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An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
Federal-Mogul Powertrain designs and manufacturers original equipment powertrain components and system protection products in the United States and internationally, its production line consists of different products, ranging from powdered metal parts to space suits, including engine bearings, pistons, piston pins, piston rings, cylinder liners ...
A hot box is the term used when an axle bearing overheats on a piece of railway rolling stock. [1] The term is derived from the journal-bearing trucks used before the mid-20th century. The axle bearings were housed in a box that used oil-soaked rags or cotton (collectively called "packing") to reduce the friction of the axle against the truck ...
Air bearing cutting engine Air bearing Doppler engine Air bearing two-axis table with friction drive Bearing with piston actor Air bearing satellite system for solar arrays Air-guided high-frequency knife drive Even for movements which cause damage due to disruptive wear with roller bearings, lifetimes of the drive systems are unlimited.
It was founded in 1917 as an informal group of manufacturers with the purpose of aiding bearing manufacturing during World War I. [ 2 ] 1933 saw the ratification of Articles of Incorporation , by the then current members, as the Anti-Friction Bearing Manufacturers Association (AFBMA).
Fluid bearings generally have very low friction—far better than mechanical bearings. One source of friction in a fluid bearing is the viscosity of the fluid leading to dynamic friction that increases with speed, but static friction is typically negligible. Hydrostatic gas bearings are among the lowest friction bearings even at very high speeds.
The Rolamite bearing has very little friction. A Rolamite is a technology for very low friction bearings developed by Sandia National Laboratories in the 1960s. [1] It consists of two cylindrical rollers held captive in a channel by an S-shaped metal strip. The strip is under tension, which keeps the rollers pressed together with the strip ...
The design of a plain bearing depends on the type of motion the bearing must provide. The three types of motions possible are: Journal (friction, radial or rotary) bearing: This is the most common type of plain bearing; it is simply a shaft rotating in a hole. [3]