Mind map

Gears or Cogwheels

Hriday Jain English

Map content

Gears or Cogwheels

Types of gears
- External vs internal gears
- Spur
- Helical
  - Double Helical
  - Single Helical
- Bevel
  - Spiral bevel
- Worm
- Rack and pinion
Nomenclature
- Rotational frequency (n)
- Angular Frequency (w)
- Number of teeth (N)
- Path of contact
- Axis
- Pitch circle
- Pitch diameter
- Module or modulus
- Addendum
- Dedendum
Backlash
- It is the error in motion that occurs when gears change direction
  - Solutions
    - Gear can be split along a plane perpendicular to the axis
    - Tapering the teeth in the axial direction
Shifting of Gears
- Manual transmission
- Automatic transmission
- Derailleur gears
  - Sprockets
  - Roller chain
- Hub gears
  - Epicyclic gearing
  - Sun-and-Planet gears
Gear Materials
- Nonferrous alloys
- Cast Irons
- Powder-metallurgy
- Plastics