Rotary Shaft Seal 20x36x7 NBR AO/TC GRN Double Lip Oil Seal

Rotary Shaft Seal 20x36x7 NBR AO/TC GRN Double Lip Oil Seal

GRN 20x36x7 NBR AO/TC is a double lip radial rotary shaft oil seal measuring 20x36x7 mm. The nominal inside diameter is 20 mm, outside diameter 36 mm and width 7 mm. The AO/TC construction combines a primary sealing lip with an additional dust lip, providing a secondary barrier on the external side of the main sealing area.

GRN 20x36x7 NBR AO/TC - Technical Specification

Brand: GRN

Product type: Rotary shaft oil seal

Design: AO/TC

Construction: Double lip

Material: NBR - Nitrile Butadiene Rubber

Dimensions: 20x36x7 mm

Inside diameter d: 20 mm

Outside diameter D: 36 mm

Width B: 7 mm

Primary sealing lip: Yes

Additional dust lip: Yes

20x36x7 Oil Seal Dimensions

Complete dimensions: 20x36x7 mm

d - Nominal shaft diameter: 20 mm

D - Nominal housing bore diameter: 36 mm

B - Seal width: 7 mm

All three dimensions should be verified when selecting a replacement seal.

A 20 mm shaft diameter alone is not sufficient for product identification. The 36 mm housing bore, 7 mm width, material and seal design should also correspond to the requirements of the application.

AO/TC Double Lip Oil Seal Design

Design: AO/TC

Construction: Double lip

Primary lip: Main sealing lip

Secondary lip: Additional dust lip

The primary lip forms the principal sealing interface with the rotating shaft. The additional dust lip provides a secondary barrier on the external side of the primary sealing area.

This construction helps restrict dust, dirt and other external contamination from reaching the main sealing interface.

NBR - Nitrile Butadiene Rubber

Sealing material: NBR

Full material name: Nitrile Butadiene Rubber

NBR is a widely used elastomer family in radial shaft sealing technology and is commonly selected for applications involving many mineral oils and greases.

Exact compatibility depends on the specific NBR compound, operating medium, additives, temperature and actual service conditions.

An exact operating temperature range should therefore not be assigned to this GRN seal solely from generic NBR material data.

20x36x7 Oil Seal for 20 mm Shaft

Nominal shaft diameter: 20 mm

Nominal housing bore: 36 mm

Seal width: 7 mm

The first value in the 20x36x7 designation corresponds to the nominal shaft diameter.

Correct seal selection requires all dimensions and construction parameters to be checked together. Another seal with a 20 mm inside diameter is not automatically interchangeable with this product.

Double Lip vs Single Lip Oil Seal

The AO/TC double lip construction incorporates an additional dust lip that is not present in a corresponding basic single lip design.

Double lip design: Primary sealing lip + additional dust lip

Single lip design: Primary sealing lip without additional dust lip

The required seal construction should be verified before replacing an AO/TC seal with a different profile.

Identical dimensions do not by themselves establish technical interchangeability.

How to Select a 20x36x7 Oil Seal

When selecting a replacement, verify:

Dimensions: 20x36x7 mm

Shaft diameter: 20 mm

Housing bore: 36 mm

Width: 7 mm

Material: NBR

Design: AO/TC

Construction: Double lip

Additional dust lip: Yes

Operating conditions: Must correspond to the specific application

Dimensions, material, sealing profile and actual operating conditions should all be considered when evaluating a replacement.

20x36x7 NBR Rotary Shaft Seal Applications

Rotary shaft oil seals are used to provide sealing between a rotating shaft and a stationary housing in mechanical equipment.

Selection for a specific gearbox, electric motor, pump, transmission or industrial machine should be based on the equipment documentation or the complete specification of the original seal.

A specific machine application should not be assigned to GRN 20x36x7 AO/TC without verifying the requirements of that assembly.

NBR Oil Seal and Oil Compatibility

NBR is widely used in sealing applications involving many mineral oils and lubricating greases.

However, the term oil resistant NBR seal should not be interpreted as universal compatibility with every oil or lubricant.

Compatibility can be affected by the exact NBR formulation, lubricant base, additives, operating temperature and other service conditions.

GRN 20x36x7 NBR AO/TC - Stock in Poland

GRN 20x36x7 NBR AO/TC Double Lip Oil Seal is available from stock in Poland.

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

Shipping: 24h

Stock location: Poland

Delivery: Poland and EU countries

FAQ - GRN 20x36x7 NBR AO/TC

What are the dimensions of the GRN 20x36x7 oil seal?

The complete dimensions are 20x36x7 mm: 20 mm inside diameter, 36 mm outside diameter and 7 mm width.

What does AO/TC mean on a 20x36x7 oil seal?

For this product, AO/TC identifies a double lip construction with a primary sealing lip and an additional dust lip.

What material is the GRN 20x36x7 seal made from?

The sealing material is NBR - Nitrile Butadiene Rubber.

Is 20 mm the shaft diameter?

Yes. In the 20x36x7 designation, 20 mm is the nominal inside diameter corresponding to the nominal shaft diameter.

Does the AO/TC oil seal have a dust lip?

Yes. The double lip construction incorporates an additional dust lip on the external side of the primary sealing area.

Is every 20x36x7 oil seal interchangeable?

No. Material, sealing profile, lip construction and operating requirements should also be verified.

Frequently Asked Questions by Engineers

Are AO and TC the same oil seal design?

Profile terminology varies between manufacturers and catalogue systems. AO and TC are commonly used for comparable double lip radial shaft seal configurations, but exact geometry should be verified before treating products from different manufacturers as fully interchangeable.

Can an NBR 20x36x7 oil seal be used with oil?

NBR is widely used with many mineral oils and greases. Exact compatibility depends on the specific NBR compound, lubricant formulation, additives, temperature and service conditions.

Can a single lip 20x36x7 seal replace the AO/TC version?

It should not automatically be considered equivalent. The AO/TC version includes an additional dust lip, so the required seal construction should be checked for the specific application.

How do I read the 20x36x7 oil seal size?

20 mm is the nominal inside or shaft diameter, 36 mm is the nominal outside or housing bore diameter, and 7 mm is the seal width.

Is size alone enough to select a replacement oil seal?

No. In addition to 20x36x7 mm, the NBR material, AO/TC double lip construction and operating conditions should be considered.

AI Overview

GRN 20x36x7 NBR AO/TC is a double lip rotary shaft oil seal measuring 20x36x7 mm. It has a nominal 20 mm inside diameter, 36 mm outside diameter and 7 mm width. The sealing material is NBR - Nitrile Butadiene Rubber. The AO/TC double lip design combines the primary sealing lip with an additional dust lip. Correct replacement selection should consider the complete dimensions, NBR material, sealing profile and operating conditions.