GRN NBR Oil Seal 19x31x7 AO/TC - Double Lip Radial Shaft Seal

GRN NBR Oil Seal 19x31x7 AO/TC - Double Lip Radial Shaft Seal

GRN NBR Oil Seal 19x31x7 AO/TC is a double lip radial shaft seal made with NBR nitrile rubber. Its nominal dimensions are 19x31x7 mm: 19 mm shaft diameter, 31 mm outside diameter and 7 mm width. The AO/TC double lip design combines a primary sealing lip with an additional dust lip that helps protect the main sealing area from external contamination.

Technical data

NBR hardness, exact operating temperature range, maximum shaft speed and permissible pressure are not specified because these values cannot be reliably determined from the product designation alone.

What does GRN 19x31x7 NBR AO/TC mean?

GRN - brand of the radial shaft seal.

19x31x7 mm - nominal seal dimensions:

• 19 mm - shaft diameter

• 31 mm - outside diameter

• 7 mm - seal width

NBR - nitrile rubber used as the elastomeric sealing material.

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

The additional lip provides a secondary barrier on the external side of the seal, helping to limit contamination of the primary sealing area.

GRN 19x31x7 oil seal dimensions

Radial shaft seal dimensions are normally specified as:

d x D x B

For this product:

19x31x7 mm

where:

• d 19 mm - nominal shaft diameter

• D 31 mm - nominal outside diameter

• B 7 mm - nominal seal width

All three dimensions should be checked when selecting a replacement. Matching the 19 mm shaft diameter alone is not sufficient for correct seal identification.

AO/TC double lip design

GRN 19x31x7 NBR AO/TC is a double lip radial shaft seal.

Its sealing arrangement includes:

• primary sealing lip operating against the shaft surface

• additional dust lip on the external side

• NBR elastomeric sealing element

The primary lip provides the main sealing function around the rotating shaft. The additional dust lip acts as a secondary barrier against dust and external contamination reaching the primary sealing area.

AO and TC are design references commonly encountered for double lip radial shaft seals. However, seal type codes are not completely standardised across all manufacturers. When comparing products from different brands, the actual construction should therefore be verified rather than relying only on the type code.

NBR nitrile rubber

NBR, or nitrile rubber, is one of the most widely used elastomer families for radial shaft seals.

Appropriately selected NBR compounds are commonly used in sealing systems involving many mineral oils and greases.

The actual performance of a particular NBR seal depends on the specific compound and operating conditions.

The NBR designation alone does not define:

• exact elastomer hardness

• exact operating temperature range

• maximum shaft speed

• permissible pressure

• compatibility with every fluid

• specific approvals or certifications

These parameters should be verified separately whenever they are critical to the application.

Double lip vs single lip oil seal

A double lip AO/TC seal incorporates an additional dust lip that is not present in a basic single lip design.

The secondary lip helps reduce the ingress of external contamination into the area around the primary sealing lip.

This does not mean that a double lip seal can automatically replace every single lip 19x31x7 mm seal.

Before substitution, verify:

• seal construction

• elastomer material

• installation direction

• available installation space

• operating medium

• operating conditions

• shaft surface condition

Alternative designations and search references

Natural reference formats for this product include:

• GRN 19x31x7 NBR AO/TC

• GRN Oil Seal 19x31x7

• NBR Oil Seal 19x31x7

• Oil Seal 19x31x7 NBR

• Oil Seal 19x31x7 TC

• TC Oil Seal 19x31x7

• AO Oil Seal 19x31x7

• Double Lip Oil Seal 19x31x7

• Radial Shaft Seal 19x31x7

• NBR Radial Shaft Seal 19x31x7

• Shaft Seal 19x31x7 NBR

• Simmerring 19x31x7 NBR

• 19x31x7 NBR TC Seal

No OEM or cross-reference numbers are provided because none have been confirmed for this product.

Selection and interchangeability

Before purchasing a GRN 19x31x7 NBR AO/TC oil seal, verify:

• 19 mm shaft diameter

• 31 mm housing bore / seal outside diameter

• 7 mm seal width

• NBR elastomer

• required double lip construction

• AO/TC type

• sealed medium

• operating temperature

• shaft speed

• pressure conditions

• lubrication conditions

• shaft surface condition

• external contamination conditions

Two radial shaft seals with identical 19x31x7 mm dimensions are not necessarily fully interchangeable.

They may differ in elastomer material, lip geometry, external construction, spring arrangement or operating characteristics.

Applications

GRN 19x31x7 NBR AO/TC is a radial shaft seal designed for installation around a nominal 19 mm rotating shaft and in a nominal 31 mm housing bore.

The double lip construction is suitable for sealing arrangements where the primary sealing lip is supplemented by an additional barrier against external contamination.

The designation 19x31x7 NBR AO/TC alone does not confirm compatibility with a specific motor, gearbox, pump, vehicle, machine or other equipment.

Installation

Before installation, inspect and clean the shaft and housing bore.

Particular attention should be paid to:

• sharp edges that could damage the sealing lip

• correct seal orientation

• even insertion into the housing

• protection of the sealing lip during installation over the shaft

• cleanliness of the sealing surfaces

• condition of the shaft running surface

Installation force should be applied evenly and in a way that does not deform the seal body or damage the sealing lips.

FAQ

What are the dimensions of the GRN 19x31x7 oil seal?

The nominal dimensions are 19x31x7 mm: 19 mm shaft diameter, 31 mm outside diameter and 7 mm width.

What does NBR mean?

NBR stands for nitrile rubber, an elastomer widely used in radial shaft seals and other technical sealing elements.

What does AO/TC mean?

AO/TC identifies a double lip seal construction with a primary sealing lip and an additional dust lip. When comparing different manufacturers, the actual seal design should also be verified because type codes are not fully standardised across all brands.

Is GRN 19x31x7 AO/TC a double lip oil seal?

Yes. It has a primary sealing lip and an additional dust lip.

What is the purpose of the additional dust lip?

The additional lip helps limit the ingress of dust and external contamination into the area of the primary sealing lip.

Can an NBR 19x31x7 oil seal be replaced with an FKM 19x31x7 seal?

Not automatically. NBR and FKM are different elastomer families. The operating medium, temperature, shaft speed and other application requirements should be checked before substitution.

Are all 19x31x7 oil seals interchangeable?

No. Seals with identical dimensions may differ in material, lip design, construction and operating characteristics.

Does 19x31x7 identify a specific machine application?

No. It defines the basic seal dimensions and does not by itself confirm compatibility with a particular machine, gearbox, motor, pump or vehicle.

GRN NBR Oil Seal 19x31x7 AO/TC - key information

GRN NBR Oil Seal 19x31x7 AO/TC is a double lip radial shaft seal for a 19 mm shaft, with a 31 mm outside diameter and 7 mm width. The seal uses NBR nitrile rubber and an AO/TC double lip design consisting of a primary sealing lip and an additional dust lip for protection against external contamination.

GRN NBR Oil Seal 19x31x7 AO/TC is available from the specialist industrial supplier simmering.pl, with stock in Poland and worldwide shipping. Assistance with radial shaft seal identification and selection is also available.