| A | B |
|---|
| Belt & Pulley | The transmission of power between shafts by means of a belt connecting pulleys on the shafts. |
| Bevel Gear | One of a pair of gears used to connect two shafts whose axes intersect. |
| Cam & Follower | A pear-shaped disk with an off-center pivot point, used to change rotating motion into reciprocating motion. |
| Crank & Slider | A pivot pin near the outside edge of a wheel or disk that changes reciprocating motion into rotary motion. |
| Crown & Pinion | A small cogwheel (pinion gear) that engages or is engaged by a larger cogwheel (crown gear). |
| Drive Gear | The gear which transmits power and motion to the rest of the system. The input gear. |
| Driven Gear | The member of a pair of gears to which motion and power are transmitted by the other. The output gear. |
| Energy | The ability to do work. |
| Force | A push or pull on an object. |
| Gear | A toothed wheel that works with others to alter the relation between the speed of an engine and the speed of the driven parts. |
| Gear Ratio | The ratio of the speed of the driving member of a gear train to that of the driven member. |
| Idler Gear | A gear between the driver and the driven gear used to change rotational direction. |
| Input | Something put into a system, such as resources, in order to achieve a result. |
| Inverse | Opposite in position, direction, order or effect. |
| Lead Screw | A threaded shaft used to convert rotary movement to linear movement. |
| Linear Motion | Movement in a straight line. |
| Mechanism | The part of a machine which contains two or more pieces arranged so that the motion of one compels the motion of the others. |
| Oscillate | A swing back and forth at a regular rate. |
| Output | The results of the operation of any system. |
| Pitch | The distance between adjacent threads in a screw. |
| Rack & Pinion | A rotating gear that meshes with a bar that has gear teeth along its length. Changes rotating motion into linear motion. |
| Ratio | The quantitative relation between two amounts showing the number of times one value contains or is contained within the other. |
| Reciprocating | A back and forth movement. |
| Rotary Motion | Circular movement. |
| Simple Gear Train | A combination of two or more gears used to transmit motion between two rotating shafts or between a shaft and a slide. |
| Torque | A twisting force. |
| Universal Joint | A joint that allows connected shafts to spin freely while permitting a change in direction. |
| Work | The application of force that moves an object a certain distance. |
| Worm & Wheel | A mechanical arrangement consisting of a toothed wheel driven by a short revolving cylinder bearing a screw thread. |
