Backed by its unique experience in the bearing field, the NTN-SNR group has developed a range of ball bearings that survive under extreme operating conditions. Indeed, new equipment is often subjected to ever increasing speed and/or operating temperature requirement NTN-SNRs High Temperature range now broadens the technical range of solutions provided to meet the greatest variety of applications
Electric motors, textile machines, ac generators, heating pumps, refrigeration systems, industrial ventilation, Heater units / fan assemblies, Driers, Alternators, Hi temperature ovens and kilns, couplings, dryers, compressors, trucks used in kilns for brick making, in furnaces for the ceramic industry, in rollers in working conditions at elevated temperatures in the steel manufacturing industry, aluminium manufacturing, glass manufacturing, Steel industry, Etc.
Design features.To meet the most stringent requirements, the TOPLINE range benefits from all of SNRs latest technological innovations:
Two possible types of protection:
Seals: highly effective against outside contamination and temperature, with a seal made of viton.
Shields: suitable for higher speeds of rotation, more cost effective
Extreme conditions, extreme controls
Bearing Considerations for High-Temperature Applications
Additional Wear and Tear
Over time, excess heat can change the microstructure of the steel causing a reduction in the estimated life of the bearing. The friction created when a bearing rotates creates heat, which can make an already hot environment even more extreme. The resulting heat can cause a myriad of problems and can change natural wear and tear into unnatural wear, ruining your bearing in the process.
Heat causes metal to expand, which can create warping issues. When the metal in a bearing expands, it can reduce the clearance between the ball and the raceways. This change in clearance can cause the bearing to tighten, which can eventual force it to seize up and fail.
Like the rest of the bearing, seals need to be stabilized to survive extreme temperatures. Traditional rubber seals are only rated for certain temperatures, so extreme temperature can render these seals useless without the proper material or stabilization. This can also cause bearing grease to purge the oil which can and migrate onto other components. Depending on the application, this can be an unwanted side effect, especially if the grease falls onto new products.
As we mentioned before, the natural friction caused by rotation creates heat. Heat stabilized bearings combat this by operating at a lower RPM than their standard bearing counterparts. As a result, you will want to consider the RPMs for your high-temperature bearing options to make sure they match the needs of your applications. Some bearing manufacturers offer multiple versions of the same bearing so that you can pick and choose which temperature range best matches your application.
Find the Right Bearings for Your Applications
Like many types of bearing failure, overheating is avoidable when you choose the right product for your applications. High-temperature bearings allow your applications to operate as they should in extreme environments, saving you from spending time and money on costly maintenance and repairs.