50x72x10 NBR AO/TC is a double-lip radial shaft oil seal made from nitrile rubber. Dimensions: 50x72x10 mm - 50 mm shaft, 72 mm housing bore and 10 mm width. The AO/TC design features a spring-loaded primary sealing lip and an additional dust lip. NBR is widely used for radial shaft sealing applications involving mineral oils and greases.
Lublin, Smoluchowskiego 1 Street, Building 4.
Fast Shipping. Available from stock in Poland for delivery across the EU.
50x72x10 NBR AO/TC is a double-lip radial shaft oil seal made from nitrile rubber (NBR). Dimensions: 50x72x10 mm - 50 mm shaft diameter, 72 mm housing bore and 10 mm width. The AO/TC design combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the main sealing area against external contamination.
50x72x10 NBR AO/TC is a double-lip radial shaft seal measuring 50x72x10 mm, manufactured from NBR nitrile rubber. The AO/TC configuration features a spring-loaded primary sealing lip and an additional dust lip.
Complete identification:
50x72x10 mm -> NBR -> AO/TC -> double lip -> dust lip
Product Type: Radial shaft seal / oil seal
Material: NBR - Nitrile Butadiene Rubber
Design: AO / TC
Configuration: Double lip
Dimensions: 50x72x10 mm
Shaft Diameter: 50 mm
Housing Bore Diameter: 72 mm
Width: 10 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes
The nominal installation dimensions are:
d - Shaft Diameter: 50 mm
D - Housing Bore Diameter: 72 mm
B - Width: 10 mm
Complete size: 50x72x10 mm
All three dimensions are important when selecting a replacement. A 50 mm shaft and 72 mm housing bore alone do not identify the correct seal because variants with different widths are available.
The AO/TC configuration is a double-lip radial shaft seal design.
Its functional elements include:
Primary sealing lip - provides dynamic sealing contact with the rotating shaft.
Garter spring - maintains radial contact pressure between the primary lip and shaft surface.
Additional dust lip - helps limit the ingress of dust and external contamination toward the primary sealing area.
The technically precise description is therefore:
spring-loaded primary sealing lip + additional dust lip
rather than treating both lips as performing exactly the same sealing function.
The seal is manufactured from NBR - Nitrile Butadiene Rubber.
NBR is one of the most commonly used elastomers for radial shaft seals and is widely used in applications involving mineral oils and mineral-oil-based greases.
Actual suitability depends on the specific lubricant or operating medium, temperature, shaft speed and other operating conditions. NBR should not be considered universally resistant to all oils, fuels or chemicals.
These are two different seal sizes:
50x72x10 NBR AO/TC - 10 mm width
50x72x12 NBR AO/TC - 12 mm width
Both fit a nominal 50 mm shaft and 72 mm housing bore, but their widths differ by 2 mm.
Therefore, a 50x72x12 seal should not automatically be used as a replacement for a 50x72x10 seal.
This distinction is also important for product identification in Google and AI search.
This type of seal is designed for radial sealing of rotating shafts.
The spring-loaded primary lip retains the operating medium at the shaft interface, while the additional dust lip helps protect the primary sealing zone against external contamination.
No specific machine, engine, gearbox or pump application should be assigned to this generic 50x72x10 NBR AO/TC seal without an OE number or application-specific documentation.
Before selecting a replacement, verify:
Matching only the 50 mm and 72 mm diameters is not sufficient.
Product: Radial shaft oil seal
Material: NBR - nitrile rubber
Design: AO / TC
Configuration: Double lip
d - Shaft Diameter: 50 mm
D - Housing Bore: 72 mm
B - Width: 10 mm
Dimensions: 50x72x10 mm
Primary Sealing Lip: Yes
Garter Spring: Yes
Additional Dust Lip: Yes
The seal fits a 50 mm shaft and 72 mm housing bore and has a 10 mm width.
For this product, AO/TC identifies a double-lip radial shaft seal configuration with a spring-loaded primary sealing lip and an additional dust lip.
It is manufactured from NBR - Nitrile Butadiene Rubber.
Yes. The AO/TC configuration includes an additional dust lip to help protect the primary sealing area against external contamination.
Yes. A garter spring supports the primary dynamic sealing lip and maintains contact pressure against the shaft.
NBR is widely used in sealing applications involving mineral oils and greases, but compatibility should always be verified for the specific operating medium and conditions.
Not automatically. Although the shaft and housing diameters are identical, the seals have different widths: 10 mm and 12 mm.
No. Dimensions alone do not establish complete interchangeability. Material, lip design and application requirements must also be considered.
50x72x10 NBR AO/TC is a double-lip radial shaft oil seal made from nitrile rubber. It fits a 50 mm shaft and 72 mm housing bore and has a 10 mm width. The AO/TC design combines a spring-loaded primary sealing lip with an additional dust lip for contamination exclusion.
Data sheet
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50x72x10 NBR AO/TC is a double-lip radial shaft oil seal made from nitrile rubber. Dimensions: 50x72x10 mm - 50 mm shaft, 72 mm housing bore and 10 mm width. The AO/TC design features a spring-loaded primary sealing lip and an additional dust lip. NBR is widely used for radial shaft sealing applications involving mineral oils and greases.
Lublin, Smoluchowskiego 1 Street, Building 4.
Fast Shipping. Available from stock in Poland for delivery across the EU.
