NBR (Nitrile Butadiene Rubber). The SC design features a spring-loaded primary sealing lip and a rubber-covered outside diameter. It does not have an additional dust lip.
| Parameter | Value |
|---|---|
| Product type | Rotary shaft seal / oil seal |
| Brand | GRN |
| Design | SC |
| Dimensions | 120x150x12 mm |
| d - shaft diameter | 120 mm |
| D - housing bore diameter | 150 mm |
| B - width | 12 mm |
| Elastomer material | NBR |
| Design type | Single lip |
| Primary lip | Sealing lip |
| Additional dust lip | No |
| Garter spring | Yes |
| Outside diameter | Rubber covered |
The dimensions specify the nominal installation size of the rotary shaft seal:
120 mm - nominal shaft diameter.
150 mm - nominal housing bore diameter.
12 mm - nominal seal width.
When selecting a replacement, all three dimensions must be checked together with the elastomer material, lip configuration and outside diameter design.
SC is a commonly used designation for a single-lip rotary shaft seal with a rubber-covered outside diameter.
The typical SC construction includes:
one primary sealing lip
garter spring supporting the primary sealing lip
rubber-covered outside diameter
internal metal reinforcement
no additional dust lip
The primary sealing lip operates directly against the rotating shaft and is responsible for retaining the lubricant or other compatible medium.
The garter spring helps maintain appropriate radial contact between the sealing lip and shaft surface.
Seal designation systems are not completely standardized between all manufacturers. When replacing an oil seal, the actual profile, dimensions, material and lip arrangement should therefore always be verified.
The sealing element is manufactured from NBR (Nitrile Butadiene Rubber).
NBR is one of the most widely used elastomers for conventional rotary shaft seals. It provides good resistance to many mineral oils and greases together with good mechanical and wear properties.
Suitability should always be confirmed for the actual medium and operating conditions, including temperature and shaft surface speed.
The GRN 120x150x12 NBR SC uses one primary sealing lip operating against the rotating shaft surface.
A garter spring supports the sealing lip and helps maintain contact pressure as the seal operates.
Unlike a double-lip TC design, the SC design does not incorporate an additional dust lip.
The rubber-covered outside diameter provides static sealing between the seal and the housing bore and can accommodate minor surface irregularities in the housing.
The key difference is the number of lips.
SC - single-lip oil seal with one spring-loaded primary sealing lip and no additional dust lip.
TC - double-lip oil seal with a spring-loaded primary sealing lip and an additional secondary dust lip.
Therefore, an SC and TC oil seal should not automatically be treated as identical even if they have the same nominal dimensions.
The appropriate design should be selected according to the sealing arrangement and required protection against external contamination.
Before selecting a replacement, verify:
shaft diameter: 120 mm
housing bore diameter: 150 mm
seal width: 12 mm
elastomer: NBR
design: SC
single-lip construction
sealed medium
operating temperature
shaft surface speed
shaft sealing surface condition
lubrication conditions
required protection against external contaminants
Matching 120x150x12 mm dimensions alone does not guarantee full interchangeability.
Before installation, thoroughly clean the shaft and housing bore.
The shaft surface in contact with the sealing lip should be free from burrs, sharp edges, corrosion, scratches and other defects that could damage the lip or impair sealing performance.
During installation:
protect the sealing lip from sharp edges
avoid folding or damaging the lip
press the seal evenly into the housing
avoid tilting the seal during installation
ensure that the sealing lip is correctly oriented
The primary sealing lip should normally face the medium that is to be retained.
GRN rotary shaft seals have been part of the TG Ersatzteile Polska product range since 2007.
The GRN range includes rotary shaft seals in numerous dimensions, elastomer materials and construction variants, including single-lip and double-lip designs for industrial sealing requirements.
The seal has a nominal shaft diameter of 120 mm, housing bore diameter of 150 mm and width of 12 mm. The complete size is 120x150x12 mm.
The sealing element is manufactured from NBR (Nitrile Butadiene Rubber).
Yes. The SC profile is a single-lip design with one primary sealing lip.
Yes. The primary sealing lip is supported by a garter spring.
No. The SC design does not have the additional secondary dust lip characteristic of a TC-type double-lip design.
SC is a single-lip design. TC is a double-lip design with an additional secondary dust lip.
NBR provides good resistance to many mineral oils and greases. Compatibility must nevertheless be checked against the specific medium and actual operating conditions.
Not automatically. Dimensions, NBR material, SC profile, lip arrangement and actual operating requirements should all be verified before replacement.
GRN Rotary Shaft Seal 120x150x12 NBR SC is a single-lip oil seal for a 120 mm shaft and 150 mm housing bore. It has a width of 12 mm and is manufactured from NBR. The SC design combines a spring-loaded primary sealing lip with a rubber-covered outside diameter and does not incorporate an additional dust lip.
Available from simmering.pl, a specialist supplier of rotary shaft seals, industrial sealing solutions and bearings. Stock in Poland with worldwide shipping.
seals, industrial sealing solutions and bearings. Stock in Poland with worldwide shipping.
Data sheet
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Rotary Shaft Seal 120x150x12 NBR SC GRN is a single-lip oil seal for a 120 mm shaft and 150 mm housing bore, with a width of 12 mm. Made from NBR, the SC design features a spring-loaded primary sealing lip, rubber-covered outside diameter and no additional dust lip. GRN rotary shaft seals have been available from TG Ersatzteile Polska since 2007. Stock in Poland with worldwide shipping.
