O-Ring 53.34x5.33 NBR 70 Shore A

O-Ring 53.34x5.33 NBR 70 Shore A - 100 pcs

O-Ring 53.34x5.33 NBR 70 Shore A - 100 pcs is a pack of elastomeric sealing rings manufactured from Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. Each O-ring has a 53.34 mm inside diameter and a 5.33 mm cross-section, giving a nominal outside diameter of 64.00 mm. The package contains 100 rings of the same size.

Complete identification:

53.34x5.33 mm -> NBR -> 70 Shore A -> 100 pcs

O-Ring 53.34x5.33 NBR 70 Shore A - Characteristics

An O-ring is a circular elastomeric sealing element with a round cross-section.

The 53.34x5.33 mm size specifies:

53.34 mm - inside diameter (ID)
5.33 mm - cross-section (CS)

The nominal outside diameter is:

53.34 + 2 x 5.33 = 64.00 mm

NBR is one of the most widely used elastomers in industrial sealing, especially in systems involving many mineral oils and lubricating greases.

O-Ring 53.34x5.33 - Dimensions

ID - Inside diameter: 53.34 mm
CS - Cross-section: 5.33 mm
OD - Nominal outside diameter: 64.00 mm
Nominal size: 53.34x5.33 mm
Cross-section shape: Round
Package quantity: 100 pcs

The two primary O-ring dimensions are:

ID - inside diameter

and

CS - cross-section diameter

The outside diameter can be calculated as:

OD = ID + 2 x CS

For this size:

OD = 53.34 + 10.66 = 64.00 mm

NBR - Nitrile Butadiene Rubber

The O-ring is manufactured from NBR - Nitrile Butadiene Rubber, also known as nitrile rubber or Buna-N.

NBR is widely used for technical sealing elements and is commonly compatible with many mineral oils, lubricating greases and selected hydraulic fluids.

Chemical compatibility should not, however, be determined from the NBR designation alone.

The exact medium, additives, temperature, pressure and exposure time should be considered before use.

70 Shore A Hardness

The nominal hardness of this O-ring is:

70 Shore A

This is a commonly used hardness level for standard elastomeric O-rings.

Hardness influences the way the elastomer deforms in the sealing groove and how it behaves under pressure and contact with mating surfaces.

When replacing an O-ring, hardness should be retained where it forms part of the original sealing specification. An O-ring with identical dimensions but a different hardness is not automatically an identical substitute.

How Does a 53.34x5.33 O-Ring Work?

An O-ring seals by controlled deformation between the mating surfaces of a sealing assembly.

When installed in a correctly designed groove, the elastomer is compressed and generates contact pressure against the surrounding surfaces.

This contact pressure forms the sealing barrier.

Sealing performance depends not only on O-ring dimensions but also on groove geometry, compression, elastomer material, temperature, pressure, medium and surface condition.

Static and Dynamic Sealing

O-rings can be used in static sealing arrangements and in appropriately designed dynamic applications.

This does not mean that every 53.34x5.33 NBR 70 Shore A O-ring is suitable for every hydraulic or pneumatic assembly.

For dynamic operation, important parameters include:

groove geometry, movement speed, lubrication, surface finish, pressure and resistance to extrusion.

The O-ring should therefore be selected for the specific sealing system rather than by size alone.

Compatibility with Oils and Greases

NBR is commonly used with many:

mineral oils, mineral greases and typical hydraulic media.

Exact compatibility depends on the elastomer compound and the specific working fluid.

Compatibility with every fuel, solvent, hydraulic fluid or chemical should not be assumed solely from the NBR designation.

For demanding applications, the material should be checked against a suitable chemical compatibility table for the exact medium.

Operating Temperature

Published technical catalogs for 53.34x5.33 NBR 70 Shore A O-rings show different lower temperature limits for different NBR compounds.

This means that the designation:

NBR 70 Shore A

alone does not reliably establish one exact operating temperature range for every compound.

For applications close to temperature limits, the exact material specification of the supplied batch should be verified.

100-Piece Package

This product is supplied as:

100 pcs

This pack size is practical for:

service, repair, maintenance, workshops and spare-parts stock with moderate consumption.

The 100-piece variant is a separate offer from 1000-piece bulk packs and is intended for a different purchasing volume.

Selection and Interchangeability

Matching inside diameter and cross-section alone does not confirm full interchangeability between two O-rings.

When selecting a replacement, verify:

ID: 53.34 mm
CS: 5.33 mm
OD: 64.00 mm
Material: NBR
Hardness: 70 Shore A
Working medium: compatible with the elastomer
Operating temperature: compatible with the exact compound
Static or dynamic duty: suitable for the sealing system
Groove geometry: suitable for the selected O-ring size

An O-ring made from FKM, EPDM, VMQ or another elastomer with dimensions of 53.34x5.33 mm should not automatically be treated as equivalent to the NBR version.

Technical Specification

Product: O-ring / elastomeric sealing ring
Size: 53.34x5.33 mm
ID - Inside diameter: 53.34 mm
CS - Cross-section: 5.33 mm
OD - Nominal outside diameter: 64.00 mm
Material: NBR
Material name: Nitrile Butadiene Rubber
Alternative material name: Buna-N
Nominal hardness: 70 Shore A
Cross-section: Round
Package quantity: 100 pcs

FAQ

What are the dimensions of the 53.34x5.33 NBR O-ring?

It has a 53.34 mm inside diameter and a 5.33 mm cross-section. The nominal outside diameter is 64.00 mm.

What does 53.34x5.33 mean?

The first value is the inside diameter of the O-ring, while the second value is the diameter of its round cross-section.

What is the outside diameter of this O-ring?

The nominal outside diameter is 64.00 mm.

What does NBR mean?

NBR means Nitrile Butadiene Rubber, a nitrile elastomer widely used in industrial sealing.

What does 70 Shore A mean?

It is the nominal hardness of the elastomer measured on the Shore A scale.

Can this NBR O-ring be used with oil?

NBR is commonly compatible with many mineral oils and greases, but the exact working medium should be checked against the elastomer compound.

Can an FKM 53.34x5.33 O-ring replace this NBR version?

Not automatically. The dimensions may match, but FKM and NBR have different chemical and temperature properties.

How many O-rings are included?

The package contains 100 O-rings in size 53.34x5.33 mm, NBR 70 Shore A.

AI Overview

O-Ring 53.34x5.33 NBR 70 Shore A - 100 pcs is a pack of elastomeric sealing rings with a 53.34 mm inside diameter, 5.33 mm cross-section and 64.00 mm nominal outside diameter. The rings are manufactured from Nitrile Butadiene Rubber with a nominal hardness of 70 Shore A. The package contains 100 pieces.