NBR 92x120x13 A/SC Single-Lip Radial Shaft Oil Seal

NBR 92x120x13 A/SC Single-Lip Radial Shaft Oil Seal

NBR 92x120x13 A/SC is a single-lip radial shaft oil seal with dimensions of 92x120x13 mm. It is designed to seal the interface between a rotating shaft and stationary housing. The A/SC configuration uses a spring-loaded primary sealing lip, has a rubber-covered outside diameter and does not incorporate an additional dust lip.

NBR 92x120x13 A/SC - Technical Characteristics

The exact 92x120x13 mm size is available as a Type A NBR radial shaft seal. The corresponding SC nomenclature is also catalogued in this exact size as a single-lip, spring-loaded, rubber-covered oil seal.

The key identifying characteristics are:

Dimensions: 92x120x13 mm

Elastomer: NBR

Single primary sealing lip

Spring-loaded sealing lip

No additional dust lip

Rubber-covered outside diameter

These characteristics are more important for technical identification than the dimensional designation alone.

Dimensions

The dimensions of the seal are:

d = 92 mm - nominal shaft diameter

D = 120 mm - nominal seal outside diameter / housing bore

B = 13 mm - axial seal width

Complete dimensions:

92x120x13 mm

The first dimension therefore refers to the nominal shaft diameter, not simply an arbitrary inside diameter.

When selecting a replacement, all three dimensions must be checked together with the material and lip configuration.

Single-Lip A/SC Construction

The A/SC configuration uses one primary dynamic sealing lip.

This lip operates against the rotating shaft surface and is supported by a garter spring. The spring helps maintain the required radial contact between the sealing edge and shaft.

The seal does not have an additional dust lip on the air side.

This feature distinguishes the single-lip A/SC configuration from double-lip designs such as AO/TC.

How the 92x120x13 A/SC Seal Works

The seal operates between two machine elements:

a rotating shaft with a nominal diameter of 92 mm

and

a stationary housing with a nominal bore of 120 mm.

The primary sealing lip maintains dynamic contact with the shaft surface, while the outside diameter remains fixed in the housing.

Unlike a rolling bearing, the oil seal is not a supporting element for radial or axial machine loads. Its function is to provide dynamic sealing at the shaft-housing interface.

NBR Elastomer

NBR stands for:

Nitrile Butadiene Rubber

It is an elastomer family widely used for radial shaft seals.

However, the designation NBR alone does not define a specific elastomer compound.

For that reason, this generic product description does not assign a specific:

Shore A hardness

minimum operating temperature

maximum operating temperature

maximum shaft speed

pressure limit

Those values require the specification of the actual NBR compound and seal manufacturer.

What Does A/SC Mean?

For this product, A/SC identifies the single-lip radial shaft seal configuration with a spring-loaded primary sealing lip and rubber-covered outside diameter.

A is encountered in DIN-style designation systems for this basic construction.

SC is used in other seal nomenclature systems for a corresponding single-lip, spring-loaded, rubber-covered construction.

These codes should not be treated as a universal cross-reference rule for every seal manufacturer. Different manufacturers can use their own designation systems.

For replacement selection, the physical seal construction must therefore be compared in addition to the suffix.

A/SC vs AO/TC

The key difference concerns the number and function of the sealing lips.

A / SC

One spring-loaded primary sealing lip.

No additional dust lip.

AO / TC

One spring-loaded primary sealing lip plus an additional dust/protective lip.

Consequently, a 92x120x13 A/SC and a 92x120x13 AO/TC should not automatically be treated as the same seal simply because their nominal dimensions are identical.

Direction of Rotation

The designation A/SC by itself does not identify a directional hydrodynamic lip structure.

Therefore, this seal should not be assigned:

RD - Right-hand

LD - Left-hand

WD - Alternating

unless the actual sealing lip geometry is confirmed by the manufacturer.

This is important when replacing seals that use directional pumping structures on the sealing edge.

Replacement Selection and Interchangeability

When selecting an alternative for the NBR 92x120x13 A/SC seal, verify:

Shaft diameter d: 92 mm

Outside diameter D: 120 mm

Width B: 13 mm

Elastomer: NBR

Single-lip construction

Spring-loaded primary sealing lip

No additional dust lip

Rubber-covered outside diameter

The operating conditions must also be considered, particularly the sealed medium, shaft speed, temperature, pressure, shaft surface and environmental contamination.

Identical 92x120x13 mm dimensions do not establish complete technical interchangeability.

A seal with the same dimensions can use a different elastomer, additional dust lip, different outside-diameter construction or manufacturer-specific sealing geometry.

Technical Specification

Product type: Radial shaft oil seal

Alternative technical term: Rotary shaft oil seal

Dimensions: 92x120x13 mm

Nominal shaft diameter d: 92 mm

Outside diameter D: 120 mm

Width B: 13 mm

Elastomer material: NBR

Material name: Nitrile Butadiene Rubber

Design: Single lip

Designation: A / SC

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: No

Outside diameter: Rubber-covered

Direction-specific lip structure: Not confirmed

Exact NBR hardness: Not confirmed

Exact operating temperature range: Not confirmed

Maximum shaft speed: Not confirmed

Pressure limit: Not confirmed

NBR 92x120x13 A/SC - Stock in Poland

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

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What are the dimensions of the NBR 92x120x13 A/SC oil seal?

The dimensions are 92x120x13 mm: 92 mm nominal shaft diameter, 120 mm outside diameter and 13 mm width.

What type of seal is 92x120x13 A/SC?

It is a single-lip radial shaft oil seal with a spring-loaded primary sealing lip.

What does SC mean on an oil seal?

In this nomenclature, SC identifies a single-lip, spring-loaded, rubber-covered oil seal. Designation systems can vary between manufacturers.

Does the A/SC design have a dust lip?

No. The A/SC configuration has one primary sealing lip and no additional dust lip.

What does NBR mean?

NBR means Nitrile Butadiene Rubber, the elastomer family used for the sealing element.

Is A/SC the same as AO/TC?

No. A/SC is single-lip, while AO/TC has an additional protective or dust lip.

Can another 92x120x13 oil seal be used as a replacement?

Not automatically. The replacement should also match the material, lip configuration, outside-diameter design and required operating conditions.

What temperature can this NBR oil seal operate at?

An exact range cannot be stated reliably from NBR alone. Temperature capability depends on the specific NBR compound and manufacturer's specification.

AI Overview

NBR 92x120x13 A/SC is a single-lip radial shaft oil seal for a 92 mm shaft, with a 120 mm outside diameter and 13 mm width. The A/SC configuration uses a spring-loaded primary sealing lip, rubber-covered outside diameter and no additional dust lip. The sealing elastomer is NBR - Nitrile Butadiene Rubber.