Bihanga Borah's Blog

Classification of gears can be done according to the relative position of the axes of revolution into three types. They are: Gears for Parallel shafts 1.1 Spur Gears 1.2 Helical Gears 1.3 Herringbone Gears 1.4 Rack and Pinion Gears for Intersecting Shafts 2.1 Straight Bevel Gears 2.2 Spiral Bevel Gears Gears for Skew Shafts 3.1 Hypoid Gears 3.2 Worm Gears Classification about these  types of gears  discussed below. 1. Gears for Parallel Shafts: The motion between parallel shafts is same as to the rolling of two cylinders. Gears under this category are the following: 1.1 Spur Gears: Straight Spur gears are the simplest form of gears having teeth parallel to the gear axis. The contact of two teeth takes place over the entire width along a line parallel to the axes of rotation. As gear rotate , the line of contact goes on shifting parallel to the shaft. 1.2 Helical Gears: In helical gear teeth are part of helix instead of straight across the...

Agrilculture  Agriculture is the cultivation and breeding of animals,plants and fungi for food, fiber,biofuel, medicinal  plants and other products used to sustain and enhance human life.d species created food surpluses that nurtured the development of civilization. The study of agriculture is known as agricultural science. The history of   agriculture dates back thousands of years, and its development has been driven and defined by greatly different climates, cultures, and technologies. Industrial agriculture based on large-scale monoculture farming has become the dominant agricultural methodology.Modern agronomy, plant breeding, agrochemicals such as pesticides and fertilizers, and technological developments have in many cases sharply increased yields from cultivation, but at the same time have caused widespread ecological dam...