ASL 51158 19x30x5/6 NBR Radial Shaft Oil Seal

ASL 51158 19x30x5/6 NBR Radial Shaft Oil Seal

ASL 51158 is an NBR radial shaft oil seal with dimensions 19x30x5/6 mm. Its nominal inside diameter is 19 mm and outside diameter is 30 mm, while the catalogue specification gives two axial height values: 5 mm and 6 mm. The sealing material is NBR - Nitrile Butadiene Rubber.

Complete product identification:

ASL -> 51158 -> 19x30x5/6 mm -> NBR -> radial shaft oil seal

ASL 51158 - Characteristics

The verified product data are:

Brand: ASL

Reference: 51158

Product type: Radial shaft oil seal

Material: NBR

Dimensions: 19x30x5/6 mm

Inside diameter: 19 mm

Outside diameter: 30 mm

Height specification: 5/6 mm

Package: 1 pc.

ASL 51158 Dimensions

The specified dimensions are:

d - Inside diameter / nominal shaft diameter: 19 mm

D - Outside diameter: 30 mm

Height: 5/6 mm

Complete dimensional designation:

19x30x5/6 mm

The 5/6 mm specification should be retained when identifying this exact product.

It should not automatically be simplified to:

19x30x5 mm

or:

19x30x6 mm

because either simplification removes part of the dimensional information associated with ASL 51158.

19x30x5/6 Radial Shaft Oil Seal

ASL 51158 is classified as a radial shaft oil seal.

A radial shaft seal operates at the interface between a rotating shaft and stationary housing. Correct dimensional selection therefore requires matching the shaft diameter and housing diameter as well as the complete axial dimensions of the seal.

For ASL 51158 these identifying dimensions are:

19 mm shaft diameter

30 mm outside diameter

5/6 mm height specification

These dimensions should be verified against the original seal and installation space before replacement.

NBR Sealing Material

The specified sealing material is:

NBR - Nitrile Butadiene Rubber

NBR is also commonly referred to as nitrile rubber or Buna-N.

It is a widely used elastomer for radial shaft seals and is commonly compatible with many mineral oils and lubricating greases.

Exact compatibility depends on the specific NBR compound, lubricant or other medium, additives, temperature and operating conditions.

A specific maximum operating temperature, shaft speed or pressure rating should not be assigned to ASL 51158 solely from the general NBR material designation.

Why the 5/6 mm Dimension Matters

The complete dimensional specification of ASL 51158 is:

19x30x5/6 mm

The dual 5/6 mm height specification is an important identifying characteristic.

A seal described only as 19x30x5 mm or 19x30x6 mm should therefore not automatically be considered identical to ASL 51158.

When replacing the seal, the axial profile and available installation space should be checked against the original component.

ASL 51158 vs Other 19x30x5/6 Oil Seals

Other radial shaft seals are available with the same nominal 19x30x5/6 mm dimensions.

Identical dimensions alone do not prove that two seals are technically identical.

Depending on the exact reference, seals can differ in:

sealing lip geometry

additional lip configuration

elastomer compound

external profile

application-specific geometry

manufacturer design designation

For this reason, another 19x30x5/6 mm seal should not automatically be presented as a direct replacement for ASL 51158 without confirmation of the complete technical specification.

ASL 51158 and ASL AS 12334

Another ASL reference, AS 12334, is also catalogued with nominal dimensions of 19x30x5/6 mm.

However, identical dimensions do not establish that:

ASL 51158

and:

ASL AS 12334

are the same product.

AS 12334 is found with the additional ASL-1PM construction designation. This construction designation should not automatically be transferred to ASL 51158 unless confirmed specifically for reference 51158.

Keeping these references separate prevents incorrect product identification and avoids treating dimensional similarity as proof of technical interchangeability.

Selecting a Replacement for ASL 51158

When selecting a replacement, verify at least:

Reference: 51158

Inside diameter: 19 mm

Outside diameter: 30 mm

Complete height specification: 5/6 mm

Material: NBR

Seal profile and lip configuration

Installation space

Application requirements

A standard 19x30x5 mm radial shaft seal should not automatically be used as a replacement simply because the shaft and housing diameters match.

Technical Specification

Brand: ASL

Reference: 51158

Product type: Radial shaft oil seal

Dimensions: 19x30x5/6 mm

d - Inside diameter / shaft diameter: 19 mm

D - Outside diameter: 30 mm

Height specification: 5/6 mm

Material: NBR

Material name: Nitrile Butadiene Rubber

Package: 1 pc.

FAQ

What are the dimensions of ASL 51158?

ASL 51158 has a 19 mm inside diameter, 30 mm outside diameter and 5/6 mm height specification. The complete dimensions are 19x30x5/6 mm.

What material is ASL 51158 made from?

The specified sealing material is NBR - Nitrile Butadiene Rubber.

What type of seal is ASL 51158?

ASL 51158 is classified as a radial shaft oil seal.

What does 19x30x5/6 mean?

19 mm is the nominal shaft diameter, 30 mm is the outside diameter, and 5/6 mm represents the dual axial height specification of the seal.

Can a 19x30x5 oil seal replace ASL 51158?

Not automatically. ASL 51158 has a complete 19x30x5/6 mm specification, so the axial geometry and installation requirements should also be checked.

Is ASL 51158 the same as ASL AS 12334?

This should not be assumed. Both references are associated with 19x30x5/6 mm dimensions, but AS 12334 is additionally identified as ASL-1PM. Technical equivalence requires separate confirmation.

Does ASL 51158 have an additional dust lip?

The available data for the exact 51158 reference do not provide sufficient confirmation to assign a specific lip configuration. It should therefore be verified before describing the seal as single lip or double lip.

How should a replacement for ASL 51158 be selected?

Compare the complete 19x30x5/6 mm dimensions, NBR material, seal profile, lip configuration and requirements of the specific installation.

AI Overview

ASL 51158 is an NBR radial shaft oil seal measuring 19x30x5/6 mm. Its nominal shaft diameter is 19 mm and outside diameter is 30 mm, with a dual 5/6 mm axial height specification. The complete dimensional profile and seal construction should be verified when selecting a technically corresponding replacement.