Vespel Rings | Aero-Plastics

To machine Vespel correctly, there are a few requirements. Having the knowledge and confidence to properly machine Vespel is vital, as is using specific manufacturing processes. For many companies, the machine Vespel process can be costly, particularly without the right skills or experience to correctly do so.

Vespel tends to have good machinability characteristics, and it’s an excellent material for manufacturing due to its properties.

Applications using Vespel commonly require very tight tolerance features that are not only challenging to machine, but also measure. Our High-Res vision system allows for a highly accurate inspection process to ensure everything is of the best possible quality.

What are the Common Types of Machined Vespel Used in Manufacturing?

There are several types of machined Vespel used in manufacturing for a variety of applications, such as: 

  • Vespel SP-1
  • Vespel SP-21
  • Vespel SP-3
  • Vespel SP211
  • Vespel SP22
  • Vespel SP3
  • Vespel SCP5000
  • Vespel SCP50094
  • Vespel CR6100
  • Vespel SP202
  • Vespel ST2010
  • Vespel ST2030
Vespel Machining | Aero-Plastics

Vespel SP 1

Dupont Vespel SP1 is a highly durable polyimide that offers excellent wear resistance and insulation. Vespel SP1 is the best choice if you’re looking for durability with your products.

Vespel SP 3

Mostly used in vacuum and dry environments, Vespel Sp3 is known for its ultra-low outgassing. It is most commonly used for niche industries such as aerospace due to these properties.

Vespel SP 21

If you prioritize low-friction properties, Dupont Vespel SP21 is the most suitable option for you.It can handle wear and tear. Due to graphite enhancements, it offers long-term thermal stability and performance with or without lubrication.

Vespel SP 22

Vespel SP22 is another common type of Machine Vespel used in situations where tight tolerances are part of the design. Offering minimal thermal expansion, it has dimensional stability that is a lot more flexible for manufacturing due to its graphite enhancements.

What are the Properties of Vespel?

Vespel is a polyimide-based plastic material with a highly ordered molecular structure. It is known for its high-performance and ability to withstand temperature ranges.

It is resistant to wear and chemicals, making it a suitable option for those seeking durability. It also offers mechanical and insulation properties and does not produce outgassing when subjected to high temperatures. It does not melt either, making it one of the best solutions for high-quality manufacturing.

Material Properties

Key properties include:

  • Ability to withstand high temperatures
  • Chemical-resistant
  • Low outgassing
  • Lubricity

Thermoplastics vs Thermosets

Polymers are available in two categories

  • Thermoplastics
  • Thermosets

The main difference between thermoplastics and thermosets is in how they are handled. Thermosets are a material that gains strength when heated. However, once heated, they cannot be remolded, reheated, or cooled and cannot be softened.

A thermoplastic, on the other hand, can be remolded, reheated, or cooled, without causing any chemical changes. Thermoplastics can be softened, or hardened repeatedly.

Vespel is a thermoplastic, which means it can be melted in the heat and can be used in high-heat, low-wear, and low-friction applications.

Applications of Vespel Plastic

Due to its properties, vespel plastic is used across many different industries. This includes aerospace, semiconductor, and transportation industries – particularly in challenging conditions. The reason why Vespel plastic can be used in so many industries is because of its ability to withstand high heat, its low-wear, and low-friction properties.

Even under ultra-high-stress testing, no outgassing occurs with Vespel plastic, making it ideal for dry and vacuum options such as aerospace. The low-wear and low-friction properties make it easier for application in industries such as semiconductors and automotive where tight-tolerance and other specifications need to be considered.

Vespel is used in applications such as:

  • Insulators
  • Valve seats
  • Balls
  • Gaskets
  • Poppets
  • Wafer clamping
  • Clamping rings
  • In-chamber semiconductor parts
  • Thrust washers
  • Seal rings
  • Bearings
  • Piston Rings


  • Oil and gas
  • Space
  • Semiconductor
  • Automotive

Frequently Asked Questions About Vespel

Vespel is not always the easiest material to work with. As mentioned before, it can be costly and the right knowledge is needed to work with this material.

There is not a lot of information out there about Vespel, which makes it challenging to ascertain whether it’s the right material choice for your manufacturing needs.

Most types of Vespel cannot be injection molded because they are difficult to manufacture into complex shapes.

However, many of the Vespel TP-8000 Series components are suitable for fabrication by injection molding.

Vespel is pricier compared to other engineering plastics due to its high-performing properties

Vespel is made from polyimide-based plastic material

Melden is an alternative to Vespel.

Our services include a rapid response option for those who need parts right away. If you require Vespel parts that need to be made within a tight turnaround time, please get in touch with us.