O-ring NBR 11.5x1 mm 70 Shore A

Product Characteristics

The 11.5x1 mm NBR O-ring is a flexible sealing element with a circular cross-section. Its purpose is to restrict the passage of liquids or gases through the gap between mating components.

The 1 mm cross-section allows this type of seal to be used in small sealing grooves, provided that the groove dimensions and compression are correctly specified.

Key features:

• Inside diameter: 11.5 mm.

• Cross-sectional diameter: 1 mm.

• Nominal outside diameter: 13.5 mm.

• Material: NBR nitrile butadiene rubber.

• Nominal hardness: 70 Shore A.

• Circular cross-section.

• One-piece elastomeric construction.

• No metal reinforcement.

• Intended for appropriately designed static sealing applications.

• Potential use in selected dynamic applications after verification of operating conditions.

• Packaging: 100 pieces per pack.

Technical Specifications

The outside diameter of 13.5 mm is a nominal value calculated from the stated dimensions. Manufacturing tolerances, specific NBR compound properties and permissible operating parameters must be confirmed using the documentation for the actual product.

What Does O-ring NBR 11.5x1 mm 70 Shore A Mean?

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

11.5 - nominal inside diameter of 11.5 mm.

1 - nominal cross-sectional diameter of 1 mm.

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

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

100 pcs - the number of sealing rings supplied in one commercial pack.

The designation does not specify a manufacturer, exact elastomer compound, dimensional tolerance standard or maximum operating pressure.

O-ring Dimensions - 11.5x1 mm

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

For this product:

• Inside diameter: 11.5 mm.

• Cross-sectional diameter: 1 mm.

• Nominal outside diameter: 13.5 mm.

Outside diameter calculation:

11.5 mm + 2 x 1 mm = 13.5 mm.

The 1 mm cross-section requires accurate groove dimensions. Incorrect groove depth, excessive clearance or damaged mating surfaces can reduce sealing effectiveness.

NBR Material - Properties and Chemical Resistance

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

Typical properties of appropriately selected NBR compounds include:

• Good resistance to many mineral oils.

• Compatibility with numerous industrial greases.

• Suitability for selected hydraulic systems using mineral oil-based fluids.

• Elasticity required for effective sealing.

• Mechanical properties useful in many industrial applications.

Chemical resistance depends on the rubber compound formulation, operating temperature, exposure duration and type of medium.

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

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 operating pressure.

• Resistance to extrusion into clearance gaps.

• Friction and wear in dynamic sealing applications.

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

For an O-ring with a 1 mm cross-section, correct groove geometry and clearance control are particularly important.

Construction and Sealing Principle

O-ring NBR 11.5x1 mm 70 Shore A is a one-piece elastomeric ring without a spring, metal reinforcement or additional sealing lips.

When installed in a correctly designed groove, its cross-section undergoes elastic deformation.

The resulting contact pressure against the mating surfaces creates a sealing interface that restricts the passage of the medium.

Effective sealing depends on:

• Groove dimensions and tolerances.

• Cross-sectional compression.

• Groove filling.

• Surface finish of mating components.

• Clearance gap dimensions.

• Compatibility between NBR and the sealed medium.

• Operating temperature and pressure.

The nominal dimensions 11.5x1 mm alone do not establish the maximum permissible pressure or temperature.

O-ring NBR 11.5x1 mm 70 Shore A vs Other Variants

This comparison describes dimensional and material differences. It does not confirm the commercial availability of every listed variant.

Products with similar dimensions are not automatically interchangeable.

Alternative Designations and References

Common alternative descriptions include:

• O-ring NBR 11.5x1 mm 70 Shore A

• O-ring 11.5x1 NBR 70

• NBR O-ring 11.5x1 mm 70 Shore A

• Nitrile rubber sealing ring 11.5x1 mm

• O-ring NBR 11.5x1 mm 70 Shore A - 100 pcs

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

Selection and Interchangeability

Before purchasing, verify:

1. Inside diameter: 11.5 mm.

2. Cross-sectional diameter: 1 mm.

3. Material: NBR.

4. Nominal hardness: 70 Shore A.

5. Groove dimensions and tolerances.

6. Required cross-sectional compression.

7. Type of sealed medium.

8. Operating temperature and pressure.

9. Movement characteristics of mating components.

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

For small cross-sectional O-rings, a replacement should not be selected solely on the basis of a similar inside diameter.

Typical Applications of NBR O-rings with a 1 mm Cross-Section

NBR O-rings with a small cross-section may be used in appropriately designed technical sealing arrangements.

Typical application areas include:

• Small valves.

• Pneumatic fittings.

• Hydraulic system components.

• Dosing mechanisms.

• Housings for small mechanical assemblies.

• Measuring instruments.

• Industrial equipment with suitable sealing grooves.

These are general application areas for this type of sealing ring, not confirmed compatibility references for specific equipment using the 11.5x1 mm size.

Installation and Storage Guidelines

Care should be taken when installing an O-ring with a 1 mm cross-section.

Recommended precautions:

• Clean the sealing groove and mating surfaces.

• Remove burrs and sharp edges.

• Avoid excessive stretching.

• Prevent twisting, cutting or pinching outside the groove.

• Use installation lubricants only after confirming compatibility with NBR and the sealed medium.

• Check that the sealing ring is correctly positioned.

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

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

Pack of 100 Pieces - Industrial and B2B Supply

O-ring NBR 11.5x1 mm 70 Shore A is supplied in packs containing 100 pieces.

This packaging format is suitable for:

• Industrial maintenance departments.

• Machinery service providers.

• Manufacturing facilities.

• Technical workshops.

• Spare parts inventories.

• Industrial distributors and B2B customers.

One sales unit contains 100 O-rings.

Frequently Asked Questions

What are the dimensions of O-ring NBR 11.5x1 mm?

The inside diameter is 11.5 mm, the cross-sectional diameter is 1 mm and the calculated nominal outside diameter is 13.5 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.

Can an 11.5x1 mm O-ring be replaced with a 12x1 mm version?

Not automatically. The difference in inside diameter affects fit, stretching and sealing conditions.

Is an NBR O-ring suitable for oil?

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

Can the 11.5x1 mm O-ring be used in dynamic sealing applications?

It may be considered for selected dynamic applications, subject to groove design, movement speed, lubrication and friction conditions.

Does 70 Shore A mean the O-ring can withstand 70 bar?

No. Shore A is an elastomer hardness scale, not a pressure rating.

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 11.5x1 mm 70 Shore A.

O-ring NBR 11.5x1 mm 70 Shore A - Key Technical Information

O-ring NBR 11.5x1 mm 70 Shore A is an elastomeric sealing ring with an inside diameter of 11.5 mm and a cross-sectional diameter of 1 mm. Its nominal outside diameter is 13.5 mm. Manufactured from nitrile butadiene rubber with a nominal hardness of 70 Shore A, it is intended for appropriately designed sealing applications and 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, machinery servicing, manufacturing operations and B2B distribution.

O-ring NBR 11.5x1 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.