NBR O-Ring Cord 2.00 mm - Rubber Cord for Custom O-Rings

NBR O-Ring Cord 2.00 mm - Rubber Cord for Custom O-Rings

NBR O-Ring Cord 2.00 mm is a continuous elastomer sealing cord with a 2.00 mm round cross-section, designed for producing custom-diameter O-rings and sealing rings. Manufactured from NBR nitrile butadiene rubber, the cord can be cut to the required length and its ends appropriately joined to create a custom-size seal. It is particularly useful for industrial maintenance, MRO, machinery repair and applications where a standard molded O-ring in the required diameter is unavailable.

Technical Specifications - NBR O-Ring Cord 2.00 mm

Product Type: O-Ring cord / rubber sealing cord
Material: NBR, nitrile butadiene rubber
Alternative Material Name: Buna-N
Profile: Round
Cord Diameter: 2.00 mm
Cross-Section: 2.00 mm
Color: Black
Form: Continuous elastomer cord
Typical Temperature Range: approximately -30 to +100°C, depending on NBR compound, medium and operating conditions
Resistance: many mineral oils, lubricating greases and compatible technical fluids
Application: Custom O-rings, static sealing, machinery repair, industrial maintenance and MRO

What Is NBR O-Ring Cord 2.00 mm Used For?

O-ring cord is primarily used when a sealing ring with a non-standard or difficult-to-source diameter is required.

Unlike a molded O-ring with a predetermined inside diameter, cord stock can be cut to the required length. The prepared ends are then joined using an appropriate method to form a closed sealing ring.

This makes O-ring cord particularly useful when repairing older machinery, custom equipment and assemblies requiring unusual sealing diameters.

2.00 mm Round Cross-Section

The fundamental dimension of this product is its:

Cross-section diameter: 2.00 mm

The cord has a round profile corresponding to the cross-sectional geometry of a conventional O-ring.

The final diameter of the manufactured sealing ring depends on the length of cord used.

A 2.00 mm cord should not automatically be replaced with a different cross-section because the groove dimensions and required sealing compression must correspond to the selected cord diameter.

NBR Nitrile Butadiene Rubber

NBR, also known as Buna-N, is one of the most widely used elastomers in industrial sealing technology.

It provides good resistance to many:

• mineral oils
• lubricating greases
• compatible hydraulic oils
• technical lubricants
• oil-based industrial fluids

These characteristics make NBR O-ring cord suitable for numerous mechanical and industrial sealing applications.

Final material compatibility should always be checked against the specific fluid, additives, operating temperature and application conditions.

Making Custom-Size O-Rings

One of the primary advantages of 2.00 mm NBR O-Ring Cord is the ability to produce sealing rings with individually selected diameters.

This can be useful when:

• the required O-ring diameter is non-standard
• a molded O-ring is difficult to source
• older machinery is being repaired
• a large-diameter sealing ring is required
• maintenance personnel need a replacement seal quickly
• several ring diameters are required with the same 2.00 mm cross-section

One cord size can therefore provide material for producing multiple O-ring diameters while maintaining the same cross-sectional dimension.

NBR O-Ring Cord for MRO and Maintenance

NBR O-Ring Cord 2.00 mm can be a useful component of industrial MRO and maintenance inventory.

Keeping cord stock available allows maintenance personnel to prepare a required sealing diameter without stocking numerous molded O-rings with the same cross-section but different inside diameters.

This can be particularly useful during machinery overhauls, emergency repairs and maintenance of older or specialized equipment.

Industrial Applications

The 2.00 mm NBR sealing cord can be used to manufacture appropriately selected seals for:

• industrial machinery
• covers
• housings
• flanges
• mechanical equipment
• oil-lubricated assemblies
• maintenance equipment
• custom sealing grooves
• industrial repair applications

The groove geometry, compression, operating medium, pressure and temperature must be considered when designing or replacing the seal.

O-Ring Cord vs Molded O-Ring

A conventional O-ring is manufactured as a continuous molded ring with a defined inside diameter and cross-section.

O-ring cord is supplied as a continuous elastomer profile that can be cut and joined to produce a ring with the required circumference.

This provides considerable dimensional flexibility, but the finished seal contains a joint between the two cord ends.

For this reason, a joined O-ring cord seal should not automatically be considered equivalent to a molded O-ring in every application, particularly in demanding dynamic or high-pressure sealing systems.

How to Select 2.00 mm O-Ring Cord

Before using the cord, verify:

Cord Diameter: 2.00 mm
Cross-Section: Round
Material: NBR
Groove Dimensions: Suitable for a 2.00 mm cross-section
Operating Medium: Compatible with NBR
Temperature: Suitable for the specific NBR compound
Pressure: Appropriate for the sealing arrangement
Application Type: Static or dynamic
Joining Method: Suitable for the material and application

Accurate preparation of the cord ends is particularly important when producing a closed sealing ring.

Storage of NBR O-Ring Cord

NBR cord intended for maintenance stock should be stored under conditions that limit unnecessary elastomer ageing.

Avoid prolonged exposure to:

• direct sunlight
• UV radiation
• excessive heat
• ozone sources
• aggressive chemicals
• unnecessary stretching
• permanent deformation

The cord should remain clean and protected until it is cut and prepared for installation.

Operational Advantages

2.00 mm round profile: suitable for sealing grooves designed for this specific cross-section.

Custom ring diameter: allows O-rings of different diameters to be produced from the same cord.

NBR material: provides good resistance to many mineral oils and lubricating greases.

MRO flexibility: useful for emergency repairs and maintenance of machinery with unusual seal dimensions.

Reduced inventory complexity: one cord cross-section can support several required sealing diameters.

Industrial maintenance application: useful for repair, servicing and custom sealing requirements.

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FAQ - NBR O-Ring Cord 2.00 mm

What is NBR O-Ring Cord 2.00 mm?
It is a continuous round sealing profile made from NBR with a 2.00 mm cross-section, used to manufacture sealing rings with individually selected diameters.

Can a custom O-ring be made from 2 mm NBR cord?
Yes. The cord can be cut to the required length and its ends appropriately joined to create a closed sealing ring.

Is NBR O-ring cord resistant to oil?
NBR provides good resistance to many mineral oils and lubricating greases. Compatibility should still be checked for the specific operating fluid and temperature.

Does 2.00 mm refer to the diameter of the finished O-ring?
No. It refers to the cross-sectional diameter of the cord. The finished ring diameter depends on the length of cord used.

Can O-ring cord replace every molded O-ring?
No. A seal produced from cord contains a joined section and is therefore not automatically equivalent to a continuously molded O-ring in demanding dynamic or high-pressure applications.

Why is O-ring cord useful for machinery maintenance?
It allows maintenance personnel to manufacture a required sealing diameter when the correct molded O-ring is unavailable or when non-standard dimensions are required.

Can different O-ring diameters be made from the same 2 mm cord?
Yes. The cross-section remains 2.00 mm, while the length of cord can be adjusted to produce different ring circumferences.

Frequently Asked Questions by Engineers

How is the required cord length calculated for a custom O-ring?
The required length depends on the target ring dimensions and how the sealing groove is specified. The joining method and required dimensional accuracy should also be considered before cutting.

Does the joint affect sealing performance?
Yes. The accuracy and integrity of the joined ends directly affect the continuity of the sealing surface.

Is 2.00 mm NBR O-ring cord suitable for dynamic sealing?
Suitability depends on the application. Because the finished ring contains a joint, cord stock is particularly practical for many static sealing applications, while dynamic applications require more careful technical evaluation.

Can large-diameter O-rings be made from 2 mm cord?
Yes. Producing non-standard and large-diameter sealing rings is one of the main applications of O-ring cord, provided a 2.00 mm cross-section is suitable for the sealing groove.

What should be checked before selecting NBR O-ring cord?
Verify the cross-section, groove dimensions, material compatibility, operating temperature, pressure, sealing type and joining method.