Machinery related terms
Gear: A toothed wheel or cylinder that meshes with another toothed wheel or cylinder in order to transmit or modify rotary or linear motion and force.
Bearing: A machine part that supports and reduces the friction of linear or rotational movements between two surfaces.
Bushing: A cylindrical lining that is used to support a rotating shaft, reduce friction, and prevent wear.
Bolt: A metal fastener with an internal thread that is inserted into a pre-tapped hole that helps secure two or more parts together.
Screw: A fastener that has a spiral thread, which is used to join two or more parts together and can be tightened when inserted into the tapped hole.
Nut: A metal fastener with an internal thread that is used to fasten screws or bolts.
Washer: A flat metal ring with a hole in the center which is used to spread and reduce stress in a bolted connection, and to prevent moisture seeping into the joint.
Pulley: A wheel with a groove along its circumference that is used to transfer rotational motion, change direction, and control speed.
Shaft: A cylindrical, usually rotating, part of a machine that transmits power or motion.
Coupling: A device used to connect two rotating shafts in order to transmit power or torque.
Chain: A series of metal links that are connected to each other and are used to transmit power and motion from one sprocket or pulley to another.
Gasket: A compressible material that is used to fill the space between two or more mating surfaces and to prevent leaks.
Bracket: A support structure that is used to support or hold other components in place.
Connector: A device used to mechanically join two or more mechanical parts together.
Spanner: A tool used to turn a nut which has been either slotted or grooved so that it can be tightened or loosened.
Hose: A flexible pipe or tube used to transfer liquids between stationary and moving machines and components.
Valve: A mechanical device used to control the flow of fluids and gases by opening, closing, or partially obstructing passages.
Clamp: A device that can be tightened to hold two or more surfaces together.
Wheel: A circular disk that is mounted on an axle, and is used to transmit rotary motion or to support a load.
Pinion: A small, toothed wheel that is used to transmit rotary motion between shafts which are not in line.
Roller: A cylindrical or tapered part that is used to reduce friction between two surfaces.
Cam: A rotating or sliding part that is used to cause a cyclic motion to occur when it interacts with another surface.
Plug: A plug used in a power or data connection to momentarily open or close a circuit, or to join two electrical wires together.
