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Single row deep groove ball bearings are the most frequently used type of rolling bearing thanks to their versatility. They are suitable for high and very high speeds, accommodate radial and axial loads in both directions and require little maintenance.
Open bearings are suitable for high to very high speeds and they can be lubricated with grease or oil.
Deep groove ball bearings with gap or lip seals on both sides are greased with a high-quality grease and are lubricated for life.
The suffix 2Z designates gap seals on both sides and is suitable for high speeds.
Bearings with the suffix 2RS have lip seals on both sides made from nitrile butadiene rubber NBR and are suitable for moderate speeds.
Tapered roller bearings have tapered inner and outer ring raceways and tapered rollers. They are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads. The projection lines of the raceways meet at a common point on the bearing axis to provide true rolling and low friction. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle.
Single row tapered roller bearings are separable, i.e. the inner ring with roller and cage assembly (cone) can be mounted separately from the outer ring (cup).
Neodymium magnet (NdFeB) is the most widely used type of rare-earth permanent magnet, from an alloy of neodymium, iron and boron to form the Nd2Fe14B tetragonal crystalline structure. Developed in 1982 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of permanent magnet commercially existing. They are available in a wide range of shapes, sizes, grades and they don’t need any tooling: They guarantee a high remanence, high coercivity, high energy product and also a very good mechanical and processing properties.
Despite constant improvement, NdFeB remains susceptible to corrosion, therefore a protective coating such as Passivation, Zn, Ni+Cu+Ni, Epoxy resin and many others is necessary.
Ferrite magnets, also known as ceramic ferrite because of their production process, became commercially available in the mid 1950’s and are the least expensive class of permanent magnet materials.
The raw materials of ferrite magnets, SrO, BaO and Fe2O3, are mixed in the correct proportions, granulated, and calcined. The presintered granulate is ground to a powder and it can then be pressed wet or dry in a magnetic field (anisotropic) or in the absence of a magnetic field (isotropic) and sintered.
With its competitive cost, ferrite has become one of the most wildly use magnets in the world and can be molded into cylinder, disk, block and arc shapes. Besides It has a good corrosion resistance, so no plating is required.
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