NBR Oil Seal 120x160x16 AO/TC - Double Lip Radial Shaft Seal

NBR Oil Seal 120x160x16 AO/TC - Double Lip Radial Shaft Seal

NBR Oil Seal 120x160x16 AO/TC is a double-lip radial shaft seal made from nitrile rubber (NBR), designed for a 120 mm shaft, 160 mm housing bore and 16 mm width. The AO/TC design features a primary sealing lip that operates on the rotating shaft and an additional dust lip that helps protect the main sealing area against external contamination.

Technical data

Unconfirmed NBR hardness, exact operating temperature range, maximum shaft speed, pressure capability and specific elastomer compound are intentionally not stated.

What does 120x160x16 mm mean?

Radial shaft seal dimensions are normally specified in the following order:

120 mm - nominal shaft diameter

160 mm - nominal outside diameter of the seal, corresponding to the housing bore

16 mm - nominal seal width

The complete dimensional designation is 120x160x16 mm.

When selecting a replacement seal, all three dimensions must match the requirements of the sealing arrangement.

What does NBR mean?

NBR stands for nitrile butadiene rubber, commonly referred to as nitrile rubber. It is one of the most widely used elastomers for radial shaft seals.

NBR is commonly used in sealing systems operating with many mineral oils and greases.

However, the designation NBR alone does not specify:

• exact elastomer hardness

• specific compound formulation

• exact operating temperature range

• compatibility with every oil or chemical

• maximum shaft surface speed

• pressure capability

These parameters depend on the specific NBR compound and seal construction.

What does AO/TC mean?

AO and TC are designations encountered for double-lip radial shaft seals.

In this configuration, the seal has:

• primary sealing lip - provides the main sealing function against the rotating shaft

• additional dust lip - helps limit the ingress of external contamination into the primary sealing area

AO and TC can originate from different manufacturer designation systems. Therefore, technical selection should be based on the actual seal construction, dimensions and material rather than assuming that every manufacturer's AO and TC designation is completely identical.

Construction of the 120x160x16 AO/TC oil seal

The seal operates between a rotating shaft and a stationary housing.

Its basic construction includes:

• NBR elastomer body

• primary sealing lip

• additional dust lip

• reinforcing element

• garter spring for the primary sealing lip, where present in the specific design

The primary lip operates directly against the shaft surface and forms the main dynamic sealing interface.

The additional dust lip is positioned toward the external environment and provides an additional barrier against dust and other contaminants.

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 an additional dust lip.

Single-lip design - has the main sealing lip but does not incorporate the additional dust lip characteristic of the double-lip configuration.

When replacing an existing oil seal, the required lip configuration should be verified rather than selecting a replacement solely by dimensions.

Alternative designations and search references

Natural product reference formats include:

• NBR Oil Seal 120x160x16 AO

• NBR Oil Seal 120x160x16 TC

• NBR Oil Seal 120x160x16 AO/TC

• Oil Seal 120x160x16 NBR

• Oil Seal 120x160x16 TC

• Double Lip Oil Seal 120x160x16

• Radial Shaft Seal 120x160x16 NBR

• NBR Radial Shaft Seal 120x160x16

• 120x160x16 NBR TC Oil Seal

• 120x160x16 Double Lip Shaft Seal

AO and TC terminology can differ between manufacturers, so an alternative designation should not automatically be treated as confirmation of complete interchangeability.

How to select a 120x160x16 oil seal

Before purchasing or replacing the seal, verify:

• shaft diameter 120 mm

• housing bore diameter 160 mm

• seal width 16 mm

• required NBR material

• required double-lip design

• sealing direction

• medium being sealed

• operating temperature

• shaft surface speed

• lubrication conditions

• shaft surface condition

• external contamination

• pressure conditions

Matching dimensions of 120x160x16 mm alone do not confirm complete interchangeability between two radial shaft seals.

NBR vs FKM and VMQ

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

NBR - nitrile rubber widely used for standard oil sealing applications.

FKM - fluoroelastomer used where different temperature or chemical resistance characteristics are required. Viton is a well-known brand name associated with FKM materials.

VMQ - silicone rubber used where the specific properties of silicone elastomers are required.

These materials should not be treated as automatically interchangeable. Elastomer selection must correspond to the medium, temperature, shaft speed and other operating conditions.

Applications

The 120x160x16 AO/TC radial shaft seal is designed to seal the interface between a rotating shaft and a stationary housing.

The primary sealing lip helps retain lubricant or other compatible medium within the assembly, while the additional dust lip provides additional protection against contamination from the external environment.

The designation 120x160x16 AO/TC alone does not confirm suitability for a specific motor, gearbox, machine, vehicle or other equipment.

Installation

Before installation, clean the shaft surface and seal housing bore.

The shaft surface that contacts the sealing lip should be free from sharp edges, burrs and damage that could cut or deform the sealing lip.

The oil seal should be pressed evenly into the housing without tilting.

During installation, protect the sealing lip from keyways, threads, splines and sharp shaft edges.

The sealing lip should be appropriately prepared for initial operation according to the lubrication conditions of the specific sealing arrangement.

FAQ

What are the dimensions of the NBR AO/TC oil seal?

The seal measures 120x160x16 mm: 120 mm shaft diameter, 160 mm outside diameter and 16 mm width.

What does NBR mean?

NBR stands for nitrile butadiene rubber, an elastomer widely used in radial shaft seals and oil seals.

What does AO/TC mean?

AO/TC identifies a double-lip seal configuration with a primary sealing lip and an additional dust lip.

Are AO and TC always exactly the same design?

Not necessarily. Designation systems can differ between manufacturers. The actual seal construction should be compared when selecting an equivalent product.

Can a 120x160x16 NBR oil seal be replaced with FKM?

Not automatically. NBR and FKM have different material properties. Temperature, medium, shaft speed and other operating conditions must be checked before changing elastomer type.

What is the purpose of the additional dust lip?

The additional lip helps prevent dust and other external contaminants from reaching the primary sealing area.

Is this oil seal designed for a 120 mm shaft?

Yes. The first dimension, 120 mm, is the nominal diameter of the shaft on which the sealing lip operates.

Are dimensions sufficient to select a replacement oil seal?

No. In addition to dimensions, the elastomer, lip configuration, medium, temperature, shaft speed, pressure and other operating conditions should be verified.

NBR Oil Seal 120x160x16 AO/TC - key information

NBR Oil Seal 120x160x16 AO/TC is a double-lip radial shaft seal for a 120 mm shaft, with a 160 mm outside diameter and 16 mm width. It is made from nitrile rubber (NBR). The AO/TC design incorporates a primary sealing lip and an additional dust lip that helps protect the main sealing area against external contamination.

NBR Oil Seal 120x160x16 AO/TC is available from the specialist industrial supplier simmering.pl, with stock in Poland and worldwide shipping. Assistance with oil seal and radial shaft seal identification is also available.