Bevel gears used in Rolling Mill

Bevel gears are integral components in rolling mills, facilitating the effective transmission of power and ensuring the smooth operation of the machinery. These gears are designed to transmit power between shafts that are oriented at an angle, typically 90 degrees. 

### Functions of Bevel Gears in Rolling Mills:

1. Direction Change:
   - Bevel gears are primarily used to change the direction of the drive shaft. This is crucial in rolling mills where the orientation of the rolls may need to be adjusted to achieve the desired rolling process.

2. Power Transmission:
   - They facilitate the transfer of power between shafts that are not parallel, allowing for more compact designs in the machinery layout.

3. Speed Reduction:
   - Bevel gears can also be designed to reduce speed while increasing torque, which is beneficial in applications where high force is required to deform the material being rolled.

4. Adjustability:
   - In some rolling mills, bevel gears allow for adjustments in the angle of the rolls, enabling operators to fine-tune the rolling process for different materials and thicknesses.

### Types of Bevel Gears Used:

1. Straight Bevel Gears:
   - These have straight teeth and are used for applications where the angle of the shafts is 90 degrees. They are simpler in design but can generate more noise and vibration.

2. Spiral Bevel Gears:
   - These have curved teeth, allowing for smoother engagement and quieter operation. They are often preferred in high-speed applications due to their efficiency and reduced noise levels.

3. Hypoid Gears:
   - A type of spiral bevel gear, hypoid gears allow for shafts to be offset, providing additional flexibility in design. They can handle higher loads and are often used in heavy-duty applications.