High Quality High Precision Cylindrical Gears Herringbone Gear Double Helical Gear

A combination of left-handed and right-handed helical gears with the same twist angle is called a double helical gear. Doublehelical gears transmit rotational motion between two parallel shafts.
Double helical gears have all of the advantages of helical gears, which are strong and quiet, plus have the benefit of canceling the thrust forces by combining helical gears with both right and left-hand twists. On the other hand, they have the disadvantage of being difficult to manufacture.
Double helical gears and herringbone gears are the same types of gear, but those with a groove in the center are called double helical gears, while those without a track where the left and right teeth meet in the center are called herringbone gears.
Advantages of double-helical gears:
1. Double helical gears are similar to a worm gear, but the teeth are on two opposite sides of the gear, which provides a
reduction ratio of 1:2.
2. Double helical gears have very high load capacity and are suitable for heavy-duty applications.
3. They have a large number of teeth, which helps reduce heat build-up. Hence they can last longer.
4. They provide an increased reduction ratio in comparison to standard worms gears.
5. Helical gears can be used with both parallel and non-parallel shafts.
6. The tooth profile is more efficient than that of a worm gear.
7. Double helical gears have fewer parts in comparison to worms gears.
8. They produce low noise.
9. Double helical gears are better at cutting curves compared to spur gears.
10. Double helical gears are manufactured using two spiral-shaped surfaces on a single gear, making them more robust than the normal ones.
11. Double helical gears are very smooth at gear operations.
12. Double helical gears are simple and easy to use, making them economical for most applications.
13. They are more efficient because they transfer power between the input and output shafts, providing a significant amount of power to the output shaft with less mechanical energy required at the input.
14. They have a high-efficiency factor that is determined by their ratio, which is often significantly higher than other types of gear teeth (such as spur or bevel).

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