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Bearings with Timken Shaft Guarding Technology May 15, 2016

Posted by Bradley Irwin on May 13, 2016

Timken’s Shaft Guarding Technology™ helps to prolong shaft life, while at the same time, providing for easy installation and removal of standard setscrew units.

Here is a video in the automotive industry showing how to remove and install a bearing with Timken’s technology.

After you preview the video, you can learn more about Shaft Guarding Technology here.

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Last modified on May 3, 2016

Categories: Bearings

Tags: Shaft Guarding Technology, The Timken Company, Timken, Timken Bearings

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5 Types Of Materials Commonly Used To Make O-Rings May 9, 2016

Posted by Bradley Irwin on May 6, 2016

O-rings are a common type of seal used in various manufacturing industries.

Due to their simple production, cost, pressure resistance, and easy installation, they have found their way into many common products including engines and vehicles. The aerospace industry has also put them to good use in different types of rockets.

O-rings work in many different applications since they have a diverse range of materials used in their fabrication.

What Are They Made Of?

Many O-rings are made elastomers or elastic polymers popularly known as rubber. The polymers are cured through the process of vulcanization thus resulting in a more elastic, strong, and durable rubber.

Different materials have different properties, and some will be more elastic while other are more tear resistant along with other qualities.

Due to the diverse range of materials available, determining the best one for a project can be difficult. While contractors and designers can help in making the decision, various deficiencies and efficiencies can influence or guide the decision.

The following are some of the materials used to manufacture O-rings.

1. Nitrile (Buna-N)

Nitrile is best suited for general-purpose seals such as water, petroleum oils, and some hydraulic fluids. This material is resistant against abrasive treatment and tears.

On the other hand, this material can have problems with ketones, automotive brake fluid, nitro and halogenated hydrocarbons, as well as phosphate ester hydraulic fluids.

2. Ethylene Propylene Rubber (EPR)

EPR O-rings work particularly well with hydraulic fluids as well as brake fluids, silicone oils, water, steam, and alcohols.

EPR is, however, not suited for a wide variety of applications because of wear and tear concerns.

3. Fluorocarbon (Viton)

This is an all-round material, which can handle various different applications, especially assorted sealing jobs that require movement. It is also suited for silicone fluids and gases, petroleum oils, acids, as well as some halogenated hydrocarbons including carbon tetrachloride.

Fluorocarbon O-rings are not recommended for hydraulic fluids and hot hydrofluoric acids.

4. Neoprene

This material can seal refrigerants in air conditioner and refrigeration units as well as petrol oils.

Neoprene products often contain lead-based agents thus making them hazardous to human health. In addition, some people are allergic to it.

5. Polyurethane

This material has extrusion and abrasion resistance and general toughness.

However, polyurethane, is not suited for applications that require heat resistance and good compression.

These are five of the common types of materials used to make O-rings. If you are in the market, this information may help guide your selection.

Last modified on May 3, 2016

Categories: Seals

Tags: epr, ethylene, fluorocarbon, neoprene, nitrile, o-ring seals, polyurethane

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Categories: Bearings

Ball Bearing Problems And Avoidance May 1, 2016

Posted by Bradley Irwin on April 29, 2016

The accurate diagnosis of ball bearing failure is important to prevent repeat failures and additional expenses.

Ball bearings are found in a vast majority of machinery applications today. These bearings are quite reliable even under the toughest of conditions. They have quite a substantial service life under normal operating conditions.

The latest research shows that only one percent of ball bearings do not reach their expected service life.

This shows that when a ball bearing fails prematurely, it is largely due to a cause that could have been avoided in the first place.

Most ball bearing failures such as spalling, pitting, flaking, skewing, creeping, corrosion, rust, and unusual wear patterns are all caused by a relatively small group of causes.

These causes are usually interrelated and correctable at the same time.

Some of the main causes of ball bearing failure include mounting, installation, operational stress, environmental influence, and the bearing selection.

The Importance of Lubrication

Proper lubrication is extremely important to enhance the service life of the ball bearing. It helps cover the rolling and sliding surfaces with a thin oil film to avoid direct metal-to-metal contact.

This will help reduce the abrasion and friction, and enhances the service life of the ball bearing.

Grease is used to lubricate the surfaces because it is easy to handle and helps simplify the sealing system.

Oil is a good lubricant for high-temperature or high-speed operations.

Lubricant failures may occur due to several reasons such as using the wrong lubricant, using too much grease or oil, using too little grease or oil, mixing grease and oil, or using contaminated grease/oil.

Make Sure They Are Properly Installed

The mounting and installation process is another area that can lead to bearing failures.

It is critical to use the proper tools during the mounting and installation process.

Misalignment and shaft deflections should be minimized to prolong the service life of the ball bearing.

Operational stress is another cause of bearing failures.

Usually, factors within large applications can change at any time. If the loads become too high, overloading and early stress can result.

Likewise, if the loads become too low, skidding may occur. Unusual noises and increased temperatures are the first signs of such issues. This is how operational stresses in the application can affect the life of the ball bearings.

Overcome these problems and you will get the maximum life out of each bearing!

Last modified on April 11, 2016

Categories: Bearings

Tags: ball bearings, bearing installation, lubrication

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