Gears and their types...

Gears and their types Steel plant supplies material for the manufacture of gears and it uses gears of different types and sizes in the equipment and machineries deployed for the production of steel. Gears are the most common means used for power transmission. They are compact, positive-engagement, power transmission elements that determine the speed, torque, and direction of rotation of driven machine elements. They are widely used in various mechanisms and devices to transmit power and motion positively (without slip) between two shafts which are (i) parallel, (ii) collinear, (iii) perpendicular and intersecting, (iv) perpendicular and nonintersecting, and (v) inclined at any arbitrary angle. The power transmission can be (i) without change in the direction of rotation, (ii) with change in the direction of rotation, (iii) without change of speed (of rotation), and (iv) with change in speed at any desired ratio. Sometimes a gearing system (rack – and – pinion) is used to transform rotary motion into linear motion and vice-versa. Gear wheels have projections called teeth that are designed to intersect the teeth of another gear. When gear teeth fit together or interlock in this manner they are said to be in mesh. Gears in mesh are capable of transmitting force and motion alternately from one gear to another. The gear transmitting the force or motion is called the drive gear and the gear connected to the drive gear is called the driven gear. Basically gears are wheels having, on its periphery, equispaced teeth which are so designed that those wheels transmit, without slip, rotary motion smoothly and uniformly with minimum friction and wear at the mating tooth profiles. For the achievement of such favourable conditions, maximum numbers of gears have their tooth form based on involute curve. Involute curve is simply...