That refers to something that moves around in a circle.
Unfortunately, the answer to that question is difficult to come by without knowing the location and use of the rotary couplings. The answer could be anywhere from $200-$2000. Please specify use for rotary couplings.
A rotary union / rotary joint is a mechanism used to transfer liquids and/or gases while rotating or swiveling from one connection to another. Rotary unions are engineered to endure a large range of temperature and pressure for a variety of conditions and environments. In addition, rotary unions may integrate multiple ports and handle different types of media concurrently.Rotary unions function by connecting to an input and securing onto another mechanism while allowing a moving connection to be preserved. They are utilized in a variety of applications; from miniature rotary unions for the semiconductor industry to large, heavy-duty rotary unions for industrial applications. Additionally, numerous materials, seals, and bearing types can be incorporated.Reference - .dsti.com/products/rotary-union
A rack and pinion, cam, crank, and screw can do that.
Induction motor
Four-colour printing on a two-colour flatbed press requires that a sheet be passed through the press twice. A sheet-fed rotary press and a web-fed rotary press, which is fed a continuous length of paper unwinding from a roll, can print four colours in a single pass of the paper, depending on design. Taken from Encyclopedia Britannica.
One easy way to identify if a rotary watch is real or fake is by looking for the text printed in the lower part of the dial. This print should read Est. Switzerland 1895 and it will be perfectly centered and viewable.
Tropicalized Rotary means
function of rotary camera
did the rotary engine (Hargrave lawrence) help
Rotary International was created in 1905.
rotary motion is movement that goes in a circle
Rotary Watches was created in 1895.
A rotary system can be used to calibrate flowmeters. Unless you are refering to a rotary telephone system, in which that works differently.
Rotary Broaching is a method of producing both internal and external forms fast and accurately on the end of a workpiece. Rotary broaching makes it possible to very accurate forms within 0.0005 inches within seconds. With rotary broaching not only can you produce standard shapes such as hexagons and squares but also shapes such as Double Hex Rotary Broaches, 6-Lobe Rotary Broaches, Serration Rotary Broaches, J500 Rotary Broaches, Spline Rotary Broaches, Involute Rotary Broaches, Torx Rotary Broaches, Double D Rotary Broaches and any other Special Design Required. Rotary broaches can be made to just about any size, English or Metric. Some of the material that can be rotary broached is brass, aluminum and steel and can go as much as 2 inches deep.
epitrochoid
Children's Rotary Club