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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).


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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...

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Deep Dives

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Education Overview

About Us

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


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Volume 18 - Issue 3
Rulon® Materials are Critical for Accurate Lab Fluid Dispensing

Rulon® Materials are Critical for Accurate Lab Fluid Dispensing


TriStar Plastics has a few customers that are utilizing Rulon materials as piston cups in microfluid piston dispensing pumps. These pumps are driven by a rotary shaft with a cam which drives the piston and have no valving — which means the only moving part is the piston.

Critical Lab Requirements Call for Precision Piston Pump Components

A Rulon AR Piston Cup

These types of pumps are primarily used in specialty lab applications where a broad cross section of fluids can be involved and where finite control of flow rates is critical.

Specific examples of the types of fluids being tested include dispensing of organic solvents, acids/bases, and highly corrosive acids including HF (Hydrofluoric).

The pressures are generally low from 10-100 psi, flow rates from 0.4 to 2300 mL/min and speeds from 40-1800 RPM. There are also various additional hardware considerations depending on the end use.

Manufacturers Rely on Rulon Materials for Their Reliability and Chemical Resistance

Rulon AR and Rulon J are the traditional materials used to make formed piston cups, which provide a mechanical sealing surface on the edge of the hydraulic piston heads. The counter-face materials can be ceramic, stainless steel, or carbon fiber.

Rulon products have been successfully used in these types of pump applications for many years because of their reliability, compliance to various hardware conditions and universal chemical resistance for the various fluids involved.

Newer FDA and USPVI Rulon grades are now available for manufacturing piston cups where biocompatibility is required.

Other Applications – Rulon is Also Ideal for Many Other Products Which Utilize Piston Cups

Pumps and compressors of all types and sizes are excellent places for Rulon piston cups including hot glue dispensers, specialty pumps in critical chemical environments like semi-conductor manufacturing, and even the gas pump at your local station.

For nearly any piston or shaft sealing applications in difficult operating conditions TriStar has a Rulon solution! To learn more about the Rulon product line, download our free Rulon White Paper.

Please reach out if you have an application you’d like to run by us.

Do you have a question for our experts?

Rulon White Paper

Read the Rulon Materials Catalog