Our patented “white babbit” or “Babbit” metal deposition technology by thermal spraying, static or dynamic casting provides benefits to the industry. Benefits such as speed and reliability in the coating and repair of bearings for rotating equipment, which require time sensitive execution of services, to return equipment to their full operations.
Our team is prepared to work as fast as possible to reduce the downtime of your equipment.
Patented metal alloys used for axial and radial bearing applications, technically also known as white metal alloys or “babbitts”, are low melting point alloys, and therefore easy to handle. In these alloys, a structure of hard and wear-resistant crystals is combined with a soft matrix, which allows the lubricating oil to circulate between the crystals, in addition to absorbing impacts and facilitating adherence to the base metal.
Its application takes place through different methods:
Thermal spraying (metallization): The application of tin-based patent metal, via thermal spraying, provides a solid layer, without pores and with excellent adhesion to the base, having a low hardness, good resistance to mechanical loads and a low coefficient of friction, giving the bearing anti-friction properties, self-lubrication and protecting the shaft against wear and tear that may occur due to equipment failure.
On the other hand, the lead-based patent metal has different characteristics from the aforementioned alloy, since the temperature and maximum speed supported is lower, without deformation of the patent metal applied to the bearing. Generally, they are used in low speed bearings and with a low operating temperature.
Static casting: It is indicated for large bearings that require a larger layer of babbitt. It is also used in bearings that were originally made using static casting.
Centrifugal Casting: This method consists of pouring the liquid material through a cylindrical base in a high rotation movement, thus causing the metal to be adhered to the surface under centrifugal force. When the liquid meets the surface of the part, it is cooled, solidifying and, due to the action of the centrifugal force, it is free of porosity, impurities or imperfections. This process is distinguished by its higher quality, both in terms of defects and the properties obtained at the end of the process, as a more refined microstructure and layers are found that benefit the performance of the part.
Find out how Cascadura Coating can service the industries below.
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