Archive for the ‘Bearings’ Category

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Top 5 Causes of Bearing Failures

December 6, 2016

There are many reasons why bearings fail. Over the years, TRI has been involved many repairs. TRI has published a list of the top 5 problems that lead to hydrodynamic bearing failures and how to avoid these pitfalls.

top-5-graphic

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Babbitt Casting Animation

November 14, 2016

A new animation showing the centrifugal Babbitt caster at TRI Transmission & Bearing Corp. has been added to YouTube.

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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.

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Tilt Pad Bearing Assembly

April 29, 2016

TRI has released a new video showing the assembly of a simple tilt pad bearing.

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Lift Oil Pumping System

March 21, 2016

TRI has recently completed a pair of lift oil pumping skids. They will produce 5 gallons per minute at 3000 p.s.i. The system will reduce the wear on bearings when the unit is on turning gear. The lift oil will also reduce the load on the turning gear and turning motor.

LiftOilSystem

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Minimizing Porosity in Rebabbitted Bearings

February 29, 2012

There are various ways to rebabbitt a bearing that has been in service previously, among them are centrifugal casting, static casting, and hand welding. Each one has advantages and disadvantages. The choice used depends, in part, on the material composition of the bearing backing material.

Some of the most difficult applications to rebabbitt are cast iron fan bearings that have water jackets. Essentially, these bearings have two walls to consider, an outside wall and an inside wall.

There are various concerns with these bearings.

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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.