Different Types of Gears | Basic Mechanical Engineering Knowledge |

🔧 Different Types of Gears and Their Applications:

Gears are mechanical components that transmit torque and motion between machine parts. Each gear type is uniquely designed for specific functions based on direction, angle, and power needs. Below is a visual reference of common types of gears used in mechanical and automotive systems:

🛠️ Types of Gears Shown in the Image:

• Spur Gear
  Teeth are straight and parallel to the gear axis.
  Used in simple and low-speed applications like clocks, washing machines.


• Straight Gear
  A type of bevel gear with straight teeth, used to transmit motion between perpendicular shafts.


• Spiral Gear
  Similar to straight bevel gears but with spiral-shaped teeth for smoother, quieter operation.


• Worm Gear
  Consists of a worm (screw) meshing with a gear.
  Ideal for applications requiring high torque and speed reduction.


• Helical Gear
  Teeth are cut at an angle, providing smooth and silent operation.
  Common in automotive transmissions.


• Herringbone Gear
  Two helical gears joined in a “V” shape, eliminating side thrust.
  Used in heavy machinery and turbines.


• Planetary Gear
  A central sun gear surrounded by planet gears inside a ring gear.
  Used in automatic gearboxes and differential systems.


• Hypoid Gear
  Similar to spiral bevel gears, but axes are not in the same plane.
  Commonly found in car differentials.


• Internal Gear
  Teeth are cut on the inside surface of a cylinder.
  Often used in planetary gear systems.


• 2 Helical Gear
  A paired set of helical gears for more efficient torque transfer.


• Rack and Pinion
  A circular gear (pinion) engages with a linear gear (rack) to convert rotational motion into linear motion.
  Used in steering systems.


• Screw Gear
  A pair of helical gears with axes that are not parallel or intersecting.
  Used in low-power transmission.

📌 Conclusion:

Each gear serves a specific purpose depending on the mechanical need. Understanding these gear types can help you choose the right component for machines, automotive systems, or robotics.

🖼️ Feel free to download or share this gear types chart for educational use.