2. Introduction
Gear is a toothed wheel which has evenly spaced tooth on its
periphery.
Gear mesh with other gear and transmit power from one shaft to
another shaft without slippage.
Gear are manufactured by Casting, Stamping, Extrusion, Rolling and
Powder Metallurgy.
The most common method of Gear manufacturing is Machining
3. Types of Gear
Gear are classified according to the position of shaft axis
Parallel Shaft.
Intersecting Shaft.
Non Parallel and Non Intersecting Shaft.
16. Casting
1. It is the cheapest method of gear manufacturing.
2. Heavy gears are manufacture by casting processes.
3. These gear are relatively weak and inaccurate.
4. These gears are used for low speed drive operations.
17. Stamping
1. This process is used for mass production of small gear.
2. This method is used for sheet metal up to thickness of 3 mm.
3. Stamping is doe with the help of die and punch using press
machine.
4. These gears are having high accuracy and surface finish.
5. These gears are used in toys, watches and clocks.
18. Rolling
1. Hot Rolling and Cold Rolling are used to make these gears.
2. Gear blank is rolled against a master gear to
produce teeth on its periphery
19. Extrusion
1. It is also suitable for mass production of small size of gears from
materials like Al, Brass and Bronze
2. In this process heated gear blank is placed
inside the cylinder and pressed from one
end with ram
3. The other end carries die similar to the
shape of required gear
