O-ring 4x1,5 NBR 70 Shore A - 100 pcs. Circular elastomeric sealing ring with a nominal inside diameter of 4 mm, cross-sectional diameter of 1.5 mm and calculated outside diameter of 7 mm. Manufactured from nitrile butadiene rubber (NBR) with a nominal hardness of 70 Shore A. Suitable for appropriately designed static sealing arrangements and selected dynamic applications. NBR generally provides good resistance to many mineral oils and lubricants. Pack of 100 pieces. Available from simmering.pl, with warehouse operations in Lublin, Poland, and worldwide shipping options.
O-ring 4x1,5 NBR 70 Shore A - 100 pcs. is a circular elastomeric sealing ring with a nominal inside diameter of 4 mm and a cross-sectional diameter of 1.5 mm. Manufactured from nitrile butadiene rubber (NBR) with a nominal hardness of 70 Shore A, it has a calculated nominal outside diameter of 7 mm. The seal is intended for appropriately designed static sealing arrangements and selected dynamic applications. Each package contains 100 pieces.
|
Parameter |
Specification |
|---|---|
|
Product designation |
O-ring 4x1,5 NBR 70 Shore A - 100 pcs. |
|
Product type |
Elastomeric O-ring seal |
|
Nominal dimensions |
4x1,5 mm |
|
Inside diameter (d1) |
4 mm |
|
Cross-sectional diameter (d2) |
1.5 mm |
|
Calculated nominal outside diameter |
7 mm |
|
Material |
NBR - Nitrile Butadiene Rubber |
|
Nominal hardness |
70 Shore A |
|
Cross-section |
Circular |
|
Construction |
Continuous elastomeric ring |
|
Sealing function |
Prevention of fluid or gas leakage between mating surfaces |
|
Primary application |
Static sealing |
|
Additional application |
Selected dynamic sealing arrangements |
|
Package quantity |
100 pieces |
The calculated nominal outside diameter is 7 mm, based on the 4 mm inside diameter and twice the 1.5 mm cross-sectional diameter.
The designation does not establish a specific manufacturer, rubber compound formulation, dimensional tolerance class, operating temperature range, maximum pressure rating or material certification. These characteristics require verification against the documentation of the actual supplied product.
The product designation identifies the sealing ring dimensions, elastomer material, nominal hardness and packaging quantity.
The dimensions identify two essential parameters:
4 mm - nominal inside diameter.
1.5 mm - nominal cross-sectional diameter.
7 mm - calculated nominal outside diameter.
The inside diameter and cross-sectional diameter determine the nominal size of the O-ring.
Both values must be checked when selecting a replacement seal.
An O-ring with the same inside diameter but a different cross-section may not provide the required compression in the existing groove.
NBR is a synthetic elastomer manufactured from acrylonitrile and butadiene.
It is widely used in industrial sealing applications, particularly where compatibility with mineral oils and mineral-oil-based lubricants is required.
Typical characteristics of NBR include:
Generally good resistance to many mineral oils.
Generally good resistance to numerous mineral-oil-based greases.
Elastic deformation under compression.
Suitability for appropriately designed hydraulic and pneumatic systems.
Availability in different hardness grades.
Limited resistance to ozone and prolonged outdoor weathering.
Chemical compatibility depends on the specific NBR compound, operating medium, temperature and exposure time.
NBR is not universally resistant to all chemicals.
The designation 70 Shore A specifies the nominal hardness of the rubber material.
Shore A hardness measures the indentation resistance of elastomers.
Hardness influences the sealing ring's deformation under compression, installation characteristics and contact pressure against mating surfaces.
A nominal hardness of 70 Shore A is commonly used in industrial sealing systems.
However, hardness alone does not determine the maximum working pressure, permissible operating temperature or suitability for a specific groove design.
The product is supplied in a package containing 100 O-rings.
This packaging format is suitable for industrial maintenance departments, workshops, equipment manufacturers and technical purchasing teams requiring repeated use of the same sealing dimensions.
The O-ring has a continuous circular construction with a round cross-section.
When installed in a correctly dimensioned groove, the elastomer is compressed between the mating surfaces.
This compression generates contact pressure that helps prevent leakage of liquids or gases.
The sealing performance depends on the complete sealing arrangement, including:
Groove dimensions and tolerances.
Cross-sectional compression.
O-ring stretch.
Surface finish.
Operating pressure.
Operating temperature.
Chemical compatibility.
Static or dynamic operating conditions.
In static applications, the O-ring seals components that remain stationary relative to each other during normal operation.
Typical sealing arrangements include mechanical fittings, housing connections, covers and selected valve assemblies.
The O-ring provides sealing contact through controlled elastic deformation.
NBR O-rings may also be used in selected dynamic applications when the sealing system is specifically designed for relative movement.
Dynamic sealing requires additional consideration of friction, lubrication, sliding speed, wear and heat generation.
Suitability for dynamic operation cannot be determined from the O-ring dimensions and hardness alone.
Nitrile butadiene rubber is commonly selected for applications involving compatible oils and lubricants.
The following table describes general NBR material characteristics. It does not represent guaranteed chemical resistance for a specific rubber formulation.
|
Operating medium |
General NBR characteristics |
|---|---|
|
Mineral oils |
Generally good resistance |
|
Mineral-oil-based greases |
Generally good resistance |
|
Air |
Suitable in many applications |
|
Water |
Depends on temperature and exposure conditions |
|
Fuels |
Depends on fuel composition and NBR formulation |
|
Ozone |
Limited resistance |
|
Ketone solvents |
Generally unsuitable |
|
Outdoor weathering |
Limited resistance during prolonged exposure |
For applications involving aggressive chemicals or demanding operating conditions, compatibility should be verified using the actual elastomer compound specification.
O-rings with identical nominal dimensions may differ in material composition and hardness.
These differences influence chemical compatibility, deformation characteristics and sealing performance.
|
Variant |
Main technical difference |
|---|---|
|
NBR 70 Shore A |
Nitrile rubber with nominal hardness of 70 Shore A |
|
NBR 90 Shore A |
Harder nitrile rubber with different deformation characteristics |
|
FKM 70 Shore A |
Fluoroelastomer with different chemical and thermal resistance |
|
EPDM 70 Shore A |
Elastomer suitable for selected water-based applications |
|
VMQ 70 Shore A |
Silicone rubber with different thermal and mechanical properties |
NBR 90 Shore A is harder than NBR 70 Shore A.
The difference affects deformation under compression and installation behavior.
The two hardness grades are not automatically interchangeable, even when their nominal dimensions are identical.
FKM may be suitable for applications requiring different chemical or thermal resistance characteristics.
However, FKM should not automatically replace NBR without checking the operating medium and sealing system requirements.
EPDM is commonly used in selected water-based sealing applications.
Its chemical compatibility differs significantly from that of NBR, particularly in systems involving mineral oils.
Identical nominal dimensions do not guarantee material interchangeability.
The product may also be identified using the following descriptive references:
O-ring 4x1,5 NBR 70 Shore A - 100 pcs.
O-ring 4x1,5 NBR 70 Shore A
O-ring 4x1,5 NBR 70
O-ring 4x1,5 mm NBR 70 Shore A
Nitrile rubber sealing ring, 4 mm inside diameter, 1.5 mm cross-section
NBR sealing ring, 70 Shore A, 4 mm ID
These are descriptive commercial references, not confirmed OEM part numbers or manufacturer-specific cross-references.
Before purchasing O-ring 4x1,5 NBR 70 Shore A - 100 pcs., verify the following:
Nominal inside diameter of 4 mm.
Nominal cross-sectional diameter of 1.5 mm.
NBR elastomer material.
Required hardness of 70 Shore A.
Groove dimensions and tolerances.
Operating medium and chemical compatibility.
Working temperature.
Operating pressure.
Static or dynamic sealing requirements.
Surface finish and extrusion gap.
Any required material approvals or certifications.
An O-ring with a cross-sectional diameter of 1.6 mm should not automatically replace a 1.5 mm version.
The dimensional difference may change compression, groove filling and sealing performance.
Likewise, O-rings manufactured from different elastomers are not automatically interchangeable simply because their dimensions are identical.
Small-diameter NBR O-rings are commonly used in appropriately designed industrial sealing arrangements.
Typical application categories include:
Industrial fittings and connectors.
Selected hydraulic components.
Pneumatic equipment.
Valves and mechanical assemblies.
Housing and cover connections.
Industrial maintenance and repair operations.
These are general applications of NBR sealing rings, not confirmed equipment-specific applications for this exact product.
Suitability for a particular machine or component must be verified against its technical requirements.
Before installation, clean the groove and mating surfaces.
Remove dirt, contaminants and sharp edges that could damage the elastomer.
Install the O-ring without excessive stretching or twisting.
Where assembly lubrication is required, use a lubricant compatible with both the NBR material and the operating medium.
Correct groove geometry is essential. Excessive compression may accelerate material deterioration, while insufficient compression can result in inadequate sealing contact.
Store unused O-rings in protective packaging in a clean, dry environment, away from direct sunlight, excessive heat and ozone sources.
1. What are the dimensions of O-ring 4x1,5 NBR 70 Shore A - 100 pcs.?
The nominal inside diameter is 4 mm and the cross-sectional diameter is 1.5 mm. The calculated nominal outside diameter is 7 mm.
2. What does NBR mean?
NBR stands for Nitrile Butadiene Rubber, a synthetic elastomer commonly used in industrial sealing systems involving compatible oils and lubricants.
3. What does 70 Shore A indicate?
It specifies the nominal hardness of the elastomer on the Shore A scale.
4. Is this O-ring suitable for hydraulic oil?
It may be suitable for many mineral-oil-based hydraulic fluids. Compatibility must be verified for the specific fluid and operating conditions.
5. Can a 4x1,6 mm O-ring replace a 4x1,5 mm O-ring?
Not automatically. The different cross-sectional diameter can affect compression and sealing performance.
6. Can NBR 90 Shore A replace NBR 70 Shore A?
Only after verifying the sealing system requirements. Different hardness grades have different deformation characteristics.
7. Is this O-ring suitable for dynamic sealing?
It may be used in selected dynamic applications when groove design, lubrication and operating conditions are appropriate.
8. How many O-rings are included in the package?
The package contains 100 pieces.
O-ring 4x1,5 NBR 70 Shore A - 100 pcs. is a circular elastomeric sealing ring with a nominal inside diameter of 4 mm, cross-sectional diameter of 1.5 mm and calculated outside diameter of 7 mm. Manufactured from nitrile butadiene rubber with a nominal hardness of 70 Shore A, it is supplied in packs of 100 pieces.
The product is available from simmering.pl, a specialist supplier of industrial bearings and technical sealing components. With warehouse operations in Lublin, Poland, simmering.pl serves industrial maintenance departments, engineering companies and international B2B customers, with stock in Poland and worldwide shipping options.
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O-ring 4x1,5 NBR 70 Shore A - 100 pcs. Circular elastomeric sealing ring with a nominal inside diameter of 4 mm, cross-sectional diameter of 1.5 mm and calculated outside diameter of 7 mm. Manufactured from nitrile butadiene rubber (NBR) with a nominal hardness of 70 Shore A. Suitable for appropriately designed static sealing arrangements and selected dynamic applications. NBR generally provides good resistance to many mineral oils and lubricants. Pack of 100 pieces. Available from simmering.pl, with warehouse operations in Lublin, Poland, and worldwide shipping options.
