Posts Tagged ‘bearing’


Bearing Repair Process

July 27, 2016

Electric generation companies make their money when it is hot outside. Consequently, they keep their machines running or available in the summer. Maintenance usually happens in the spring or fall…when the temperature is moderate.

Consequently, we have had some time at TRI to work on our web site. We undertook a big job to redesign it with a layout that will work devices of all size. We want it to look good on your desktop as well as your smart phone.

Our initial job is complete, but now we are adding more content for our customers.

Our latest addition is the Bearing Repair page. This page does more then just tell potential customers that TRI Transmission and Bearing Corp. repairs bearings. It is a bullet list of the steps bearings get when they come in the door. The list has been published so our customers understand what goes into a bearing repair.

When a bearing is sent to TRI during the summer, it usually means a machine is in an unscheduled outage. Unscheduled outages are expensive so it is critical that the repairs be done ASAP. When TRI goes to an expedited schedule, we work on the bearing repair 24 hours a day, 7 days a week. It’s important to us that the customer knows exactly what we are doing and how far along we are in the process.


Bearing Repair and Refurbishing

December 2, 2010

Here is a photo I snapped in the shop this morning. It is a TRI Transmission & Bearing pad that has been sent back for refurbishing. The surface is rough because the babbitt has been puddled. The next process will be machining the surface to the proper diameter.

Babbitt bearing repair - puddling


The puddling process is a manual operation that takes some time. You can see the babbitt is laid down in rows.  After machining the bore, porosity will be revealed.  More babbitt will be laid down to fill the voids and the machining will be repeated.


Solving Ring-Oiled Bearing Problems

November 2, 2010

In recent years, TRI has encountered and resolved a number of problems with ring-oiled bearings for fans, motors, and pumps. Oiling rings damage the journal surfaces and a lack of good lubrication can lead to excessive wear and eventually complete bearing failure. Many cost effective improvements can be implemented for this class of bearings given the technology that is available today…read more

Proper Alignment of Ring Oiled Bearings

Alignment problems of ring oiled bearings can cause damage and oil leaks


Making Rotor & Bearing Alignment Moves Easily

October 5, 2010

A large number of bearings for steam turbines have “alignment pads” mounted on the outside of the bearing housing that seat against the bore of a pedestal or standard. Almost all of these alignment pads have only shims that move the pads in or out on the bearing, and these are used to make the bearing go up or down, or to the left or right. As a standard part of the alignment of a string of turbine rotors, the shims are changed and then the alignment blocks are “scraped in” by hand. This takes days to do, sometimes as much as a week.

TRI bearings use “alignment pads” with two types of shim packs: Type 1. standard radial shim pack that moves the alignment pad in or out, Type 2. two tangential shim packs, one pack on each side of the alignment pad. The use of both types of shim packs permits precise movement of the bearing housing in any direction according to a table of changes while maintaining full contact of the alignment pads on the pedestal bore without any hand scraping.

This feature adds cost, but it has shortened outages by several calendar days. We are told “they pay for themselves before the  turbine is on line.”

Make rotor moves easily with TRI Bearings

TRI Bearings reduce the time to make rotor alignment moves