Spiral bevel gears are commonly used as final drives in mechanical systems, particularly in automotive and industrial applications. The final drive is the component that transfers power from the transmission to the wheels. Choosing spiral bevel gears as the final transmission device has the following advantages:

Smooth and quiet operation:

Spiral bevel gears provide smoother operation than straight bevel gears. The helical shape of the gears allows for gradual meshing, reducing noise and vibration when the gears engage. This is particularly important in the vehicle's final drive to ensure a quiet and comfortable ride.
Efficient transmission:

Spiral bevel gears generally exhibit high mechanical efficiency due to their tooth geometry. The gradually meshing tooth profile helps distribute load evenly, minimizing friction losses and improving overall transmission efficiency.

Axial load bearing capacity:

Spiral bevel gears are designed to effectively withstand axial loads. In a vehicle's final drive, axial loads are typically generated by vehicle weight and processes such as acceleration, deceleration, and cornering. Spiral bevel gears handle these axial loads efficiently.
Compact design:

Spiral bevel gears can be designed in compact shapes to facilitate installation where space constraints are present. This is crucial in vehicle final drives, where a compact design helps optimize the overall vehicle layout.

High torque transfer:

Spiral bevel gears are capable of transmitting high levels of torque. This is critical in final drive, as the gears need to take the torque generated by the engine and transfer it to the wheels efficiently.
Versatility:

Spiral bevel gears are versatile and can be designed for a variety of applications. Its flexibility makes it suitable for use in a variety of final drive systems including cars, trucks, motorcycles and industrial machinery.
The use of spiral bevel gears in final drives can help improve the performance, reliability and efficiency of the entire vehicle or mechanical system. Its characteristics make it ideal for applications requiring smooth, quiet operation, high torque transfer and axial load handling capabilities.