EMD (Enhanced Materials Division)

Enhanced Materials Division (EMD)

Get in Touch

Contact Us

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

Ask the Expert

Have a material or application question for our engineering team? Go here.
Ask Away

Let's Go Paperless

In an effort to save time, paper and postage please sign up for our paperless invoicing and payments.
Sign Up
1 min read

Plane bearings for a wet environment

By Dave Biering on September 22, 2010

Over the summer — at the height of boating season — I was asked how to choose the right bearing for use in a wet environment.  As a whole, plastics do not do well in wet applications; most traditional polymers tend to absorb moisture and saturation. Nylon materials, for instance, are susceptible to humidity and swelling issues.  Even those polymers that do well in water can usually withstand freshwater only, not saltwater. 

So what are your bearing choices for a wet environment application?  Polyesters and Acetron materials hold up well.  And our marine clients have done extremely well with Ultracomp for their rudder bearings, since they are durable and excel in linear, oscillating and rotary applications.  Our CJ product line is another good choice, since they remain dimensionally stable in liquid.  No matter what material you choose, we recommend that you avoid graphite, because it gives a cathodic charge in saltwater.

Very few PTFE-based materials excel in water, but we can help you find the right one for you freshwater, saltwater, DI, or chemical blend submerged applications.
Topics: Material Selection CJ Bearings Ultracomp Marine