Rotary may refer to:

General

Rotary motion Rotation around a fixed axis is a special case of rotational motion. The fixed-axis hypothesis excludes the possibility of an axis changing its orientation and cannot describe such phenomena as wobbling or precession. According to Euler's rot ...

Engineering and technology

Rotary dial A rotary dial is a component of a telephone or a telephone switchboard that implements a signaling technology in telecommunications known as pulse dialing. It is used when initiating a telephone call to transmit the destination telephone number ...

, a rotating telephone dial *

Rotary engine (disambiguation) A rotary engine is a type of internal combustion piston engine used in some early aircraft, motorcycles, and cars. Almost the entire engine rotates about a fixed crankshaft. Rotary engine may also refer to: * Pistonless rotary engine, a type of pi ...

, multiple types of engines called "rotary" *

Rotary latch A latch or catch (called sneck in Northern England and Scotland) is a type of mechanical fastener that joins two (or more) objects or surfaces while allowing for their regular separation. A latch typically engages another piece of hardware on t ...

* Rotary milking shed, a type of milking shed used in the dairy industry *

Rotary snowplow A rotary snowplow (American English) or rotary snowplough is a piece of railroad snow removal equipment with a large circular set of blades on its front end that rotate to cut through the snow on the track ahead of it. The precursor to the rotary ...

, one type of railroad snowplow used especially for deep snow removal *

Rotary system The rotary machine switching system, or most commonly known as the rotary system, was a type of automatic telephone exchange manufactured and used primarily in Europe from the 1910s. The system was developed and tested by AT&T's American engineerin ...

, a type of pre-electronic telephone switch *

Rotary table (drilling rig) A rotary table is a mechanical device on a drilling rig that provides clockwise (as viewed from above) rotational force to the drill string to facilitate the process of drilling a borehole. Rotary speed is the number of times the rotary table mak ...

, a device used to apply directional force to a drill string *

Rotary tiller A cultivator is a piece of agricultural equipment used for secondary tillage. One sense of the name refers to frames with ''teeth'' (also called ''shanks'') that pierce the soil as they are dragged through it linearly. It also refers to ...

, a motorised cultivator *

Rotary woofer A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch of an impeller rotating at a constant speed. The pitch of the fan blades is control ...

, a type of loudspeaker capable of producing very low frequency sound *

Rotary wing aircraft A rotorcraft or rotary-wing aircraft is a heavier-than-air aircraft with rotary wings or rotor blades, which generate lift by rotating around a vertical mast. Several rotor blades mounted on a single mast are referred to as a rotor. The Internati ...

Arts and entertainment

* "The Rotary", a song by Andy Partridge from ''

Take Away / The Lure of Salvage ''Take Away'' and ''The Lure of Salvage'' are sides one and two, respectively, of the debut record by English musician Andy Partridge (credited as "Mr. Partridge"). Co-produced with John Leckie, the LP was released in February 1980 by Virgin Rec ...

Organisations and enterprises

* Rotary International, or Rotary Club, an international service organization founded in the United States ** Rotary Foundation, non-profit foundation of Rotary International ** Rotary Scholarships, scholarships offered by the organization * Rotary Watches, a Swiss watchmaker

Roads

* Roundabout, or "rotary", a circular roadway intersection {{disambiguation