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BG42 is a domestic alloy steel. It is an aeronautics bearing-grade composition with added carbon and vanadium. 154CM. 154-CM is an American-made stainless alloy. It combines three principal elements: carbon, chromium, and molybdenum. Added levels of carbon and chromium are also used. Re-sharpening can require extra effort, but is needed less often.
There are several common designs of ball bearing, each offering various performance trade-offs. They can be made from many different materials, including stainless steel, chrome steel, and ceramic (silicon nitride, Si 3 N 4). A hybrid ball bearing is a bearing with ceramic balls and metal races. Angular contact
The crankshaft and connecting-rod big-end bearings in current automobile engines are made of a replaceable steel shell, keyed to the bearing caps. The inner surface of the steel shell is plated with a coating of bronze , which is in turn coated with a thin layer of Babbitt metal as the bearing surface.
The Torrington Company was a firm that developed in Torrington, Connecticut, originally called the Excelsior Needle Company.It was formed in 1866 around the new idea of using a "cold swaging" technique to create better sewing machine needles, as Torrington expanded, it began to produce other goods.
NTN BEARPHITE (TM) bearings are fluid hydrodynamic bearings made from sintered material whose sliding bore surface has hydrodynamic grooves shaped like herringbones, which permit higher rotational accuracy at faster speeds. Such bearings are used in audiovisual equipment, automotive electrical equipment, household appliances and office ...
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