Because spiral bevel gears do not have the offset, they have less sliding between the teeth and are more efficient than hypoids and create less heat during procedure. Also, one of the main advantages of spiral bevel gears is the relatively large helical spiral bevel gear motor amount of tooth surface that’s in mesh throughout their rotation. For this reason, spiral bevel gears are an ideal option for high speed, high torque applications.
Spiral bevel gears, like additional hypoid gears, are made to be what’s called either right or left handed. A right hand spiral bevel gear is defined as having the outer half a tooth curved in the clockwise path at the midpoint of the tooth when it is viewed by searching at the facial skin of the apparatus. For a left hand spiral bevel gear, the tooth curvature would be in a counterclockwise direction.
A equipment drive has three primary functions: to improve torque from the traveling equipment (motor) to the driven equipment, to lessen the speed generated by the motor, and/or to change the direction of the rotating shafts. The connection of this equipment to the apparatus box can be achieved by the use of couplings, belts, chains, or through hollow shaft connections.
Rate and torque are inversely and proportionately related when power is held continuous. Therefore, as velocity decreases, torque boosts at the same ratio.
The heart of a gear drive is actually the gears within it. Gears operate in pairs, engaging each other to transmit power.
Spur gears transmit power through shafts that are parallel. The teeth of the spur gears are parallel to the shaft axis. This causes the gears to produce radial reaction loads on the shaft, however, not axial loads. Spur gears tend to become noisier than helical gears because they run with a single type of contact between tooth. While the tooth are rolling through mesh, they roll from contact with one tooth and accelerate to contact with another tooth. This is unique of helical gears, that have more than one tooth in contact and transmit torque more easily.
Helical gears have teeth that are oriented at an angle to the shaft, as opposed to spur gears which are parallel. This causes more than one tooth to be in contact during procedure and helical gears can handle having more load than spur gears. Due to the load sharing between teeth, this arrangement also allows helical gears to operate smoother and quieter than spur gears. Helical gears produce a thrust load during operation which needs to be considered if they are used. Most enclosed gear drives use helical gears.
Double helical gears are a variation of helical gears in which two helical faces are placed next to each other with a gap separating them. Each encounter has identical, but opposite, helix angles. Having a double helical group of gears eliminates thrust loads and offers the possibility of even greater tooth overlap and smoother procedure. Like the helical gear, double helical gears are generally found in enclosed gear drives.
Herringbone gears are very similar to the double helical gear, but they do not have a gap separating both helical faces. Herringbone gears are usually smaller than the comparable dual helical, and so are ideally fitted to high shock and vibration applications. Herringbone gearing is not used very often due to their manufacturing issues and high cost.

As the spiral bevel gear is actually a hypoid gear, it isn’t always viewed as one because it doesn’t have an offset between the shafts.
One’s teeth on spiral bevel gears are curved and also have one concave and one convex side. They also have a spiral angle. The spiral angle of a spiral bevel gear is thought as the angle between your tooth trace and an component of the pitch cone, like the helix angle within helical gear teeth. In general, the spiral angle of a spiral bevel gear is thought as the suggest spiral angle.