EMD (Enhanced Materials Division)

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2 min read

Rulon AR and Rulon LR: Back to Basics

By Dave Biering on May 19, 2015

Rulon AR and Rulon LR:  Back to Basics

I’ve just returned from a few days of customer site visits, which is always a great experience. I enjoy touring the manufacturing plants and learning more about our customers and their bearing challenges. On this trip I was asked about Rulon AR and Rulon LR, two of the over 300 different formulas of Rulon bearing materials. Our customer had some old design prints on file, and could not find the original Rulon formulas specified on the prints. Turns out, their old designs specified Rulon A and Rulon LD; materials that are no longer in production, here’s what we reviewed:

Our client had been using Rulon A and Rulon LD; two of the original Rulon compounds that were in widespread use from 1950s through the mid-1980s. The materials (both maroon in color,) were actually remanufactured and renamed by Dixon in 1988; Rulon A became AR and Rulon LD became LR. At that time, it was discovered that a constituent of the maroon pigment was carcinogenic, so the necessary formulation changes were made. 

Although the formula changed nearly thirty years ago, the materials have retained their self-lubricating properties to deliver excellent wear and friction, plus their signature maroon color. In fact, both are NASA approved for use in LOX service.

Rulon AR 

The primary application is a seal or gasket material because it is flexible and responsive. Rulon AR is ideal for seals and the bonded coatings of slide surfaces. AR excels in automotive applications such as shaft seals and piston cups for gas meters, or anywhere where high physical properties are required.

Rulon LR

Is the go-to material for general purpose Rulon applications. Since the material is stiffer and has good deformation resistance it’s excellent for bearing or structural components.

Both Rulon AR and LR are versatile design materials with extremely low outgassing in vacuum service. They require a minimum 35RC hardness on mating hardware due to the abrasive nature of the filler and are available in rod, sheet, tube and Rulon tape. 

Here’s a handy Rulon comparison chart to help you review the exact specification of these unique materials. Have a question for our Experts? Submit them here! We’re happy to help!

Topics: Rulon LR Rulon AR
1 min read

Rulon Reels In Custom Fishing Components

By Dave Biering on August 28, 2014

Rulon Reels In Custom Fishing ComponentsHere’s a fishing tale about the one that didn’t get away! 

Our team worked with a high-end fishing manufacturer to design a whole new reel drag system. The drag is actually a slip-clutch assembly that allows the line to move freely under the pressure of a sudden hook or the pull of a large fish ― basically keeping the fish engaged while the line is hauled in. 

Why did we choose Rulon LR and Rulon J formulas for this unique clutch application? It all came down to matching the right compounds to the right surface materials.

The new clutch devices incorporate carbon composite bushings for the drag pin and drag washers. With this combination of Rulon materials, the reel now produces a very efficient and smooth transition during drag adjustments. Rulon has helped to increase the drag response time, given longer wear life and provided a competitive value.

Since this initial reel development, our Surface Modification team has also worked with other high-end manufacturers to bond washers to the reel’s metal substrates. 

An added bonus is that Rulon is a self-lubricating material that eliminates the need for manual greasing for the lifetime of the product

Ever wonder if the Rulon material that you have purchased is the “reel” deal? Get your free copy of our technical paper, How to Recognize Genune and Avoid Counterfeit! Or just Ask an Expert!

Topics: Rulon J Surface Modification Rulon LR