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New Application And Basic Performance Requirements Of Timken Imported Bearings

SF-2 boundary lubrication Timken bearing plus: acidic polymer must be used in the assembly process with formaldehyde, which has high wear resistance. The storage pit on the surface of Timken bearing is regularly arranged and filled with grease. Especially for high load, low-speed rotation and swing motion, it often sets a negative website that is not easy to form fluid lubrication. Under the condition of boundary lubrication, The long-term use without refueling and maintenance can prolong the service life of Timken bearings. At present, it can be used in metallurgical machinery, mining machinery, water conservancy machinery, auto parts, engineering machinery and agricultural machinery. Oil free self-lubricating Timken bearing: the product is a mixture of steel plate as substrate, sintered spherical bronze powder in the middle layer, and rolled PTFE and lead on the surface.

 

It has small friction coefficient, wear resistance and corrosion resistance. It has oil-free self-lubricating characteristics and long service life. It can be used to reduce cost, reduce noise and prevent sticking and sliding. It is widely used in various machines, such as printing presses with sliding parts, textile machinery, hydraulic transporters, tobacco machinery, pharmaceutical machinery, medical treatment, micro motors, automobiles, motorcycles, etc. Metal based solid self-lubricating Timken bearing is embedded with the characteristics and functions of a metal Timken bearing. The new self-lubricating Timken bearing is lubricated by metal matrix and specially formulated solid lubricant. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance and strong self-lubricating ability.

 

Traditional oil-containing Timken bearing:

low noise and self-lubricating advantages. Oil has become a new favorite of computer CPU fan Timken bearing and market demand; In addition, with more and more Cao Yin, the application of oil in daily household appliances is expanding. The basic requirements for working on Timken bearings depend largely on the performance of Timken bearings. Choosing whether to create a suitable Timken bearing material will have a significant impact on its performance and life. Under normal conditions, Timken bearing spalling is the main form of failure under fatigue alternating stress, and precision Timken bearing wear due to friction loss. In addition, there are cracks, dents, rust and other irregular causes of Timken bearing damage. Therefore, Timken bearing should have a high resistance to plastic deformation, reduce friction and wear, good rotation accuracy, good dimensional accuracy and stability, and long-term contact fatigue life. The properties of many materials and heat treatment processes are determined together.

New Application And Basic Performance Requirements Of Timken Imported Bearings

Fatigue failure is one of the surface failure forms of Timken bearing. It is the failure of metal under the long-term action of alternating load. It is mainly manifested in the process of fatigue crack initiation, propagation and fracture.

 
There are two ways to produce cracks:

It is generated from the surface, that is, during the contact process of Timken rolling bearing, due to the action of external load, it causes periodic contact stress on the working surface, produces plastic deformation and deformation hardening on the surface, and then small cracks appear on the working surface, developing from the surface to the inside. Between the two surfaces formed by the crack, the crack wall is forced to open due to the penetration of lubricant, Force the crack to develop forward; Second: the crack is generated from the surface layer, that is, under the repeated action of surface contact stress, the crack initially occurs at a certain depth from the contact surface, and develops at a certain angle with the surface. After reaching a certain depth from the surface, it goes out to the surface, and then forms pitting and peeling, leaving pitting on the contact surface.

 

Cracks are generated from the surface or from the surface, both of which are objective (after carburizing, surface quenching and other heat treatments, if there are uneven hardness, uneven structure and adverse internal stress, the cracks are generally generated from under the surface under the action of contact stress. On the contrary, if the surface processing quality of parts is poor, there are defects (oxidation and decarburization) , if the friction force is high or the lubrication is poor, the crack is generated from the surface.

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