O-ring NBR 1.15x1 mm 70 Shore A

Product Characteristics

The 1.15x1 mm NBR O-ring is a small sealing component with a circular cross-section.

Its miniature dimensions make it suitable for precisely designed sealing grooves requiring a nominal inside diameter of 1.15 mm and a cross-sectional diameter of 1 mm.

The NBR elastomer is intended for use with fluids and lubricants chemically compatible with the specific rubber compound.

Key features:

• Inside diameter: 1.15 mm.

• Cross-sectional diameter: 1 mm.

• Nominal outside diameter: 3.15 mm.

• Material: NBR nitrile butadiene rubber.

• Nominal hardness: 70 Shore A.

• One-piece elastomeric construction.

• Circular cross-section.

• Designed for appropriately dimensioned sealing grooves.

• Suitable for properly designed static sealing applications.

• Dynamic applications require additional verification.

• Packaging: 100 pieces per pack.

Technical Specifications

The outside diameter of 3.15 mm is a nominal value calculated from the stated dimensions. Exact dimensional tolerances and properties of the specific NBR compound must be confirmed using the relevant product documentation.

What Does O-ring NBR 1.15x1 mm 70 Shore A Mean?

O-ring - a continuous elastomeric sealing ring with a circular cross-section.

1.15 - nominal inside diameter of 1.15 mm.

1 - nominal cross-sectional diameter of 1 mm.

NBR - nitrile butadiene rubber, a synthetic elastomer commonly used in industrial sealing technology.

70 Shore A - nominal elastomer hardness measured on the Shore A scale.

100 pcs - the number of O-rings included in one commercial pack.

The designation does not identify a specific manufacturer, NBR compound formulation, dimensional tolerance class or maximum operating pressure.

O-ring Dimensions - 1.15x1 mm

O-ring dimensions are normally specified by the inside diameter followed by the cross-sectional diameter.

For this product:

• Inside diameter: 1.15 mm.

• Cross-sectional diameter: 1 mm.

• Nominal outside diameter: 3.15 mm.

Outside diameter calculation:

1.15 mm + 2 x 1 mm = 3.15 mm.

Due to the miniature dimensions, groove accuracy, surface condition and correct seal positioning are particularly important.

An O-ring measuring 1.15x1 mm is not automatically interchangeable with a 1x1 mm, 1.2x1 mm or 1.15x1.5 mm sealing ring.

NBR Material - Properties and Chemical Resistance

NBR is a synthetic elastomer widely used in industrial sealing applications.

Appropriately formulated NBR compounds typically provide:

• Good resistance to many mineral oils.

• Compatibility with numerous industrial greases.

• Suitability for selected mineral oil-based hydraulic fluids.

• Elasticity required for effective sealing.

• Mechanical properties suitable for many industrial applications.

Chemical resistance depends on the specific NBR compound and operating conditions.

Compatibility with all solvents, brake fluids, fuels or aggressive chemicals must not be assumed.

The sealed medium, temperature, exposure duration and material formulation should be evaluated before use.

What Does 70 Shore A Hardness Mean?

A nominal hardness of 70 Shore A describes the elastomer's resistance to indentation as measured on the Shore A scale.

Hardness influences:

• Deformation during installation.

• Contact pressure against sealing surfaces.

• Behaviour under mechanical loading.

• Resistance to extrusion into clearance gaps.

• Friction in dynamic sealing applications.

A hardness of 70 Shore A does not indicate a maximum operating pressure of 70 bar.

For a miniature 1.15x1 mm O-ring, correct compression and groove geometry are especially important.

Construction and Sealing Principle

O-ring NBR 1.15x1 mm 70 Shore A is a one-piece elastomeric sealing ring.

It has no metal reinforcement, spring or additional sealing lip.

When positioned in a correctly designed groove and compressed between mating surfaces, its circular cross-section undergoes controlled deformation.

The resulting contact pressure creates a sealing interface that helps prevent leakage.

Effective sealing depends on:

• Groove dimensions and tolerances.

• Cross-sectional compression.

• Groove filling.

• Surface finish of mating components.

• Clearance gap dimensions.

• Operating temperature and pressure.

• Compatibility between NBR and the sealed medium.

The nominal dimensions alone do not define the maximum permissible pressure or the required groove dimensions.

O-ring NBR 1.15x1 mm 70 Shore A vs Other Variants

The table compares dimensions and materials. It does not confirm the commercial availability of each alternative.

In miniature sealing applications, even small dimensional differences can affect installation and sealing performance.

Alternative Designations and References

Common product descriptions include:

• O-ring NBR 1.15x1 mm 70 Shore A

• O-ring 1.15x1 NBR 70

• NBR O-ring 1.15x1 mm

• Miniature nitrile rubber O-ring 1.15x1 mm

• O-ring NBR 1.15x1 mm 70 Shore A - 100 pcs

These are alternative descriptions of the product dimensions and material, not verified OEM references or manufacturer-specific part numbers.

Selection and Interchangeability

Before purchasing, verify:

1. Inside diameter: 1.15 mm.

2. Cross-sectional diameter: 1 mm.

3. Material: NBR.

4. Nominal hardness: 70 Shore A.

5. Sealing groove dimensions.

6. Required dimensional tolerances.

7. Type of sealed medium.

8. Operating temperature and pressure.

9. Movement of mating components.

10. Any requirements for certification or a specific elastomer compound.

Similar dimensions do not automatically guarantee interchangeability.

A replacement must be selected according to the actual sealing groove and operating conditions.

Typical Applications of Miniature NBR O-rings

Miniature NBR O-rings may be used in appropriately designed sealing arrangements for small technical components.

Typical application areas for this type of seal include:

• Small hydraulic connections.

• Miniature pneumatic components.

• Precision valves.

• Small technical fittings.

• Dosing mechanisms.

• Industrial instrumentation components.

• Measuring equipment with suitable sealing grooves.

These are general application areas for miniature O-rings, not confirmed fitment references for a particular valve, machine or equipment model.

Installation and Storage Guidelines

Installation of an O-ring with a 1.15 mm inside diameter requires particular care due to its small size.

Recommended precautions:

• Clean the sealing groove before installation.

• Check for burrs and sharp edges.

• Use tools suitable for miniature seals.

• Avoid excessive stretching.

• Prevent twisting, cutting or pinching the elastomer.

• Use installation lubricants only after confirming compatibility with NBR.

• Do not install damaged or permanently deformed O-rings.

Store the seals in a clean, dry environment away from direct sunlight, heat sources and ozone.

Pack of 100 Pieces - Industrial and B2B Supply

O-ring NBR 1.15x1 mm 70 Shore A is supplied in packs containing 100 pieces.

This packaging format is suitable for:

• Precision equipment service providers.

• Industrial maintenance departments.

• Manufacturing facilities.

• Technical workshops.

• Spare parts inventories.

• Industrial distributors.

• B2B purchasing departments.

One sales unit contains 100 O-rings.

Frequently Asked Questions

What are the dimensions of O-ring NBR 1.15x1 mm?

The inside diameter is 1.15 mm, the cross-sectional diameter is 1 mm and the calculated nominal outside diameter is 3.15 mm.

What does NBR 70 Shore A mean?

NBR identifies the nitrile rubber material, while 70 Shore A specifies the nominal hardness of the elastomer.

Is the 1.15x1 mm O-ring a miniature seal?

Yes. With an inside diameter of 1.15 mm and a cross-section of 1 mm, it is classified descriptively as a miniature sealing ring.

Can a 1.15x1 mm O-ring be replaced with a 1.2x1 mm version?

Not automatically. The difference in inside diameter can affect stretching, groove fit and sealing performance.

Is an NBR O-ring suitable for contact with oil?

NBR is generally compatible with many mineral oils, but compatibility with the specific fluid and operating conditions must be verified.

Can the 1.15x1 mm O-ring be used in dynamic applications?

Suitability depends on groove design, movement speed, friction, lubrication and elastomer properties.

Is this O-ring certified for food contact?

Food-contact certification cannot be confirmed from the designation NBR 70 Shore A alone. Documentation for the specific product is required.

How many O-rings are included in one pack?

Each pack contains 100 pieces of O-ring NBR 1.15x1 mm 70 Shore A.

O-ring NBR 1.15x1 mm 70 Shore A - Key Technical Information

O-ring NBR 1.15x1 mm 70 Shore A is a miniature sealing ring with a nominal inside diameter of 1.15 mm and a cross-sectional diameter of 1 mm. Its calculated outside diameter is 3.15 mm. Manufactured from nitrile butadiene rubber with a nominal hardness of 70 Shore A, it is supplied in packs of 100 pieces.

NBR O-rings at simmering.pl

simmering.pl supplies NBR, FKM, EPDM and other industrial O-rings, alongside rotary shaft oil seals, bearings and technical sealing components.

Our product range supports industrial maintenance, precision equipment servicing, manufacturing operations and B2B distribution.

O-ring NBR 1.15x1 mm 70 Shore A is offered in packs of 100 pieces.

Our warehouse is located in Lublin, Poland, with stock in Poland and worldwide shipping.