GRN® 120x140x10 NBR AO/TC is a double lip rotary shaft seal / oil seal. Dimensions: d = 120 mm, D = 140 mm, B = 10 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® + 120x140x10 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® 120x140x10 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 120x140x10 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 = 10 mm axial width. This distinguishes it from the closely related 120x140x12 and 120x140x13 shaft seals, which have the same nominal shaft and outside diameters but different axial widths.
Complete product identification:
GRN® + 120x140x10 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: 120x140x10 mm
Shaft diameter d: 120 mm
Outside diameter D: 140 mm
Width B: 10 mm
Primary sealing lip: Spring-loaded
Additional lip: Auxiliary dust lip
For precise technical identification, retain the complete combination:
120x140x10 mm + NBR + AO/TC + GRN®
The nominal installation dimensions are:
d = 120 mm - nominal shaft diameter
D = 140 mm - nominal seal outside diameter / corresponding housing bore diameter
B = 10 mm - nominal axial seal width
Complete size:
120x140x10 mm
The 120 mm dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.
The 140 mm dimension defines the nominal outside diameter of the seal and the corresponding nominal housing bore.
The 10 mm dimension specifies the nominal axial width of this exact variant.
All three dimensions should be retained during identification and replacement selection. The designation should not be shortened to 120x140, because this dimensional family also includes seals with 12 mm and 13 mm 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 designation is manufacturer- and product-specific terminology and should not automatically be treated as technically identical to every double lip profile used by other shaft seal manufacturers.
GRN® 120x140x10 NBR AO/TC is a radial shaft sealing element designed to create a dynamic sealing interface between a rotating shaft and a stationary housing.
Its principal dimensions are:
d = 120 mm
D = 140 mm
B = 10 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 a secondary protective barrier on the external side of the primary sealing arrangement.
The seal itself is a sealing component and is not intended to perform the load-carrying function of a rolling bearing.
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® 120x140x10 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 presented as confirmed technical specifications for this exact GRN® variant.
The designation can be interpreted as follows:
120 - nominal shaft diameter in mm
140 - nominal outside diameter in mm
10 - nominal axial width in mm
NBR - Nitrile Butadiene Rubber
AO/TC - double lip sealing configuration
GRN® - product brand
Complete identification:
GRN® + 120x140x10 + NBR + AO/TC
For this product family, the third dimension is particularly important:
B = 10 mm
It distinguishes this exact product from other GRN® 120x140 shaft seal variants.
A shaft seal should not be identified only by its shaft diameter and outside diameter.
For this product, the complete dimensional specification is:
120x140x10 mm
The B = 10 mm width is an integral part of the product identification.
This is particularly important because closely related GRN® products include:
120x140x10
120x140x12
120x140x13
All three share:
d = 120 mm
D = 140 mm
but differ in axial width.
Keeping the complete dimensions in the product name, H1, technical specification and description helps prevent incorrect product selection and keeps each product page aligned with a distinct search query.
Both variants have identical nominal diameters:
d = 120 mm
D = 140 mm
Their axial widths differ:
GRN® 120x140x10 - B = 10 mm
GRN® 120x140x12 - B = 12 mm
The difference is:
2 mm in axial width
They are therefore separate dimensional variants.
A 120x140x12 shaft seal should not automatically be used as a replacement for a 120x140x10 seal, or vice versa. The required width and installation geometry should be verified.
The 120x140x10 and 120x140x13 variants also share:
d = 120 mm
D = 140 mm
Their widths are:
GRN® 120x140x10 - B = 10 mm
GRN® 120x140x13 - B = 13 mm
The difference is:
3 mm in axial width
These should therefore be treated as separate dimensional products.
The exact search terms 120x140x10, 120x140x12 and 120x140x13 should lead to their corresponding product variants rather than being combined into one generic 120x140 product page.
When selecting a replacement for GRN® 120x140x10 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.
Matching d = 120 mm and D = 140 mm alone does not establish interchangeability.
The 10 mm axial width is part of the dimensional specification.
Likewise, another manufacturer's 120x140x10 shaft seal should not automatically be considered technically interchangeable solely because its nominal dimensions match. Material, lip design and application requirements should also be verified.
| 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 | 120x140x10 mm |
| Shaft diameter d | 120 mm |
| Outside diameter D | 140 mm |
| Width B | 10 mm |
| Primary sealing lip | Spring-loaded |
| Additional lip | Auxiliary dust lip |
The nominal dimensions are 120x140x10 mm: shaft diameter d = 120 mm, outside diameter D = 140 mm and axial width B = 10 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 = 140 mm, but their widths differ. The 120x140x10 variant has B = 10 mm, while the 120x140x12 variant has B = 12 mm, a difference of 2 mm.
Direct interchangeability should not be assumed. Their axial widths differ by 3 mm, so the required installation geometry and complete technical specification should be checked.
No. Matching dimensions alone do not establish complete technical interchangeability. The material, lip configuration, design and relevant operating conditions should also be compared.
GRN® 120x140x10 NBR AO/TC is a double lip radial shaft seal with nominal dimensions of d = 120 mm, D = 140 mm and B = 10 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® 120x140x10 NBR AO/TC is a double lip rotary shaft seal / oil seal. Dimensions: d = 120 mm, D = 140 mm, B = 10 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® + 120x140x10 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.
