Low friction roller bearings keep machines running longer



Building material manufacturing processes often involve high temperatures and critical stresses.

Cement, tile and brick production processes require hammer mills to grind the aggregates into smaller pieces, and then vibrating screens to classify these crushed particles by size.

Likewise, chipping the wood that goes into plywood laminates involves putting huge logs of wood into chippers, before rolling and cutting the laminate sheets.

All of these processes produce high temperature and fatigue loads which are ultimately supported by the machine bearings.

Michael Grant, Regional General Manager, Timken®, says that the ultimate success in the long life of bearings operating in these extreme environments is determined by their high temperature and vibration performance.

One product that works exceptionally well in this regard is the Timken® spherical roller bearing.

“We call it the coldest bearing in the world because it runs cooler than any other spherical roller in normal applications,” says Grant.

“The Timken® spherical roller bearing has been uniquely designed with features that reduce internal friction, allowing them to perform better in high speed applications or to run cooler at the same speed. “

Specially designed hardened steel cage pockets guide the rollers, eliminating the need for a center guide ring, reducing friction in the bearing. This means that machines have the ability to run at lower operating temperatures or, conversely, to run at higher speeds without worrying about excessive temperature generation in the bearings.

Another advantage of the Timken® spherical roller bearing is the front slots in the cage. This feature facilitates better flow of lubricant through the bearing and facilitates the exit of contamination.

“The higher load capacity due to increased roller size and improved speed capability make them the perfect spherical roller bearings where application speed and high temperature are involved. If you can run your bearing cooler, your lubricant will last longer, which then gives you a better result for the life of the bearings in the machine, ”explains Grant.

Timken® spherical roller bearings are available with steel and brass cage options. While hardened steel cages offer very high wear and fatigue resistance, Grant says brass cage options are well suited for applications involving extreme shock loads and vibration.

“Although we recommend standard hardened steel cage spherical roller bearings for the majority of applications, the brass cage could be a good solution in vibrating machines or where high gravitational forces and minimal lubrication are an issue. For example, Timken® offers specialty spherical roller bearings with brass cages for vibrating screen applications or where centrifugal forces from radial loads and high speed push lubricant out of the bearing, ”he explains.

CBC has a long-standing relationship with Timken® and serves as an authorized distributor for the full line of bearings and bearing components from the manufacturer. CBC’s engineering team works alongside Timken’s technical team to provide 24/7 service to CBC branch customers nationwide across Australia.

Tony Tormey, CBC Industrial Bearings Product Manager, says CBC’s in-depth knowledge of bearing products, combined with Timken® engineering expertise, work together to ensure customers get the best results from their machines.

“When a customer first registers with CBC, a team of CBC specialists visits the customer’s factory to do a full survey of the equipment available to ensure that they can provide the customer with the necessary equipment. best service when needed. Site surveys essentially map factories to understand what machines and components the customer has on site. We note all the rotating equipment on site and analyze the components of the rotating equipment, ”he explains.

Customers can count on the combined expertise of the CBC and Timken® team to resolve any issue, even sometimes before it happens, according to Grant.

“Sometimes customers are not even aware of a problem that exists within their factories. Of course, they don’t have the same product knowledge as we do, and they’re unfamiliar with the potential issues that can arise. We advise the customer on how he can extend the life of his machines. This could be, for example, suggesting a different bearing style or a different housing style, ”he explains.

The CBC-Timken engineering team uses their expertise to offer advice, ranging from how to properly install bearings to best lubrication practices to extend the life of bearings and machines.

“Over-lubrication can sometimes cause as many problems as under-lubrication; especially when high speeds are involved. We’re looking at all of the ways that can help clients achieve better results, ”Grant says.

While Timken® spherical roller bearings have typically been selected to achieve a rated life in most machines of around 100,000 hours – which translates into approximately 10 years of continuous work – Grant says there are many parameters that determine the actual life of a component. .

“Component life will be different for each machine, depending on the environment and the speeds in which they operate, as well as how they are mounted and lubricated. There are so many variables that can change from plant to plant.

“We work hard to make sure customers get the best performance and life from their machines. And the unique characteristics of the Timken® spherical roller bearing allow us to do that, ”he concludes.

Read more articles like this at: www.lets-roll.com.au


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