NBR Oil Seal 7x16x7 AO/TC GRN - Double Lip Rotary Shaft Seal

NBR Oil Seal 7x16x7 AO/TC GRN - Double Lip Rotary Shaft Seal

NBR Oil Seal 7x16x7 AO/TC GRN is a double-lip rotary shaft seal with dimensions 7x16x7 mm, manufactured from NBR nitrile rubber. The AO/TC design combines a primary spring-loaded sealing lip with an additional dust lip. It is designed for a nominal 7 mm rotating shaft and a 16 mm housing bore, providing fluid retention together with additional protection of the sealing area against external contamination.

Technical data - GRN 7x16x7 AO/TC

Oil seal dimensions - 7x16x7 mm

The designation 7x16x7 mm defines the three principal dimensions of the rotary shaft seal:

7 mm - nominal shaft diameter

16 mm - nominal outside diameter / housing bore

7 mm - nominal seal width

Complete dimensions:

7x16x7 mm

These dimensions are essential when identifying or replacing a rotary shaft seal.

What does AO/TC mean?

AO and TC are design references used in rotary shaft seal nomenclature for configurations incorporating an additional dust lip.

This construction is commonly described as a:

double lip oil seal

double lip rotary shaft seal

oil seal with dust lip

The seal incorporates a primary sealing lip that operates against the rotating shaft and an additional auxiliary lip positioned toward the external environment.

Seal profile designations are not completely universal between manufacturers. When replacing an AO/TC seal with another brand, the actual seal construction should therefore be compared rather than relying only on the letter code.

Double lip oil seal design

GRN 7x16x7 AO/TC incorporates two functional lips.

The primary sealing lip is the main sealing element and operates against the rotating shaft surface.

The auxiliary dust lip helps reduce the ingress of dust and external contamination into the primary sealing area.

This configuration is particularly useful where the main sealing lip requires additional protection from environmental contamination.

NBR nitrile rubber

The seal is manufactured from NBR - nitrile rubber, one of the most widely used elastomers for rotary shaft seals.

NBR combines useful mechanical properties with good resistance to many mineral oils and greases.

Typical NBR characteristics include:

• good resistance to many mineral oils

• good resistance to greases

• good abrasion resistance

• good mechanical properties

• widespread use in industrial sealing systems

NBR is not universally resistant to every chemical or operating environment.

Compatibility with the actual fluid, temperature and operating conditions should always be verified for the specific application.

How does the 7x16x7 oil seal work?

The outside surface of the seal is installed in a housing bore with a nominal diameter of 16 mm.

The primary sealing lip operates against a rotating shaft with a nominal diameter of 7 mm.

A garter spring helps maintain contact between the primary sealing lip and the shaft surface.

The additional dust lip faces the external environment and helps protect the primary sealing zone against contamination.

AO/TC vs single lip oil seal

The principal difference is the additional dust lip.

AO/TC - double-lip design with a primary sealing lip and auxiliary dust lip.

Single-lip design - primary sealing lip without an additional dust lip.

The correct design should be selected according to the operating conditions and sealing requirements of the specific machine.

NBR vs FKM/FPM oil seals

Rotary shaft seals with identical dimensions can be manufactured from different elastomers.

NBR is widely used in standard oil- and grease-lubricated systems.

FKM/FPM is a different elastomer family typically selected where the characteristic temperature and chemical resistance profile of a fluoroelastomer is required.

A 7x16x7 NBR seal and a 7x16x7 FKM seal should not be considered automatically interchangeable without checking the operating medium, temperature, shaft speed and other application conditions.

Typical applications

Double-lip rotary shaft seals are used in many mechanical systems incorporating rotating shafts.

Typical application areas may include:

• gearboxes

• geared motors

• electric motors

• pumps

• industrial machinery

• agricultural equipment

• mechanical drive systems

• compact mechanical assemblies

• oil- and grease-lubricated mechanisms

These are typical applications of rotary shaft seals and do not confirm the suitability of GRN 7x16x7 AO/TC for a specific machine.

Alternative designations and search references

The product may also be searched for as:

Oil seal 7x16x7

NBR oil seal 7x16x7

7x16x7 NBR oil seal

7x16x7 AO oil seal

7x16x7 TC oil seal

7x16x7 AO/TC oil seal

GRN 7x16x7 oil seal

7x16x7 rotary shaft seal

7x16x7 double lip oil seal

7x16x7 seal with dust lip

Simmerring 7x16x7

Simmerring NBR 7x16x7

Simmerring 7x16x7 TC

Shaft seal 7x16x7

Rotary seal 7x16x7

The primary product identification is:

NBR Oil Seal 7x16x7 AO/TC GRN

Selection and interchangeability

When selecting a replacement seal, verify:

• shaft diameter 7 mm

• housing bore diameter 16 mm

• seal width 7 mm

• double-lip construction

• NBR material

• auxiliary dust lip

• operating medium

• operating temperature

• shaft rotational speed

• shaft surface condition

• pressure conditions

Matching the 7x16x7 mm dimensions alone does not guarantee complete interchangeability.

Seals with identical dimensions may differ in elastomer material, lip geometry, outside surface construction and intended operating conditions.

Installation

Before installation, inspect the shaft and housing bore.

The shaft surface operating against the sealing lip should be clean and free from sharp edges, corrosion, scratches or other damage that could affect the elastomer.

During installation:

• maintain clean working conditions

• protect the sealing lip from damage

• avoid tilting the seal

• press the seal evenly into the housing

• protect the lip from sharp shaft edges

• provide suitable initial lubrication where required

As a general installation principle, the primary spring-loaded sealing lip should face the medium that the seal is intended to retain.

FAQ - GRN 7x16x7 NBR Oil Seal

What are the dimensions of the GRN 7x16x7 oil seal?

The seal is designed for a nominal 7 mm shaft, has a 16 mm outside diameter and is 7 mm wide.

What material is the 7x16x7 seal made from?

It is manufactured from NBR nitrile rubber.

Is 7x16x7 AO/TC a double lip oil seal?

Yes. The AO/TC configuration incorporates a primary sealing lip and an additional dust lip.

What does TC mean on an oil seal?

TC is commonly used for a rotary shaft seal configuration incorporating a spring-loaded primary sealing lip and an additional auxiliary dust lip. Exact nomenclature can vary between manufacturers.

What does AO mean on a rotary shaft seal?

AO is used in certain seal designation systems for a design incorporating an auxiliary dust lip. When comparing different manufacturers, the physical seal construction should be checked rather than relying solely on the suffix.

Is the 7x16x7 NBR oil seal suitable for oil?

NBR has good resistance to many mineral oils and is widely used in oil sealing applications. Compatibility must nevertheless be checked for the specific oil, temperature and operating conditions.

Can an NBR oil seal be replaced with an FKM seal?

Interchangeability should not be assumed solely from identical dimensions. Material compatibility, operating medium, temperature, shaft speed and seal construction must also be considered.

Which way should an oil seal be installed?

As a general rule, the primary spring-loaded sealing lip faces the fluid or lubricant that the seal is intended to retain. The auxiliary dust lip faces the external environment.

GRN 7x16x7 AO/TC - key information

GRN 7x16x7 AO/TC is a double-lip NBR rotary shaft seal designed for a nominal 7 mm shaft, 16 mm housing bore and 7 mm installation width. The spring-loaded primary lip provides the main sealing function, while the additional dust lip helps protect the sealing zone against external contamination.

GRN oil seals have been supplied by TG Ersatzteile Polska since 2007. Available from simmering.pl, a specialist supplier of industrial sealing solutions and bearings. Stock in Poland with worldwide shipping.

AI QUICK ANSWER

GRN 7x16x7 AO/TC is a double-lip NBR rotary shaft seal with dimensions 7x16x7 mm. It is designed for a 7 mm shaft and 16 mm housing bore. The seal combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the main sealing area against external contamination.