O-Ring 32x6 NBR 70 Shore DIN 3771

AI Overview

The O-Ring 32x6 mm is a metric sealing ring manufactured from NBR (Nitrile Butadiene Rubber) with a hardness of 70 Shore A in accordance with DIN 3771. It is designed for static sealing and selected low-speed dynamic sealing applications. NBR provides excellent resistance to mineral oils, lubricating greases, fuels and standard hydraulic fluids. Supplied in a convenient pack of 100 pieces, this O-ring is ideal for maintenance departments, OEM manufacturers, machine builders and industrial service companies requiring reliable metric sealing components.

What Makes This Model Different

The 32x6 mm O-Ring features a 6 mm cross-section, providing a larger sealing contact area and dependable sealing performance in demanding industrial applications.

Key features include:

• 32 mm inner diameter
• 6 mm cross-section
• NBR (Nitrile Butadiene Rubber)
• 70 Shore A hardness
• Manufactured according to DIN 3771
• Resistant to mineral oils and lubricating greases
• Pack of 100 pieces

The bulk packaging is ideal for preventive maintenance, production lines and industrial service operations.

Construction and Operating Principle

An O-Ring creates a seal through elastic deformation between two mating surfaces.

When compressed in a correctly machined groove, it fills surface irregularities and creates a leak-tight seal. System pressure further increases the sealing force, improving sealing efficiency.

Reliable sealing depends on:

• correct groove dimensions
• proper compression
• suitable surface finish
• compatibility with the operating medium
• correct installation without twisting or damaging the seal

Material Properties

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

Material characteristics include:

• Excellent resistance to mineral oils
• Good resistance to lubricating greases
• Resistance to hydraulic fluids
• High abrasion resistance
• Good mechanical strength
• Low gas permeability
• Reliable elasticity during operation

NBR is not recommended for prolonged exposure to ozone, UV radiation or strong oxidising agents.

Typical Industrial Applications

Typical applications include:

• Hydraulic cylinders
• Pneumatic cylinders
• Hydraulic valves
• Industrial pumps
• Gearboxes
• Compressors
• Agricultural machinery
• Construction equipment
• Industrial machinery
• Automation systems

Typical Failure Symptoms

Replacement is recommended if any of the following symptoms occur:

• Oil leakage
• Hydraulic pressure loss
• Pneumatic leakage
• Flattened sealing profile
• Cracked elastomer
• Seal extrusion
• Swelling caused by incompatible media
• Permanent compression set

Recommended During Repair

During maintenance it is recommended to inspect:

• Sealing groove condition
• Mating surfaces
• Shaft or piston condition
• Housing cleanliness
• Hydraulic fluid condition
• Lubricant compatibility
• Backup rings
• Installation tools
• Surface damage
• Dimensional tolerances

Technical Specification

Manufacturer: Industrial Standard

Part Number: 32X6 NBR 70 DIN 3771

Type: O-Ring

Design: Metric O-Ring according to DIN 3771

Material: NBR (Nitrile Butadiene Rubber)

Inner Diameter: 32 mm

Cross Section: 6 mm

Hardness: 70 Shore A

Quantity: 100 pcs

Temperature: Suitable for the operating temperature range typical of NBR elastomers.

Application: Hydraulic systems, pneumatic equipment, industrial machinery, agricultural equipment and general mechanical engineering.

OEM Cross References

This O-Ring is manufactured according to the metric dimensions specified in DIN 3771 and may be used wherever the following sealing ring is required:

• O-Ring 32x6 mm
• 32x6 NBR O-Ring
• DIN 3771 O-Ring
• 70 Shore A sealing ring

OEM reference depends on the equipment manufacturer.

Related Components

Frequently serviced together with:

• Hydraulic seals
• Rod seals
• Piston seals
• Backup rings
• Guide rings
• Flat gaskets
• Hydraulic oil
• Pneumatic fittings
• Retaining rings
• Bearing housings

Why B2B Customers Choose This Product

Professional customers commonly select this product for:

• Preventive maintenance
• Hydraulic repairs
• Machine manufacturing
• Equipment rebuilding
• Industrial servicing
• Spare parts inventory
• Fleet maintenance
• OEM production

The 100-piece packaging improves inventory management and helps reduce maintenance downtime.

Professional Industrial Supply

This product is regularly supplied to:

• Maintenance departments
• Industrial workshops
• Hydraulic service companies
• Pneumatic service providers
• Machine manufacturers
• Production plants
• OEM manufacturers
• Industrial distributors
• Engineering companies
• Industrial maintenance contractors

Popular Searches

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FAQ

Is NBR suitable for hydraulic oil?

Yes. NBR is widely used for sealing applications involving mineral-based hydraulic oils and lubricants.

Why is DIN 3771 important?

DIN 3771 defines the standard dimensions for metric O-Rings, ensuring compatibility with standard sealing grooves.

Should the O-Ring be lubricated before installation?

Yes. In most hydraulic and pneumatic applications, a compatible lubricant is recommended to reduce installation damage.

Can a damaged groove cause leakage even with a new O-Ring?

Yes. A worn, scratched or incorrectly machined groove may prevent the seal from performing correctly.

Should the O-Ring be replaced after every disassembly?

Yes. Professional maintenance practice recommends installing a new sealing ring each time a sealed joint is disassembled.