GRN® 120x150x12 NBR AO/TC is a double lip rotary shaft seal / oil seal. Dimensions: d = 120 mm, D = 150 mm, B = 12 mm. Material: NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary sealing lip with an additional auxiliary dust lip. Exact identification: GRN® + 120x150x12 mm + NBR + AO/TC.
Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4.
24h Shipping. Available from stock in Poland for delivery across the EU.
GRN® 120x150x12 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 120x150x12 mm. It is manufactured from NBR - Nitrile Butadiene Rubber and uses the AO/TC double lip configuration. The primary dynamic sealing lip is spring-loaded, while the additional auxiliary lip provides a protective barrier on the external side of the primary sealing zone.
A key identification feature of this exact variant is its B = 12 mm axial width, which distinguishes it from the closely related 120x150x13 dimensional variant.
Complete product identification:
GRN® + 120x150x12 mm + NBR + AO/TC
The principal identification parameters are:
Brand: GRN®
Product type: Radial shaft seal / rotary shaft seal / oil seal
Design: AO/TC
Configuration: Double lip
Material: NBR
Material name: Nitrile Butadiene Rubber
Dimensions: 120x150x12 mm
Shaft diameter d: 120 mm
Outside diameter D: 150 mm
Width B: 12 mm
Primary sealing lip: Spring-loaded
Additional lip: Auxiliary dust lip
For precise technical identification, retain the complete combination:
120x150x12 mm + NBR + AO/TC + GRN®
The nominal installation dimensions are:
d = 120 mm - nominal shaft diameter
D = 150 mm - nominal seal outside diameter / corresponding housing bore diameter
B = 12 mm - nominal axial seal width
Complete size:
120x150x12 mm
The 120 mm dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.
The 150 mm dimension defines the nominal outside diameter of the seal and the corresponding nominal housing bore.
The 12 mm dimension specifies the axial width of this exact variant.
All three dimensions should be retained during identification and replacement selection. The size should not be shortened to 120x150, because seals with the same shaft and outside diameters may have different axial widths.
The AO/TC designation identifies a double lip sealing configuration.
The construction comprises:
Primary sealing lip - operates dynamically against the rotating shaft.
Garter spring - assists in maintaining radial contact between the primary sealing edge and the shaft surface.
Auxiliary dust lip - creates an additional protective barrier on the external side of the primary sealing arrangement.
The spring-loaded primary lip performs the principal dynamic sealing function.
The auxiliary lip has a separate protective role and helps limit external contamination from reaching the primary sealing zone.
The AO/TC profile should not automatically be treated as technically identical to every other double lip shaft seal profile solely because the general construction appears similar.
GRN® 120x150x12 NBR AO/TC is a radial shaft sealing element designed to create a dynamic sealing interface between a rotating shaft and a stationary housing.
The nominal shaft diameter is:
d = 120 mm
The nominal seal outside diameter is:
D = 150 mm
The nominal axial width is:
B = 12 mm
The primary sealing lip operates dynamically against the shaft surface. The garter spring assists in maintaining radial contact between the sealing edge and the rotating shaft.
The additional auxiliary dust lip provides an extra barrier on the external side of the primary sealing arrangement.
This product is a sealing component. It is not a rolling bearing and is not intended to carry radial or axial bearing loads.
The specified sealing material is:
NBR - Nitrile Butadiene Rubber
NBR identifies the elastomer family used for this shaft seal. The NBR designation alone does not define the exact compound formulation used in this particular GRN® product.
Without product-specific manufacturer documentation for the exact GRN® 120x150x12 NBR AO/TC, no specific value should therefore be assigned for:
Shore A hardness,
minimum or maximum operating temperature,
maximum rotational speed,
maximum shaft surface speed,
maximum permissible pressure.
Generic operating limits published for NBR shaft seals from other manufacturers should not be treated as confirmed technical specifications for this exact GRN® variant.
The designation can be interpreted as follows:
120 - nominal shaft diameter in mm
150 - nominal outside diameter in mm
12 - nominal axial width in mm
NBR - Nitrile Butadiene Rubber
AO/TC - double lip sealing configuration
GRN® - product brand
Complete identification:
GRN® + 120x150x12 + NBR + AO/TC
The 12 mm third dimension should not be omitted, because it is essential for distinguishing this product from other 120x150 shaft seals.
These two GRN® shaft seal variants share the same nominal diameters:
d = 120 mm
D = 150 mm
Their axial widths are different:
GRN® 120x150x12 - B = 12 mm
GRN® 120x150x13 - B = 13 mm
The dimensional difference is:
1 mm in axial width
They are therefore two separate dimensional variants.
The 120x150x12 seal should not automatically be replaced by a 120x150x13, or vice versa. The required axial width and actual installation geometry should be verified before substitution.
Keeping separate product pages for these variants also provides precise search intent matching: a user searching specifically for 120x150x12 should reach the 12 mm variant rather than the 13 mm product.
When selecting a replacement for GRN® 120x150x12 NBR AO/TC, verify at least:
Where operating conditions are known, the sealing medium, temperature, shaft speed, pressure, shaft sealing surface and housing geometry should also be checked.
Identical 120x150x12 mm dimensions do not automatically establish full technical interchangeability.
A shaft seal from another manufacturer may have the same nominal dimensions but a different elastomer compound, lip geometry, design designation or operating limits.
| Parameter | Specification |
|---|---|
| Brand | GRN® |
| Product type | Radial shaft seal / rotary shaft seal / oil seal |
| Design | AO/TC |
| Configuration | Double lip |
| Material | NBR |
| Material name | Nitrile Butadiene Rubber |
| Dimensions | 120x150x12 mm |
| Shaft diameter d | 120 mm |
| Outside diameter D | 150 mm |
| Width B | 12 mm |
| Primary sealing lip | Spring-loaded |
| Additional lip | Auxiliary dust lip |
The nominal dimensions are 120x150x12 mm: shaft diameter d = 120 mm, outside diameter D = 150 mm and axial width B = 12 mm.
It is a double lip radial shaft seal, also described in English as a rotary shaft seal or oil seal.
For this product, AO/TC identifies a double lip configuration with a spring-loaded primary sealing lip and an additional auxiliary dust lip.
The specified sealing material is NBR - Nitrile Butadiene Rubber. The exact compound formulation and hardness should not be assumed without product-specific manufacturer documentation.
Yes. The primary dynamic sealing lip is spring-loaded. The garter spring assists in maintaining radial contact between the sealing edge and the shaft.
Both variants have d = 120 mm and D = 150 mm, but their widths differ. The 120x150x12 variant has B = 12 mm, while the 120x150x13 variant has B = 13 mm.
Direct interchangeability should not be assumed. The axial width differs by 1 mm, so the installation geometry and complete technical specification should be checked before substitution.
No. Matching dimensions alone do not establish complete technical interchangeability. The material, lip configuration, design and relevant operating conditions should also be compared.
GRN® 120x150x12 NBR AO/TC is a double lip radial shaft seal with nominal dimensions of d = 120 mm, D = 150 mm and B = 12 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary sealing lip with an additional auxiliary dust lip.
Data sheet
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GRN® 120x150x12 NBR AO/TC is a double lip rotary shaft seal / oil seal. Dimensions: d = 120 mm, D = 150 mm, B = 12 mm. Material: NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary sealing lip with an additional auxiliary dust lip. Exact identification: GRN® + 120x150x12 mm + NBR + AO/TC.
Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4.
24h Shipping. Available from stock in Poland for delivery across the EU.
