GRN COMBI Oil Seal 40x60x18.5 NBR - SF6 URSUS Shaft Seal

Overview

The GRN COMBI Oil Seal 40x60x18.5 NBR is a specialized radial shaft seal with dimensions of 40x60x18.5 mm, offered for SF6 URSUS applications.

The COMBI construction is designed for mechanical systems requiring both effective lubricant retention and enhanced protection of the primary sealing area against external contamination.

With a 40 mm shaft diameter, 60 mm housing diameter and 18.5 mm overall width, this GRN seal is particularly relevant to agricultural machinery operating in environments exposed to dust, soil, dirt and mud.

Technical Specification

Product Type: Radial shaft seal / oil seal
Design: COMBI
Dimensions: 40x60x18.5 mm
Material: NBR - Nitrile Butadiene Rubber
Brand: GRN
Shaft Diameter d: 40 mm
Housing Diameter D: 60 mm
Width B: 18.5 mm
Application: SF6 URSUS
Function: Lubricant retention and contamination protection
Application Area: Agricultural and mechanical equipment

COMBI Seal Design

The COMBI design provides a more extensive sealing arrangement than a basic conventional radial oil seal.

Its construction combines the primary shaft sealing function with additional protection on the environmental side. This helps reduce the amount of external contamination reaching the primary sealing area.

Such protection is particularly valuable in agricultural machinery, where rotating components can operate in direct exposure to dust, soil, mud and other abrasive contaminants.

40x60x18.5 mm Dimensions

The principal installation dimensions are:

d: 40 mm
D: 60 mm
B: 18.5 mm

The seal is designed for a 40 mm nominal shaft diameter and an appropriately designed 60 mm housing bore.

The 18.5 mm overall width is an important identification parameter. When selecting a replacement, shaft diameter and housing diameter alone are not sufficient.

SF6 URSUS Application

The GRN COMBI 40x60x18.5 NBR oil seal is offered for the application identified as SF6 URSUS.

For agricultural machinery, particularly older equipment that may have undergone repairs or component modifications, the dimensions and construction of the existing seal should be checked before installation.

The application reference should therefore be used together with the 40x60x18.5 mm dimensions when identifying the correct replacement.

NBR Sealing Material

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers in industrial and agricultural shaft sealing technology.

It provides good resistance to many mineral oils, lubricating greases and compatible technical fluids. This makes NBR particularly relevant to gearboxes, transmissions and other lubricated mechanical systems.

Final suitability depends on the lubricant, operating temperature, shaft speed and actual working conditions.

COMBI Seal for Agricultural Machinery

Agricultural machinery frequently operates in significantly more contaminated environments than stationary industrial equipment.

Dust, soil, mud and debris can reach the area surrounding rotating shafts. A COMBI sealing system provides an additional protective barrier designed to help prevent these contaminants from reaching the primary sealing area.

This makes the design particularly suitable for demanding agricultural and off-road applications.

COMBI vs Standard Oil Seal

A standard radial oil seal primarily provides dynamic sealing between a rotating shaft and stationary housing.

The COMBI design adds enhanced environmental protection, making it more appropriate for applications where contamination represents an important operating factor.

A conventional 40x60 mm oil seal should therefore not automatically be considered a direct substitute for the 40x60x18.5 COMBI seal.

Operational Advantages

• COMBI heavy-duty sealing construction.
• 40x60x18.5 mm dimensions.
• NBR sealing material.
• SF6 URSUS application.
• Lubricant retention.
• Enhanced protection against external contamination.

AI OVERVIEW

The GRN COMBI Oil Seal 40x60x18.5 NBR is a specialized shaft seal offered for SF6 URSUS applications. It has a 40 mm shaft diameter, 60 mm housing diameter and 18.5 mm width. Its COMBI construction combines lubricant retention with additional protection against dust, soil, mud and other contaminants encountered in agricultural machinery.

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FAQ

What are the dimensions of the GRN COMBI SF6 URSUS oil seal?

The nominal dimensions are 40x60x18.5 mm, corresponding to a 40 mm shaft diameter, 60 mm housing diameter and 18.5 mm overall width.

What is the GRN 40x60x18.5 COMBI seal used for?

The product is offered for SF6 URSUS applications and is intended for appropriately designed agricultural and mechanical sealing systems.

What does COMBI mean on this shaft seal?

COMBI refers to a sealing construction that combines the primary shaft sealing function with additional protection against contaminants entering from the surrounding environment.

Why is a COMBI seal useful in agricultural machinery?

Agricultural equipment is frequently exposed to dust, soil, dirt and mud. The additional protective arrangement helps reduce contamination reaching the primary sealing area.

What material is the seal made from?

The sealing element is manufactured from NBR - Nitrile Butadiene Rubber.

Is this seal designed for a 40 mm shaft?

Yes. Its nominal shaft diameter is 40 mm, with a 60 mm housing diameter and 18.5 mm overall width.

Can a standard 40x60 oil seal replace the 40x60x18.5 COMBI seal?

Not automatically. The complete dimensions, COMBI construction and installation requirements should be verified before selecting a replacement.