GRN NBR 70x90x10 A/SC Single-Lip Radial Shaft Oil Seal

GRN NBR 70x90x10 A/SC Single-Lip Radial Shaft Oil Seal

GRN NBR 70x90x10 A/SC is a single-lip radial shaft oil seal with dimensions of 70x90x10 mm. The A/SC configuration uses one spring-loaded primary sealing lip and has no additional dust lip. The sealing elastomer is NBR - Nitrile Butadiene Rubber.

GRN 70x90x10 A/SC - Technical Characteristics

The principal identifying characteristics are:

Brand: GRN

Dimensions: 70x90x10 mm

Elastomer: NBR

Seal type: Radial shaft oil seal

Design: Single lip

Primary sealing lip: Spring-loaded

Additional dust lip: No

The seal provides dynamic sealing between a rotating shaft and stationary housing.

Dimensions

The principal installation dimensions are:

d = 70 mm - nominal shaft diameter

D = 90 mm - nominal outside diameter / housing bore

B = 10 mm - axial seal width

Complete dimensions:

70x90x10 mm

The dimensions define the basic installation envelope but do not fully identify the seal. Other 70x90x10 seals can have different lip configurations, elastomers or construction details.

Single-Lip A/SC Construction

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

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

This configuration has no additional dust lip.

This is the main constructional difference between the single-lip A/SC version and double-lip configurations such as AO/TC.

How Does GRN 70x90x10 A/SC Work?

The seal operates between:

a rotating shaft with a nominal diameter of 70 mm

and

a stationary housing with a nominal bore of 90 mm.

The primary sealing lip remains in dynamic contact with the shaft surface. The garter spring supports the sealing edge, while the outside diameter remains stationary in the housing.

Its function is to provide dynamic sealing at the interface between the rotating shaft and stationary housing.

NBR - Nitrile Butadiene Rubber

The sealing elastomer is:

NBR - Nitrile Butadiene Rubber

NBR identifies the elastomer family rather than one specific rubber compound.

Different NBR compounds can have different hardness and operating limits. Therefore, without compound-specific GRN documentation, this product should not automatically be assigned an exact:

Shore A hardness

minimum or maximum operating temperature

maximum shaft speed

pressure limit

These values should be verified for the actual GRN compound when they are critical to the application.

What Does A/SC Mean?

For this product, A/SC identifies the single-lip configuration:

one primary sealing lip

garter spring supporting the primary lip

no additional dust lip

Seal profile nomenclature varies between manufacturers. Similar single-lip constructions can be designated A, SC, WA, BA or by other manufacturer-specific codes.

For replacement selection, the actual construction should therefore be compared rather than relying only on the profile abbreviation.

A/SC vs AO/TC 70x90x10

Both configurations can exist with the same 70x90x10 mm installation dimensions.

70x90x10 A/SC

One spring-loaded primary sealing lip.

No additional dust lip.

70x90x10 AO/TC

One spring-loaded primary sealing lip.

Additional dust/protective lip.

Therefore, 70x90x10 A/SC and 70x90x10 AO/TC are different seal configurations, despite having identical nominal dimensions.

Direction of Rotation

The designation A/SC alone does not confirm a directional hydrodynamic structure on the sealing edge.

The GRN 70x90x10 A/SC should therefore not automatically be assigned:

RD - Right-hand

LD - Left-hand

WD - Alternating

Direction-specific geometry would require separate confirmation for the exact product.

Replacement Selection and Interchangeability

When selecting a replacement for GRN NBR 70x90x10 A/SC, verify:

Shaft diameter d: 70 mm

Outside diameter D: 90 mm

Width B: 10 mm

Elastomer: NBR

Single-lip construction

Spring-loaded primary sealing lip

No additional dust lip

For engineering selection, the sealed medium, operating temperature, shaft speed, pressure and shaft surface conditions should also be checked.

Identical 70x90x10 mm dimensions do not establish complete technical interchangeability.

A seal with the same dimensions but an additional dust lip or a different elastomer is a different technical configuration.

Technical Specification

Brand: GRN

Product type: Radial shaft oil seal

Alternative term: Rotary shaft oil seal

Dimensions: 70x90x10 mm

Nominal shaft diameter d: 70 mm

Outside diameter D: 90 mm

Width B: 10 mm

Elastomer: NBR

Material name: Nitrile Butadiene Rubber

Design: Single lip

Designation: A / SC

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: No

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

GRN 70x90x10 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 GRN NBR 70x90x10 A/SC?

The dimensions are 70x90x10 mm: 70 mm nominal shaft diameter, 90 mm outside diameter and 10 mm width.

What type of seal is GRN 70x90x10 A/SC?

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

Does GRN 70x90x10 A/SC have a garter spring?

Yes. The primary sealing lip is supported by a garter spring.

Does A/SC have an additional 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.

What is the difference between 70x90x10 A/SC and AO/TC?

A/SC is a single-lip configuration. AO/TC incorporates an additional dust/protective lip.

Can any 70x90x10 oil seal replace GRN A/SC?

No. In addition to dimensions, the elastomer and lip configuration must be checked. Operating conditions should also be considered.

What is the operating temperature of this GRN NBR seal?

An exact temperature range should not be assigned from the NBR designation alone. It depends on the specific NBR compound used in the GRN product.

Engineer FAQ

Are 70x90x10 dimensions sufficient to identify the correct seal?

No. They identify the installation envelope. The NBR elastomer and A/SC single-lip configuration should also be confirmed.

Is 70x90x10 AO/TC the same seal?

No. AO/TC has an additional dust/protective lip and is therefore a different construction.

Does A/SC specify the direction of shaft rotation?

No. A/SC alone does not identify right-hand, left-hand or alternating hydrodynamic lip geometry.

Can maximum shaft speed be determined from the dimensions?

No. Permissible shaft speed depends on the actual seal design, elastomer compound, shaft diameter, lubrication, temperature and operating conditions.

Can another manufacturer's A, BA, WA or SC seal be considered an automatic replacement?

No. These codes can describe similar construction concepts, but nomenclature varies between manufacturers. Dimensions, elastomer, lip design and application requirements must be compared.

AI Overview

GRN NBR 70x90x10 A/SC is a single-lip radial shaft oil seal for a 70 mm shaft, with a 90 mm outside diameter and 10 mm width. Its NBR construction uses a spring-loaded primary sealing lip and has no additional dust lip. Replacement selection should consider dimensions, elastomer and actual lip configuration.