X-Ring 66.04x5.33 NBR 70 Shore A Four-Lobed Seal

X-Ring 66.04x5.33 NBR 70 Shore A Four-Lobed Seal

X-Ring 66.04x5.33 NBR 70 Shore A is an elastomeric sealing ring with a characteristic four-lobed, X-shaped cross-section. It has a nominal inside diameter of 66.04 mm and a cross-section of 5.33 mm. Manufactured from NBR with a nominal hardness of 70 Shore A, the X-ring can be used in appropriately designed static and dynamic sealing arrangements.

X-Ring 66.04x5.33 NBR - Technical Specification

Product type: X-Ring

Seal type: Four-lobed elastomeric seal

Profile: X-shaped / four-lobed

Inside diameter ID: 66.04 mm

Cross-section CS: 5.33 mm

Nominal size: 66.04x5.33 mm

Material: NBR - Nitrile Butadiene Rubber

Hardness: 70 Shore A

Application type: Static and dynamic sealing

Sales unit: 1 pc.

X-Ring 66.04x5.33 Dimensions

The principal dimensions are:

Inside diameter ID = 66.04 mm

Cross-section CS = 5.33 mm

Nominal size:

66.04x5.33 mm

The first value specifies the nominal inside diameter of the ring.

The second value specifies the nominal cross-sectional size of the X-shaped profile.

Both dimensions should be checked together with the groove geometry when selecting an X-ring.

What Is an X-Ring?

An X-ring is an elastomeric sealing element with a cross-section resembling the letter X.

This type of seal may also be described as:

X seal

Four-lobed seal

Quad-type seal

The X-shaped cross-section creates four lobes rather than the circular cross-section used in a conventional O-ring.

This geometry provides multiple sealing contact areas and creates valleys between the lobes that can retain lubricant in dynamic applications.

Four-Lobed X-Ring Seal Design

The principal feature of an X-ring is its four-lobed symmetrical profile.

When correctly installed in a suitable groove, the geometry provides multiple sealing contact zones.

The four-lobed design can provide important advantages in dynamic sealing arrangements:

greater stability in the groove

reduced tendency to roll or twist during reciprocating movement

lubricant retention between sealing contact areas

lower squeeze requirements in suitable designs

reduced running friction compared with a conventional O-ring in certain dynamic applications

Actual performance depends on groove design, surface finish, lubrication, pressure, speed, temperature, medium and the exact elastomer compound.

X-Ring vs O-Ring - What Is the Difference?

The most important difference is the cross-sectional geometry.

O-Ring:

Circular cross-section

Conventional elastomeric sealing profile

Sealing contact produced by deformation of the round section

X-Ring:

X-shaped four-lobed cross-section

Multiple sealing contact areas

Greater resistance to rolling in suitable dynamic applications

Lubricant can be retained between the lobes

Can require less squeeze in correctly designed dynamic sealing arrangements

An X-ring should not, however, be considered an automatic upgrade or direct replacement for every O-ring.

The groove and operating conditions must be suitable for the X-shaped profile.

Why Use an X-Ring in Dynamic Applications?

One of the principal advantages of the X-profile appears in applications involving relative movement.

A conventional O-ring can, under certain operating conditions, roll or twist inside its groove during reciprocating movement.

Repeated torsional movement can contribute to spiral failure.

The four-lobed X-ring profile provides greater stability against this rolling action.

The valleys between the lobes can also retain lubricant close to the dynamic contact areas, which can contribute to reduced friction when the sealing system is correctly designed.

X-Ring and Lubricant Retention

The X-shaped profile creates small spaces between adjacent sealing lobes.

These areas can act as lubricant reservoirs in dynamic applications.

Maintaining lubricant close to the sealing surfaces can help reduce running friction and wear.

This characteristic is one reason why X-rings are considered for reciprocating and other dynamic sealing applications.

Correct lubrication remains dependent on the medium, seal material and design of the complete sealing system.

Can an X-Ring Replace an O-Ring?

Not automatically.

Even when an X-ring and O-ring have similar nominal inside diameters and cross-sectional dimensions, their profiles are different.

Before substitution, verify:

Groove dimensions

Seal compression / squeeze

Installation clearance

Type of movement

Pressure

Operating medium

Temperature

Speed

Surface finish

Lubrication

Dimensional similarity alone does not establish complete interchangeability between an O-ring and an X-ring.

NBR 70 Shore A X-Ring Material

This X-ring is manufactured from:

NBR - Nitrile Butadiene Rubber

Nominal hardness:

70 Shore A

NBR is a widely used sealing elastomer and is commonly selected for applications involving many mineral oils and lubricating greases.

Compatibility should always be checked against the exact operating medium and service conditions.

A fixed temperature, pressure or speed limit should not be assigned solely from the description NBR 70 Shore A because performance also depends on the exact compound and sealing system.

X-Ring for Static Sealing

X-rings can be used in static sealing arrangements when the groove is correctly designed for the seal profile.

In a static application, there is no continuous relative movement between the principal sealing surfaces.

Compression of the elastomer creates the contact forces required to restrict the passage of the operating medium.

The groove dimensions and compression must be appropriate for the X-ring profile.

X-Ring for Dynamic Sealing

X-rings are also used in appropriately designed dynamic sealing systems.

The four-lobed profile is particularly relevant where reciprocating movement occurs.

Compared with a circular O-ring profile, the X-shaped geometry can provide greater stability against rolling and twisting while creating lubricant-retaining areas between the sealing lobes.

Performance depends on the complete sealing arrangement rather than on the X-ring alone.

X-Ring for Reciprocating Motion

Reciprocating applications involve repeated linear movement between sealing surfaces.

Examples can include appropriately designed:

piston seals

rod seals

hydraulic cylinders

pneumatic cylinders

actuators

The X-profile can be advantageous in these applications because its four-lobed geometry helps stabilize the seal in the groove.

The suitability of this specific 66.04x5.33 mm X-ring must always be determined from the actual groove dimensions and operating conditions.

X-Ring for Hydraulic Systems

X-rings can be used as sealing elements in appropriately designed hydraulic assemblies.

Depending on system construction, X-shaped seals may be found in:

Hydraulic cylinders

Piston assemblies

Rod sealing arrangements

Valves

Pumps

Control components

Industrial hydraulic equipment

The presence of a hydraulic application does not automatically confirm compatibility with this particular X-ring.

Size, groove geometry, pressure, medium, movement and material compatibility must be verified.

X-Ring for Pneumatic Systems

Four-lobed sealing rings can also be used in pneumatic equipment.

Potential applications include appropriately designed:

Pneumatic cylinders

Actuators

Valves

Piston assemblies

Rod sealing arrangements

Industrial automation equipment

In dynamic pneumatic applications, low friction and seal stability can be particularly important.

Correct groove design and lubrication should always be considered.

X-Ring for Piston and Rod Sealing

X-rings can be used in both piston-related and rod-related sealing arrangements when the groove is designed for this type of seal.

Important selection parameters include:

Groove geometry

Seal squeeze

Surface finish

Lubrication

Stroke speed

Pressure

Temperature

Operating medium

For this reason, an X-ring should never be selected from inside diameter alone.

X-Ring for Pumps and Valves

X-shaped seals are also used in pumps, valves and other fluid-handling assemblies.

Depending on equipment design, they can provide sealing between stationary components or components moving relative to each other.

Correct selection requires verification of the original seal dimensions, groove geometry and operating conditions.

How to Select X-Ring 66.04x5.33

The principal product parameters are:

Type - X-Ring

Profile - Four-lobed / X-shaped

ID - 66.04 mm

CS - 5.33 mm

Material - NBR

Hardness - 70 Shore A

Additionally verify:

Groove geometry

Static or dynamic application

Type of movement

Operating medium

Temperature

Pressure

Speed

Lubrication

Surface finish

This provides a more reliable selection method than choosing a seal from its nominal dimensions alone.

How to Measure an X-Ring

The two principal dimensions used for basic X-ring identification are:

Inside diameter ID

and

Cross-section CS

For this product:

ID = 66.04 mm

CS = 5.33 mm

Because elastomers are flexible, measurements taken from a used or deformed seal may differ slightly from the nominal dimensions.

If the original seal designation is known, it should be considered together with physical measurements.

X-Ring 66.04x5.33 and AS568-334 Dimensions

The 66.04 mm inside diameter and 5.33 mm cross-section correspond dimensionally to the nominal ID and cross-section associated with AS568-334 O-ring size.

However, an X-ring has a different cross-sectional geometry from a conventional AS568 O-ring.

Dimensional correspondence therefore does not automatically mean that an O-ring groove designed for AS568-334 is suitable for an X-ring.

The required groove geometry should be verified before changing seal profiles.

X-Ring 66.04x5.33 Industrial Applications

Four-lobed seals can be used in appropriately designed:

Hydraulic systems

Pneumatic systems

Cylinders

Pumps

Valves

Piston assemblies

Rod sealing systems

Industrial machinery

Production equipment

Maintenance and repair applications

MRO operations

Actual suitability depends on the design and operating parameters of the specific sealing position.

Technical Data

Product: X-Ring

Seal type: Four-lobed seal

Profile: X-shaped

Inside diameter ID: 66.04 mm

Cross-section CS: 5.33 mm

Dimensions: 66.04x5.33 mm

Material: NBR

Hardness: 70 Shore A

Application: Static and dynamic sealing

Sales unit: 1 pc.

FAQ

What is an X-Ring?

An X-ring is an elastomeric sealing ring with a four-lobed, X-shaped cross-section. It can be used in appropriately designed static and dynamic sealing systems.

What are the dimensions of this X-Ring?

The nominal inside diameter is 66.04 mm and the cross-section is 5.33 mm.

What material is the X-Ring 66.04x5.33 made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

What is the hardness of this NBR X-Ring?

The nominal hardness is 70 Shore A.

What is the difference between an X-Ring and an O-Ring?

An O-ring has a circular cross-section, while an X-ring has a four-lobed X-shaped profile. The X-profile provides multiple contact areas, lubricant-retaining valleys and greater resistance to rolling in suitable dynamic applications.

Can an X-Ring be used for reciprocating motion?

Yes, X-rings can be used in appropriately designed reciprocating sealing systems. Correct groove geometry, lubrication, surface finish and operating conditions are essential.

Can I replace an O-Ring 66.04x5.33 with this X-Ring?

Not automatically. Although the nominal ID and cross-section may correspond, the profiles and groove requirements differ. The sealing arrangement should be checked before substitution.

Is the X-Ring 66.04x5.33 sold in a 10 pcs pack?

No. This simmering.pl product is sold individually, allowing the required number of seals to be ordered.

AI Overview

X-Ring 66.04x5.33 NBR 70 Shore A is a four-lobed elastomeric seal with a 66.04 mm inside diameter and 5.33 mm cross-section. Its X-shaped profile provides multiple sealing contact areas, lubricant-retaining valleys and increased resistance to rolling in suitable dynamic applications. X-rings can be used in appropriately designed static and dynamic sealing systems.