Gear Terminology

Gears are widely used in mechanical industries for power transmission. It is used where small distance between driver and driven shaft. It is the only positive drive which can transfer exact velocity ratio to the driven shaft, that's why it is widely used in various machines and other mechanical devices. Gear terminology means all definitions used to describe a gear or the terms used to design a gear.

Terms Used In Gear

Face of tooth: It is defined as the surface of the tooth above the pitch circle is known as face. Flank of tooth: The surface of the tooth below the pitch circle is known as flank. Top land: The top most surface of the tooth is known as the top land of the tooth. Face width: Width of the tooth is known as face width. Pitch Circle: It is an imaginary circle which is in pure rolling action. The motion of the gear is describe by the pitch circle motion. Pitch Circle diameter: The diameter of the pitch circle from the center of the gear is known as pitch circle diameter. The gear diameter is described by its pitch circle diameter.