About TRI

TRI provides Consulting Engineering Services and Manufactured Products that are generally related to solving rotor vibration and bearing damage issues for Rotating Machinery, from the largest to the smallest. TRI also specializes in resolving all types of fluid drive problems. TRI designs and manufactures new mechanical equipment and components including TRI Align-A-Pad® Bearings and large, high powered variable speed fluid drives for electrical generating plants and similar installations.

Since its inception in 1961, TRI has had a very strong and broad analytical engineering foundation. Over the years, TRI has acquired an extensive experience base in the US electrical generation industry. With these capabilities and this experience, TRI personnel are able with great confidence to identify problems in existing equipment, and to design and manufacture hardware solutions to “Take Problems off the Maintenance List.” Additionally, with this experience base of what works and what does not work, TRI is able to design new equipment for both new applications and upgrades that will be very reliable throughout the operating lifetime with a minimum of maintenance.

Almost all of TRI’s services and products are listed on this website, and some are reached on an interactive basis. Please contact TRI for information on any product or service in which you have an interest, whether it is or is not on our website.

TRI’s principal specialty products are Babbitted bearings of all types and variable speed Fluid Drives for boiler feed pumps up to 40,000 hp.

Visit our web site for more information about TRI Transmission & Bearing Corp.


  1. Has TRI ever modified steam turbine tilt pad bearings to dampen subsynchronous vibration induced by steam whirl? Unit in question is a 200MW GE D-11 turbine.

    • TRI has been designing tilting pad bearings to solve sub-sync vibrations of steam turbine rotors for decades, in GE, Westinghouse, and Allis-Chalmers turbine-Generators, with success. We have installed them in steam turbines that previously exhibited steam whirl and the TRI Bearings controlled the sub-sync vibrations. Some of the steam turbines are smaller and some are larger, up to 1250 MW, than the one that you referenced.

      The basis for being able to solve these complex rotor vibration problems is a very sophisticated proprietary rotor-bearing computer simulation program. It has been effective in representing real rotating machines for many years. With this program, bearing designs can be modeled to optimize control of the specific types of vibrations that are occurring.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: