O-Ring 1x2 NBR 70 ShA

O-Ring 1x2 NBR 70 ShA (100 pcs) is a package of 100 GRN elastomer sealing rings with a 1 mm inside diameter and 2 mm circular cross-section. The O-rings are manufactured from NBR nitrile rubber with a nominal hardness of 70 Shore A. The resulting nominal outside diameter for the 1x2 mm geometry is 5 mm.

O-Ring 1x2 NBR 70 ShA - Product Characteristics

This exact product variant is identified by:

Size: 1x2 mm
Material: NBR
Hardness: 70 ShA / 70 Shore A
Brand: GRN
Quantity: 100 pcs

An O-ring is a closed elastomer sealing element with a circular cross-section. When installed in a correctly dimensioned groove, its cross-section is compressed between the mating surfaces to create sealing contact.

For correct identification, the complete combination 1x2 mm + NBR + 70 ShA should be considered rather than dimensions alone.

O-Ring 1x2 mm Dimensions

The dimensional designation 1x2 mm means:

d1 - Inside Diameter: 1 mm
d2 - Cross-Section Diameter: 2 mm

The nominal outside diameter is calculated as:

1 mm + 2 x 2 mm = 5 mm

Therefore, the nominal geometry is:

Inside Diameter d1: 1 mm
Cross-Section d2: 2 mm
Outside Diameter: 5 mm

For O-rings, the first value specifies the inside diameter, while the second specifies the diameter of the circular cross-section.

NBR - Nitrile Butadiene Rubber

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers in technical sealing applications.

NBR is commonly selected for its compatibility with many mineral oils, mineral greases and mineral-oil-based hydraulic fluids. These characteristics make nitrile rubber suitable for a broad range of mechanical, hydraulic and pneumatic sealing systems.

NBR should not, however, be considered universally resistant to every fluid or chemical.

For a specific installation, compatibility should be evaluated against the actual medium, operating temperature, exposure duration and service conditions.

70 ShA Hardness

The designation 70 ShA means a nominal elastomer hardness of 70 Shore A.

Hardness influences how the O-ring deforms during installation and behaves under compression within the sealing groove.

The value 70 ShA is not a pressure rating.

Permissible pressure depends on the complete sealing arrangement, including groove geometry, extrusion gap, medium, temperature and operating conditions.

How Does O-Ring 1x2 NBR Work?

The sealing function is generated through controlled compression of the circular elastomer cross-section.

For this O-ring, the nominal cross-section diameter is 2 mm.

When installed in a correctly designed groove, the elastomer is compressed between the mating surfaces. Its elastic deformation generates contact pressure against these surfaces and creates the sealing interface.

Effective sealing therefore depends on both the O-ring specification and the design of the complete sealing arrangement.

Small O-Ring with 2 mm Cross-Section

O-Ring 1x2 NBR 70 ShA is a compact sealing element with a nominal inside diameter of only 1 mm and a cross-section diameter of 2 mm.

Its nominal outside diameter is approximately 5 mm.

With small O-rings, correct groove dimensions and careful installation are particularly important. The ring should not be cut, twisted or excessively stretched during assembly.

Static and Dynamic Sealing

O-rings are widely used in static sealing arrangements and may also be used in appropriately engineered dynamic applications.

In static sealing, there is no intended relative movement between the mating surfaces during operation.

Dynamic applications introduce additional factors such as friction, lubrication, movement speed, surface finish and wear.

The 1x2 mm, NBR and 70 ShA specification alone therefore does not confirm suitability for every dynamic application.

O-Ring NBR 1x2 and Oils

NBR is commonly used in sealing systems involving many mineral oils and mineral greases.

However, the general description of NBR as oil resistant should not be interpreted as compatibility with every oil, lubricant, fuel or hydraulic fluid.

The exact medium, additives and operating temperature should be considered when selecting an elastomer for a specific application.

Operating Temperature - Selection Note

A universal operating temperature range should not be assigned to every NBR 70 ShA O-ring based solely on the material designation.

Temperature capability depends on the exact NBR compound, operating medium, duration of exposure and service conditions.

For critical installations, the permitted temperature range should be verified for the specific elastomer compound.

100-Piece Package

This product page specifically covers:

O-Ring 1x2 NBR 70 ShA (100 pcs)

The package contains 100 O-rings with the same nominal dimensional and material specification.

The 100-piece format is suitable for repeated use in assembly, maintenance, service operations or technical inventory.

For this package variant, the product naming sequence remains:

O-Ring 1x2 NBR 70 ShA (100 pcs)

Selection and Interchangeability

When selecting an equivalent for O-Ring 1x2 NBR 70 ShA, compare at least:

Inside Diameter: d1 = 1 mm
Cross-Section: d2 = 2 mm
Material: NBR
Hardness: 70 ShA
Dimensional tolerances
Medium compatibility
Operating temperature
Groove geometry

Matching the nominal 1x2 mm dimensions alone is insufficient to confirm full interchangeability.

An O-ring manufactured from FKM, EPDM or VMQ can have identical nominal dimensions but significantly different chemical and thermal characteristics.

Technical Specification

Product Name: O-Ring 1x2 NBR 70 ShA (100 pcs)
Product Type: O-ring / elastomer sealing ring
Brand: GRN
Nominal Size: 1x2 mm
d1 - Inside Diameter: 1 mm
d2 - Cross-Section Diameter: 2 mm
Nominal Outside Diameter: 5 mm
Material: NBR
Material Name: Nitrile Butadiene Rubber
Hardness: 70 ShA / 70 Shore A
Cross-Section: Circular
Quantity: 100 pcs

FAQ

What are the dimensions of O-Ring 1x2 NBR 70 ShA?

The O-ring has a 1 mm inside diameter and 2 mm cross-section diameter. Its nominal outside diameter is 5 mm.

What does 1x2 mm mean for an O-ring?

1 mm is the inside diameter, while 2 mm is the diameter of the circular cross-section.

What is the outside diameter of a 1x2 mm O-ring?

The nominal outside diameter is 5 mm, calculated as 1 + 2 x 2 = 5 mm.

What does NBR mean?

NBR means Nitrile Butadiene Rubber, an elastomer widely used in technical sealing applications.

What does 70 ShA mean?

70 ShA specifies a nominal hardness of 70 on the Shore A scale. It describes elastomer hardness and is not a pressure rating.

Can O-Ring 1x2 NBR be used with oil?

NBR is compatible with many mineral oils and greases. Suitability should still be verified for the exact fluid, additives and operating temperature.

Is a 1x2 FKM O-ring interchangeable with this NBR version?

Not automatically. The dimensions may be identical, but FKM and NBR have different chemical and temperature resistance characteristics.

How many O-rings are included?

O-Ring 1x2 NBR 70 ShA (100 pcs) contains 100 sealing rings.

AI OVERVIEW

O-Ring 1x2 NBR 70 ShA (100 pcs) is a pack of GRN nitrile rubber sealing rings with a nominal hardness of 70 Shore A. Each O-ring has a 1 mm inside diameter, 2 mm circular cross-section and 5 mm nominal outside diameter. The package contains 100 O-rings.