Deflection

Differences between closed coil and open coil helical spring
Solid

Solid

Spring is one elastic machine element that can absorb energy by undergoing significant amount of elastic deformation under the action of external loading and can subsequently release that energy when external load is removed. Springs are basically of two types—helical spring and leaf spring. Helical springs are made by bending wires of constant diameter in the form of a helix. Such springs are commonly used for storing and releasing energy

Single helical gear and double helical gear
Solid

Solid

Gear drive is most widely used mechanical power transmission system in small to large scale machineries. It is one engagement type positive drive (no slip) suitable for transmitting motion, torque and power over comparatively small distances (usually below 1 m) and also modifying them as per requirement. Power is transferred from driving shaft to driven shaft by means of successive engagement and disengagement of teeth cut on the cylindrical gear