PTFE Products
Pure PTFE product includes sheets,rods,tube,tapes and gaskets etc.,they are molded, skived or cut from 100% virgin PTFE.It has the best chemical corrosion resistance among known plastics,without being aging.lowest friction coefficient,wear resistance.the unloaded operating temperature range is -180-+260c.
The filled PTFE products are molded PTFE resin mixed with the most frequently used filler materials such as glass fiber , carbon fiber and etc.the filled PTFE has improved compression strength, better abrasion resistance,high thermal conductivity and lower thermal expansion compared with pure PTFE products.
Application: Sealing materials ,electrical insulating parts ,lining,oil less lubricating materials etc.
PTFE sheet and gasket Hengshui Aohong Technology Co.,Ltd. , https://www.aohong-sealing.com
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Bearings, much like humans, have to manage stress. When selecting a bearing, it’s crucial to ensure that it doesn’t become overwhelmed by the load it must bear. In simpler terms, it’s essential to verify that the bearing’s load capacity can comfortably handle the weight it will encounter.
If a load exceeds the bearing’s capacity, it could lead to accelerated wear and tear or even permanent deformation, drastically shortening its lifespan. When choosing a bearing, there are two primary types of stress to consider: static and dynamic.
Static stress doesn’t always mean the load remains stationary—it refers to the condition of the bearing itself. This type of stress arises when a load, whether consistent or fluctuating, is placed on a bearing that is either still or moving very slowly. A heavy load can cause the rolling surfaces to deform plastically and may even flatten the rolling components, leading to an early and catastrophic end for the bearing.
Dynamic stress, conversely, pertains to the movement of the bearing, not the load. This occurs when a load, whether constant or variable, is applied to a bearing in motion. If the load surpasses the bearing’s capacity, it will accelerate fatigue, causing cracks and flaking in vulnerable areas. Ultimately, this results in failure due to material fatigue—a bearing's worst-case scenario.
Three theories attempt to explain the causes of fatigue-induced failure. The maximum shear stress theory posits that the primary factor is the highest shear stress experienced by the bearing. The distortion theory suggests that stress across a broader area, rather than at a single point, triggers fatigue. Lastly, the alternating shear stress theory argues that the perpendicular stresses on the bearing are responsible for material fatigue.
While each theory has its merits, the alternating shear stress theory is widely adopted for determining the fatigue life of rolling bearings. The fatigue life, or rating life, is defined as the number of revolutions or operational hours at a fixed speed that 90% of a batch of identical-sized bearings can endure before showing initial signs of fatigue. Generally, as the load increases, the expected fatigue life of a set of bearings decreases.
At Emerson Bearing, our expert technical team is here to assist you in ensuring your bearings don’t succumb to excessive stress. Whether you need guidance on bearing selection, installation, or maintenance, we’re ready to support you. Reach out to us today or explore our comprehensive resources, including our Catalog and Technical Toolbox pages, to learn more about how we can assist you with all your bearing requirements.
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