Bevel Gears,Straight Bevel Gears,Bevel Gears Manufacturer,Straight Bevel Gears Manufacturer,India

There are four basic types of bevel gears-

Straight bevel gears:
These gears have a conical pitch surface and straight teeth tapering towards an apex
Zerol bevel gears:
This is similar to a bevel gear except the teeth are curved. In essence, Zerol Bevel Gears are Spiral Bevel Gears with a spiral angle of zero
Spiral bevel gears:
The teeth are curved teeth at an angle allowing too contact to be gradual and smooth
Hypoid bevel gears:
These gears are similar to spiral bevel except that the pitch surfaces are hyperboloids rather than cones. Pinion can be offset above or below gear center, thus allowing larger pinion diameter, and longer longer life and smoother mesh, with additional ratios eg 6:1, 8:1, 10:1

The design of bevel gears results in thrust forces away from the apex. With the bearing limitations the gears have to be carefully designed to ensure that they are not thrown out of alignment as they are loaded.

Straight bevel gears
These are gears cut from conical blanks and connect intersecting shaft axes. The connecting shafts are generally at 90o and sometimes one shaft drives a bevel gear which is mounted on a through shaft resulting in two output shafts. The point of intersection of the shafts is called the apex and the teeth of the two gears converge at the apex.

Zerol Bevel Gears
The advantage of Zerolbevel gears compared to straight bevel gears is that operate with a smooth localised point contact as opposed to a line contact enabling smoother operation with low vibration levels and higher speeds. Because there is not spiral angle and no additional developed thrust these gears can be used as direct replacements for straight bevel gears.

Spiral Bevel Gear
These are produced using a spiral gear form which results in a smoother drive suitable for higher speed higher loaded applications. Again satisfactory performance of this type of gear is largely dependent upon the rigidity of the bearings and mountings.

Hypoid Bevel Gear
Hypoid gears are best for the applications requiring large speed reductions with non intersecting shafts and those applications requiring smooth and quiet operation. Hypoid gears are generally used for automotive applications.