What are Helical Gears and What are They Used For?
As you may already know, gears are crucial for motors and machines. Why? Because they help increase torque output, and adjust the rotation.
Helical gears are the most common gear in transmissions with spur gears. They are some differences between them; spur gears are simple and more inexpensive and helical gears are considered for high power applications.
Helical gears are considered for high power applications because they have a smoother operation mostly due to the angle twist. Conversely, spur gears have straight teeth and can be very loud. They also increase the stress on the gear teeth.
In an helical gear, the teeth started to engage and the contact is gradual. Because multiple teeths are always in mesh, the individual tooth has less load. As a result of this the transition is smoother and less noisy. The range of the helix angle is about 15 to 30 degrees.
If the angle of the teeth is correct helical gears can adjust the rotation angle by 90 degrees when is place on perpendicular shafts.
Helical gears can handle more load than spur gears. This is mainly because the tooth is larger and diagonally position. The normal gear ratio range is 3:2 to 10:1.
These are the main reasons why helical gears are used most commonly in transmissions. Keep in mind that most of the gears in your car are helical.
In Malaysia, you can find spur and helical gears easily and the price will vary depending on the type of gear you want. The prices can start as low as RM 50 up to RM 350 or even more.
If you are looking for simplicity and efficiency, you should get spur gears. On the other hand, if you need smooth application, you should definitely go for helical gears.