Helical gears are designed similarly to spur gears and can be used to drive parallel axes or non-parallel/ non-intersecting shafts. Additionally, helical teeth are oriented at an angle, causing multiple teeth to be in contact with one another at any given time. This produces a quieter, smoother operation.
Ever-power provides China helical gears that are made in left and right-handed versions that have a standard helix angle of 45 degrees to transmit power and motion between non-intersecting shafts which are in parallel or at 90 degrees to one another. To operate parallel shafts, helical gears featuring opposite-hand helix angles are needed. For shafts that are 90 degrees, the same helix angle is required.
A helical gear is a gear that consists of two oppositely oriented gears. These gears are designed to transfer axial forces toward the center of the gear. In a stable arrangement, the total axial force acting on both gears is zero.
Helical gears are a popular choice for heavy-duty machines and construction operations, thanks to their high torque transfer and well-designed gear teeth. Moreover, they are durable and flexible. In addition, they can be connected in either a parallel or perpendicular set-up. Their versatility allows manufacturers to tailor their machinery to specific needs.
A helical gear may be made from carbon steel, aluminum, or even bronze. While carbon steel is cheaper, it is susceptible to corrosion and may not be durable enough for your application. In addition, it is more expensive to produce, so it is often used in large transmissions.
Types of Helical Gears
When it comes to gear manufacturing, single and double helical gears can be custom-made. Single helical gears consist of a single row of miter teeth cut or inserted on the gear body perimeter, while double-helical gears consist of two rows of mirrored miter teeth. The advantages of double-helical gears over single ones are increased resistance and durability and the elimination of axial loading.
Helical Gear Characteristics
Helical gears are defined by their unique design with angled cuts at the edge of the gear. They reduce friction, heat, and noise exceptionally well compared to other types of gear. Each gear tooth is designed to interlock with the teeth of the opposing helical gear, which rotates in the opposite direction.
Helical gears work like any other gear that rotates via interlocking teeth, but they are more tempered and progressive than different types. This is mainly due to how their teeth interact with the axis rotation, which can be parallel or crossed at a 90-degree angle.
Helical Gears Uses
Helical gears are widely used in automotive transmissions. Their smooth and quiet operation make them an excellent choice for high-speed and high-load applications. Because they work well on non-parallel shafts, helical gears are a popular choice over spur gears. They are also suitable for applications in the food and rubber and plastic industries. Compared to spur gears, they have a higher capacity for load transfer.
Helical gears are also cheaper than spur gears and bevel gears. However, helical gears have lower capacity in parallel arrangements. Another typical application for helical gears is the automobile oil pump/distribution shaft. They are often compared with bevel gears for their higher capacity, and both types are effective for automotive transmissions. However, the latter require the management of heat and lubrication.
Helical gears produce large amounts of thrust. This thrust is due to the inclined angles of the teeth, which produce axial thrust loads. Thrust bearings are usually used to absorb these forces.
Applications of Helical Gears
Helical gears transfer heavy loads at a very high speed between parallel shafts. Here are the Applications of helical gears in various products.
- Automotive gearboxes.
- Printing and other machinery
- Conveyors and elevators
- Factory automation etc.
Helical Gears Advantages
Helical gears are ideal for high-load applications due to the increased number of teeth in contact during motion. They also have many uses since they can transfer movement and power on parallel and right-angled axes. Another advantage of helical gears is their large degree of coincidence, which improves the load-carrying capacity of the gear.
This large-degree coincidence also extends the gear’s life. Helical gears are also known for their durability since they distribute the load evenly over the axles, reducing wear over time. As the helical gears have a large number of teeth in contact, their engagement time is long, which helps minimize wear and tear on the teeth. In addition to extending the gear’s life, helical gears also reduce the stress on the gear, which helps reduce noise and enhance the economy of the drive. As a result, helical gears can be used at higher speeds without experiencing a significant loss of power.
When selecting a helical gear, consider how the gear will be used. This includes the design and construction of the gear, the number of teeth, the tooth angle, and lubrication. Some applications require gears with many teeth, while others require a smaller number.
Helical Gear VS Spur Gear
A helical gear has a much higher transmission capacity than a spur gear. The higher contact ratio also reduces noise and vibration. However, a helical gear is more expensive to manufacture.
A helical gear has two sets of teeth, one on each side of the axis of the gear. These teeth are cut at an angle to each other, called the helix angle. This angle determines the position of contact with the mating gear. The most basic type of helical gear is a cross-axis helical gear.
A helical gear is larger than a spur gear, which makes it easier to handle heavy loads. It also offers lower noise and more efficiency. A helical gear is usually used in mechanical systems that are designed for high speed and low noise. When deciding between the two, it is important to consider how each gear will be used.
One major difference between helical gears and spur gears is their tooth arrangement. With a helical gear, the teeth are not parallel to the gear axis, which causes vibration and reduced service life. Besides reducing vibration, a helical gear has greater speed reduction capability.
HZPT is one of the leading helical gear manufacturers and suppliers in China. We provide China helical gears of high quality at competitive prices! Contact us now if you are interested!