NBR O-Ring Cord 1.50 mm - Industrial Rubber Sealing Cord for Custom O-Rings

NBR O-Ring Cord 1.50 mm - Industrial Rubber Sealing Cord for Custom O-Rings

NBR O-Ring Cord 1.50 mm is a continuous round elastomer sealing cord designed for manufacturing custom-size O-rings and technical sealing rings. With a precise 1.50 mm round cross-section, the cord can be cut to the required length and its ends appropriately joined to create a sealing ring with an individually selected diameter. Manufactured from NBR nitrile butadiene rubber, also known as Buna-N, it provides good resistance to many mineral oils and lubricating greases. This makes 1.50 mm NBR cord 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 1.50 mm

Product Type: O-Ring cord / rubber sealing cord
Material: NBR - Nitrile Butadiene Rubber
Alternative Material Name: Buna-N
Cross-Section: 1.50 mm
Cord Diameter: 1.50 mm
Profile: Round
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
Primary Application: Custom O-rings and technical sealing rings
Industrial Use: Maintenance, MRO, machinery repair and replacement sealing

What Is NBR O-Ring Cord 1.50 mm?

NBR O-Ring cord is supplied as a continuous round elastomer profile rather than as a finished molded ring.

Its main advantage is the possibility of producing an O-ring with a diameter selected for the specific sealing application.

The cord can be measured, cut to the required length and joined using a method suitable for NBR and the intended operating conditions.

This is particularly useful when the required O-ring diameter is non-standard, difficult to source or needed quickly during machinery maintenance.

1.50 mm Round Cross-Section

The key dimensional parameter of this product is:

Cross-Section Diameter: 1.50 mm

The 1.50 mm value refers to the diameter of the round cord profile, not to the inside diameter of the finished O-ring.

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

When selecting cord stock, the cross-section should correspond to the sealing groove geometry and required compression. A 1.50 mm cord should therefore not automatically be replaced by a 1.00 mm, 2.00 mm or other cross-section.

NBR Nitrile Butadiene Rubber

NBR, or nitrile butadiene rubber, 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 suitable for numerous standard mechanical and industrial sealing applications.

Final material compatibility should always be verified against the specific fluid, additives, operating temperature and actual service conditions.

Custom O-Rings from 1.50 mm NBR Cord

One of the main reasons for using 1.50 mm NBR O-Ring Cord is the ability to manufacture sealing rings with custom diameters.

This can be particularly useful when:

• the required O-ring diameter is non-standard
• the correct molded O-ring is unavailable
• older industrial machinery is being repaired
• a custom sealing diameter is required
• maintenance personnel need a replacement seal quickly
• several different ring diameters are required with the same 1.50 mm cross-section

One cord cross-section can therefore be used to prepare multiple O-ring diameters according to maintenance requirements.

NBR O-Ring Cord for Industrial Maintenance and MRO

1.50 mm NBR O-Ring Cord is particularly useful as part of industrial maintenance and MRO inventory.

Keeping cord stock available can allow maintenance personnel to prepare a required sealing ring when the correct molded O-ring is not immediately available from warehouse stock.

This can be valuable during:

• emergency machinery repairs
• scheduled maintenance
• machine overhauls
• servicing of older equipment
• repair of custom machinery
• maintenance of non-standard assemblies

For MRO departments, cord stock provides dimensional flexibility without requiring every possible O-ring diameter to be held in inventory.

Industrial Sealing Applications

NBR sealing cord with a 1.50 mm cross-section can be used to manufacture appropriately selected sealing rings for:

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

The suitability of the finished seal depends on groove geometry, compression, operating medium, temperature, pressure and type of movement.

O-Ring Cord vs Molded O-Ring

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

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

This provides greater flexibility when unusual or large ring diameters are required.

However, the finished cord ring contains a joint between the two ends.

For this reason, a custom O-ring made from joined cord 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 1.50 mm NBR O-Ring Cord

Before using the cord, verify:

Cord Diameter: 1.50 mm
Cross-Section: Round
Material: NBR
Groove Dimensions: Suitable for 1.50 mm cord
Operating Medium: Compatible with NBR
Operating Temperature: Suitable for the specific NBR compound
Pressure Conditions: Appropriate for the sealing arrangement
Application Type: Static or dynamic
Joining Method: Suitable for NBR and the intended application

The sealing groove and required compression should be checked before selecting the cord cross-section.

Joining NBR O-Ring Cord

When manufacturing a custom sealing ring, the quality of the cord joint is important.

The cord should be accurately measured and cut, and the ends should be prepared so that they can be joined without unnecessary misalignment.

Poorly aligned or uneven ends can create a discontinuity in the sealing surface.

The joining method should be selected according to the NBR compound and intended operating conditions.

For critical sealing applications, a factory-molded O-ring may be preferable where the required size is available.

Storage of NBR O-Ring Cord

O-ring cord intended for maintenance stock should be stored under conditions that help 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, protected and free from mechanical damage until it is prepared for use.

Why 1.50 mm NBR Cord Is Useful for Maintenance Stock

A maintenance department may require many different O-ring diameters while using the same cross-section.

Keeping 1.50 mm NBR cord stock provides the ability to prepare different ring circumferences from one continuous sealing profile.

This can reduce the need to hold numerous unusual O-ring diameters and can provide an additional repair option when a specific molded ring is not immediately available.

It is therefore particularly relevant to industrial maintenance, technical service companies and machinery repair operations.

Operational Advantages

1.50 mm round cross-section: provides a defined profile for sealing grooves designed for this cord diameter.

Custom ring diameter: allows sealing 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 when an unusual molded O-ring is unavailable during maintenance or repair.

Inventory flexibility: one cord cross-section can support multiple required ring diameters.

Industrial application: suitable for appropriately selected machinery maintenance, servicing and custom sealing requirements.

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FAQ - NBR O-Ring Cord 1.50 mm

What is NBR O-Ring Cord 1.50 mm?
It is a continuous round sealing profile made from nitrile rubber with a 1.50 mm cross-section, primarily used to manufacture custom-diameter O-rings and technical sealing rings.

Does 1.50 mm refer to the diameter of the finished O-ring?
No. The 1.50 mm dimension refers to the cross-sectional diameter of the cord. The final O-ring diameter depends on the length of cord used.

Can custom-size O-rings be made from 1.50 mm NBR cord?
Yes. The cord can be cut to the required length and its ends appropriately joined to create a sealing ring with the required circumference.

Is 1.50 mm 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 fluid, additives and operating temperature.

Can 1.50 mm cord be replaced with 2.00 mm O-Ring cord?
Not without checking the sealing groove. Changing the cross-section changes the compression and geometry of the installed seal.

Can large-diameter O-rings be manufactured from cord stock?
Yes. Producing unusual or large-diameter sealing rings is one of the important applications of O-ring cord, provided the selected cross-section is appropriate for the sealing groove.

Is a joined O-Ring cord seal identical to a molded O-ring?
No. A ring manufactured from cord contains a joint between its ends. Its suitability should therefore be evaluated according to the specific sealing application.

Frequently Asked Questions by Engineers

How is the required length of 1.50 mm O-Ring cord determined?
The required length depends on the target ring dimensions, groove geometry and method used to join the cord ends. Dimensional accuracy is particularly important when producing smaller sealing rings.

Does the cord joint affect sealing performance?
Yes. Cutting accuracy, end alignment and joint integrity can directly affect the continuity of the sealing surface.

Is 1.50 mm NBR cord suitable for dynamic applications?
Suitability depends on the sealing arrangement. Because a ring manufactured from cord contains a joint, dynamic applications require careful technical evaluation.

What should be checked before selecting 1.50 mm O-Ring cord?
The cord cross-section, groove dimensions, required compression, operating medium, temperature, pressure and joining method should all be considered.

Why is O-Ring cord useful for MRO inventory?
It allows maintenance teams to manufacture multiple ring diameters from a single cord cross-section, providing additional flexibility when non-standard molded O-rings are unavailable.

When should a molded O-ring be preferred over cord stock?
A molded O-ring should generally be preferred when the correct size is readily available and the application requires a continuous ring without a joined section, particularly in demanding dynamic or pressure-sensitive sealing arrangements.