<img height="1" width="1" style="display:none;" src="https://www.facebook.com/tr?id=350476566337084&amp;ev=PageView&amp;noscript=1">

Bearing Materials

TriStar offers a wide range of bearing materials that are ideal for non-lubricated, high-load applications.

Saint Gobain Materials

TriStar is the exclusive partner of Saint Gobain for Rulon materials in North America. 

Materials and Fabrication

Our capabilities include component design, material selection, prototype, production, and manufacturing.

Materials Database

Use our interactive database to search for and compare over 450 materials.


Surface Modification

Learn how our Enhanced Materials Divison (EMD) modifies existing materials to meet specific needs.



Since 1982 we have been combining the skills of TriStar’s engineering team, our extensive product line, and our deep understanding of a broad range of industries to bring you solutions to your most challenging engineering needs.

Problems / Solutions

Explore the common causes of bearing failure and learn how advanced polymer and composite bearings can address them.

Application Case Studies

Enhanced Materials Division (EMD)

EMD  positions TriStar Plastics as the leading resource to solve your demanding engineering material challenges.

Enhanced Materials Division (EMD)


View our library of engineering worksheets — the quickest way to communicate your project specs — or reach out to our engineering team.


Here are a few of our most popular online engineering tools - including our PV calc and material database (450+ materials).


Learn about our quality program and view our current ISO cert.


Technical Library

Our collection of case studies, product specs, brochures and other key technical documents.

Free White Papers

Our library of free-to-download white papers focus on industry-based solutions, specific materials, bearing design, and more...

All White Papers

Deep Dives

These pillar pages provide in-depth information on bearings and problem/solutions for specific industires.

All Pillar Pages

More Resources

Our popular resources, including our monthly newsletters, blog, and our video library.

Education Overview


TriStar Plastics Corp. Webstore

Customer Portal

TriStar Plastics Corp. Customer Portal
Portal Features
Request Portal Authorization Code

About Us

TriStar Plastics Corp. provides engineering, custom fabrication and manufacturing of high-performance plastics and self-lubricating bearing materials. 


We're dedicated to building a company where opportunities exist for talented people to achieve their maximum potential.

Let's Go Paperless...

To save time, paper & postage please sign up for paperless invoicing and payments.

Contact Us

Go here to request a quote or for general questions (document requests, billing inquiries, etc.).


Ask the Expert

Have a material or application question for our engineering team? Want to send us a file for review? Go here.


Let's Go Paperless

In an effort to save time, paper and postage please sign up for our paperless invoicing and payments.


Meldin® 7021 | 15% Graphite Filler

Meldin® 7021



Meldin® 7021 features a 15% (by weight) graphite self-lubricating filler encaspulated by the base polyimide resin.

This material has a low coefficient of friction and high heat resistance, making it an excellent choice for high temperature bearings, seals, thrust washers and other low-wear applications.

Meldin® 7021 provides consistent mechanical and performance properties for aircraft airframe systems such as landing gear and fuselage components, as well as jet engine parts such as pads, bumpers, washers, seals, and bearings.


Need More Info about Meldin® 7021?

Ask a Question or Request a Quote


Thermoset Polyimide with 15% by Weight Graphite Filler




Best for service in vacuum and in extreme dry conditions

Working Temperature Range -423°F to +600°F [-253°C to +315°C]
Manufacturing Methods Isostatic molded
Direct formed
Compression molded
Shape Availability Rod (up to 37")
Sheet (12"x12")
Finished parts
Tubes, discs, blocks

Agency Approvals

Meets ASTM D6456-99 Type 2, Class 1
Meets AMS3644 class 2
Meets Mil-R-46198 Type 2, Class 1(superceeded)
Meets Honeywell MCS5016 Type 2, Class 1
Meets Rolls Royce MSRR9206
Replaces Vespel® SP-21

Vespel is a Registered Trademark of DuPont Polymers, Inc.