How to Determine the Right Bevel Gear Design for Your Application.

 

Simple gears are used to transmit power from one axis to another, but if the shafts intersect at odd angles, they don't intersect at all, or things get complicated if you need to change the direction of rotation of the shafts. You need bevel gears to keep things moving. Bevel gear designs are commonly used in vehicles of all types, as well as in many industrial applications.

On standard gears, the tooth surface is cylindrical. In bevel gears, the pitch plane is conical. The pitch speed and the angle formed by the shaft on which it is mounted is called the pitch angle. Bevel gears often run at right angles, but can be designed to work at any lean angle. The hand drill is an example of a tool that uses a 90 ° bevel gear.

Bevel gear example

Bevel gears are classified according to their shape, and each type of bevel gear offers its own characteristics or advantages. The following is a list of bevel gear examples.

Straight bevel gear:-. In a straight bevel gear, the teeth are straight, but they taper toward the apex of the bevel surface. This is the most common type of bevel gear. It works well, but it can make noise, especially when operating at high speeds or in overloaded conditions.

Spiral bevel gear:-. In helical bevel gears, the teeth are bent and set in a helical fashion, making more progressive contact with the opponent. Smoother operation eliminates noise (and increased risk of tooth breakage) from spur bevel gears.

Zero bevel gear:-. Zero bevel gears also have bent teeth, but they do not have a helical angle, so the teeth are aligned with the axis.

Hypoid bevel gear:-. In hypoid bevel gears, the pitch angle is hyperbolic rather than bevel, and the pinion can travel below or above the center of the gear.

In essence, bevel gear design is very complex and even complex. Therefore, design and manufacture require careful planning to achieve the desired operational results.

Which Bevel Gear is Right for Your Application?

Bevel gears are used in all types of vehicles, as well as in industrial applications such as wind turbines and cooling towers, steel manufacturing and printing presses. If your application requires high rpm, high torque, and / or many load cycles, a spiral bevel gear will be your best option. The spiral design is also recommended to reduce speed. If your application needs to transmit power to two shafts rotating at different speeds (eg vehicle differentials), a hypoid bevel gear is the best option.