NBR Oil Seal

NBR Oil Seals for Automotive and Industrial Fluid Sealing

Independence Seal specializes in manufacturing custom NBR seals, combining steel and a lip element. Our steel options include mild (CRS) steel and 304 stainless steel, with NBR (nitrile rubber) as the standard lip material. Our seals offer exceptional durability and resistance to various oils and chemicals. Tailored solutions ensure optimal performance for diverse industrial applications.

NNK supply professional and honest service.

About NBR (Nitrile Butadiene Rubber)

NBR belongs to a family of unsaturated synthetic rubbers known for their robustness and versatility. The unique composition of NBR, which can be adjusted by varying the acrylonitrile content, provides it with a range of physical and chemical properties that make it ideal for sealing applications.

If you are looking for more details, kindly visit NBR OIL SEAL.

Properties of NBR (Nitrile Butadiene Rubber)

• Operating Temperature Range: -20°F to 200°F (can withstand up to 300°F for a short duration)
• Resistance:
  • Excellent resistance to most mineral oils and greases with a mineral oil base
  • Resistant to gasoline, diesel, light heating oil, animal and vegetable oils, and fats
  • Resistant to hot water
• Mechanical Properties:
  • Poor resistance to ozone and impact
  • Very good abrasion resistance
• Hardness:
  • Standard: 75 durometer
  • H1 variant: 85 durometer

Material Datasheet

Benefits of NBR (Nitrile Butadiene Rubber):

The numerous benefits of NBR make it a preferred material for oil seals:

• Strong Engineering Properties: The robustness and durability of NBR ensure reliable sealing performance in demanding applications.
• Versatile Applications: NBR oil seals are used in hydraulic systems, gas and oil environments, silicone oil systems, and with animal and vegetable oils and fats, as well as in both hot and cold water systems.
• Customizable: The ability to compound NBR for specific needs allows for enhanced performance tailored to particular applications, such as improved aging, flame resistance, and ozone resistance when compounded with PVC.
• Food and Pharmaceutical Suitability: Special potable water (WRC/WRAS) compounds of NBR are safe for use in the food and pharmaceutical industries.
• Military Specifications: NBR-based compounds are used to create fuel and oil-resistant O-rings that meet various military standards.
• Oil Resistance: Seals with high acrylonitrile content offer superior oil resistance, while those with low acrylonitrile content provide better low-temperature flexibility and resilience.
• Low-Temperature Performance: Special low-temperature NBR compounds are available for use with mineral oil-based fluids, ensuring optimal performance in cold environments.

Elevate Performance with Independence Seal’s Premium NBR Oil Seals

Nitrile Butadiene Rubber (NBR) oil seals from Independence Seal offer exceptional performance across a wide range of applications, making them a critical component in automotive, industrial, and agricultural equipment. Their benefits include superior oil resistance, durability, wide temperature tolerance, and cost-effectiveness, ensuring reliable sealing in various demanding environments. Whether you’re dealing with high temperatures, aggressive chemicals, or standard lubricants, NBR oil seals from Independence Seal provide a robust and versatile solution to maintain the efficiency and integrity of your machinery.

Contact us to discuss your requirements of NBR Rubber OIL SEAL. Our experienced sales team can help you identify the options that best suit your needs.

Whenever I buy seals from Stihl, they're always TB seals. Whenever I buy seals from the local seal supplier they’re always TC. Besides the obvious that one is metal outer and the other is rubber coated metal - for the application in OPE, is there any real advantage of one of the two designs?

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Whenever I buy seals from Stihl, they're always TB seals. Whenever I buy seals from the local seal supplier they’re always TC. Besides the obvious that one is metal outer and the other is rubber coated metal - for the application in OPE, is there any real advantage of one of the two designs?

Reference:
View attachment View attachment

Tom I like the OD rubber coated one due to the positive sealing
quality of the seal pocket to seal interface of the neoprean I'm wondering this same issue too. My current project old Jonsered 535 had TB style oil seals and the ones I managed to buy are TC.
The reason for TB may even be easier or more forgiving installation during saw manufacturing process. Rubber coated ones you can not just hammer in, you got to have suitable tool to press them in evenly. Just my wild guess though.
What comes to other properties these rubber coated types are used in 2 stroke motorbikes with double HP per CC so I do not see an issue there either. Future will tell...

Any decent bearing, belt and seal company should be able to get you either version.
Having said that, I've seen both versions from the oem, especially on clam shell models. The tc seals better and takes bore deflection thrn thr to style. In reality you shouldn't need any sealant on any seal, even though most (including myself) tend to give the od a little smear for insurance.

It’s been such a long time since doing a clam shell and got OEM seals that I totally forgot that they had rubber coating, thanks for the reminder. Rubber coatings tend to harden or even shrink over time. They are easier to press in with less effort because the rubber deforms, I can often push them in with my bare hands. The rubber coated versions seal better in spots that have some corrosion, scratches, oil sludge, carbon buildup etc. I prefer this style for replacement when the engine or transmission is not disassembled, washed or being unable to use a proper seal driver or press.
Meatal clad seals are the stronger longer lasting version, they are less likely to pop out and seal better against the case by a stronger interference fit with the drawback of metal corrosion or dissimilar metal reactions if the seal coating is damaged. You should use a properly sized installation driver or press to install these straight and to the correct depth without distorting the seals outward metal face or the sealing lip will be distorted.
Some like to use sealants, I do not because the sealant may not bond to the case or the seal creating a leak, the sealant may not expand/contract at the same rate as the rubber or metal seals exterior causing a leak or even seal movement/looseness/dislodging. Lock tite for seals may be used to help overcome case damage or bore size irregularities to the available seals, thankfully I have not yet needed to use this personally...but life throws curveballs at every at bat it seems. The ability of a sealant to bond may have zero bearing on performance.
Teflon tape is a common "sealant" which bonds to absolutely nothing but is vital to the assembly of so many fittings.
RTV is the complete opposite, you might catch me "tooling" it in with a bit of emery cloth to guarantee adhesion.
In general, I prefer TB to TC, since seeing a few TC types which could be spun in the bore. Then again, they were quite old and tech has moved.
I'm surprised no one has brought up the types of 'rubber' listed by OP, as the properties vary so widely.

The ability of a sealant to bond may have zero bearing on performance, Teflon tape is a common "sealant" which bonds to absolutely nothing but is vital to the assembly of so many fittings. RTV is the complete opposite, you might catch me "tooling" it in with a bit of emery cloth to guarantee adhesion.
In general, I prefer TB to TC, since seeing a few TC types which could be spun in the bore. Then again, they were quite old and tech has moved.
I'm surprised no one has brought up the types of 'rubber' listed by OP, as the properties vary so widely.

I have only used Viton and nitrile.