"bushings" is a correct and usable word in written English.
It is a noun that refers to a metal or plastic part that is inserted into a hole in a device in order to reduce friction and protect the device from wear. For example: "The mechanic replaced the worn-out bushings in the car's transmission."
When assembled, the pins are a free fit in the bushings and rotate slightly, relative to the bushings, when the chain goes onto and leaves a sprocket.
Alloys prepared in this way, known as phosphor bronzes, may contain only about 1 percent phosphorus in the ingot and a mere trace after casting, but their value is nevertheless enhanced for purposes in which a hard, strong metal is required, as for pumps, plungers, valves, and the bushings of bearings.
The 8XX.X alloys are used for sleeve bearings and bushings because the tin prevents seizing and galling.
Bronze is improved in hardness and strength by the addition of a small amount of phosphorus; phosphor bronze may contain 1 or 2 percent phosphorus in the ingot and a mere trace after casting, but its strength is nonetheless enhanced for such applications as pump plungers, valves, and bushings.
A roller chain is a development of the block chain in which the block is replaced by two side plates, a pair of bushings, and rollers.
A bar machine is designed for machining small threaded parts, bushings, and other small parts that can be created from bar stock fed through the machine spindle.
A roller link consists of two side plates connected by two tightly fitted bushings on which hardened steel rollers are free to rotate.
Pins and bushings permit precise joining of the two halves, which together are enclosed in a mold box.
These properties allow it to be used for bushings and bearings that require no lubricant, as liners for equipment used in the storage and transportation of strong acids and organic solvents, as electrical insulation under high-temperature conditions, and in its familiar application as a cooking surface that does not require the use of fats or oils.
It was so heavy that it sank in water, so hard and oily that it was sometimes made into ball bearings or self-lubricating bushings.
