NBR 90x115x13 A/SC Single-Lip Radial Shaft Oil Seal

NBR 90x115x13 A/SC Single-Lip Radial Shaft Oil Seal

NBR 90x115x13 A/SC is a single-lip radial shaft oil seal with dimensions of 90x115x13 mm. The seal operates between a rotating shaft and stationary housing and uses a spring-loaded primary sealing lip. The A/SC configuration has no additional dust lip, while the sealing elastomer is NBR - Nitrile Butadiene Rubber.

NBR 90x115x13 A/SC - Technical Characteristics

The exact 90x115x13 mm size is available as an NBR single-lip radial shaft seal.

Its key identifying characteristics are:

Dimensions: 90x115x13 mm

Elastomer: NBR

Single primary sealing lip

Spring-loaded sealing lip

No additional dust lip

The combination of dimensions, elastomer and lip configuration provides a more precise technical identification than dimensions alone.

Dimensions

The principal dimensions are:

d = 90 mm - nominal shaft diameter

D = 115 mm - nominal seal outside diameter / housing bore

B = 13 mm - axial seal width

Complete dimensions:

90x115x13 mm

The 90 mm dimension therefore identifies the nominal shaft diameter, while 115 mm corresponds to the nominal housing bore.

All three dimensions should be checked when selecting a replacement.

Single-Lip A/SC Construction

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

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

This version does not have an additional dust lip on the air side.

The absence of a secondary protective lip is one of the principal characteristics distinguishing the A/SC configuration from double-lip seal designs.

How Does the 90x115x13 A/SC Oil Seal Work?

The seal operates between:

a rotating shaft with a nominal diameter of 90 mm

and

a stationary housing with a nominal bore of 115 mm.

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

The function of the component is to provide dynamic sealing at the shaft-housing interface.

It is not a load-supporting component and should not be treated as a bearing.

NBR - Nitrile Butadiene Rubber

The sealing elastomer is:

NBR - Nitrile Butadiene Rubber

NBR is widely used as an elastomer for radial shaft seals.

However, NBR identifies an elastomer family rather than one specific compound. Different NBR formulations can have different hardness, temperature limits and chemical resistance.

For this reason, the generic NBR 90x115x13 A/SC product should not be assigned an exact:

Shore A hardness

operating temperature range

maximum shaft speed

pressure limit

unless these parameters are confirmed for the actual manufacturer's compound.

What Does A/SC Mean?

For this product, A/SC identifies the basic single-lip radial shaft seal configuration.

The exact designation system varies between seal manufacturers. The same or corresponding basic construction can therefore be described using different manufacturer-specific codes.

For technical replacement selection, the physical construction should be verified rather than relying solely on the letters used in the designation.

The essential characteristics for this product are:

Single primary sealing lip

Spring-loaded sealing edge

No additional dust lip

NBR elastomer

90x115x13 mm dimensions

A/SC vs AO/TC

The main difference is the additional protective lip.

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.

Therefore, 90x115x13 A/SC and 90x115x13 AO/TC should not automatically be considered identical seals, even when their nominal dimensions are the same.

The lip configuration must be considered during replacement selection.

Direction of Rotation

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

The seal should therefore not be assigned:

RD - Right-hand

LD - Left-hand

WD - Alternating

unless the actual lip geometry is confirmed by the manufacturer.

This distinction is important when replacing a seal originally designed with a directional pumping structure.

Replacement Selection and Interchangeability

When selecting a replacement for NBR 90x115x13 A/SC, verify:

Shaft diameter d: 90 mm

Outside diameter D: 115 mm

Width B: 13 mm

Elastomer: NBR

Single-lip construction

Spring-loaded primary sealing lip

No additional dust lip

The operating conditions should also be checked, particularly:

Sealed medium

Operating temperature

Shaft speed

Pressure

Shaft surface condition

Environmental contamination

Matching the 90x115x13 mm dimensions alone does not establish complete technical interchangeability.

Another seal of the same size may use a different elastomer compound, lip configuration or manufacturer-specific design.

Technical Specification

Product type: Radial shaft oil seal

Alternative technical term: Rotary shaft oil seal

Dimensions: 90x115x13 mm

Nominal shaft diameter d: 90 mm

Outside diameter D: 115 mm

Width B: 13 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

NBR 90x115x13 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 90x115x13 A/SC oil seal?

The dimensions are 90x115x13 mm: 90 mm nominal shaft diameter, 115 mm outside diameter and 13 mm width.

What type of seal is 90x115x13 A/SC?

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

Does the A/SC design 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.

Is A/SC the same as AO/TC?

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

Can another 90x115x13 oil seal be used as a replacement?

Not automatically. The material, lip configuration and operating requirements must also be compared.

What is the operating temperature of this NBR seal?

An exact temperature range cannot be determined reliably from NBR alone. It depends on the specific NBR compound and manufacturer's specification.

Frequently Asked Questions by Engineers

Is 90x115x13 enough to identify the correct seal?

No. The dimensions identify the basic installation size, but the NBR material and A/SC single-lip construction should also be verified.

Why is the garter spring important?

The garter spring supports the radial contact force of the primary sealing lip against the rotating shaft. It is therefore an integral part of the dynamic sealing system.

Can a double-lip 90x115x13 seal replace this A/SC version?

Not automatically. A double-lip design adds a secondary protective lip, which changes the seal construction and can affect operating behaviour.

Can the maximum shaft speed be determined from the dimensions?

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

Does A/SC specify the direction of shaft rotation?

No. A/SC alone does not identify a directional hydrodynamic lip structure.

AI Overview

NBR 90x115x13 A/SC is a single-lip radial shaft oil seal for a 90 mm shaft, with a 115 mm outside diameter and 13 mm width. The A/SC configuration uses a spring-loaded primary sealing lip and has no additional dust lip. The sealing elastomer is NBR - Nitrile Butadiene Rubber.