What are Helical Gear Boxes and What they are used to do?

 



What Are Helical Gear Boxes?

Helical gear boxes are mechanical components that are employed to convey power and decreased velocity in between a motor and a machine. The helical gears they use are cut at an angle (helix angle) and not straight across as is the case with the spur gears.
Due to such an angled design, the gears interact with each other in a more smooth and gradual manner. This forms helical gear boxes:

  • Quieter in operation
  • More efficient
  • Able to manage increased loads.
  • Fits well in continuous heavy duty usage.

They are common in the cement, steel, power plants, conveyor, crushers, packaging and handling materials, and systems.

Primary Building Blocks of Helical Gear Boxes.

An ordinary helical gear box comprises of:

  • Helical gears - Pass on torque and slow down speed.
  • Input shaft -Attached to the motor.
  • Output shaft – Provides lower speed and more torque.
  • Bearings- Bearings Support rotating shafts.
  • Housing (casing) -Covers internal parts.
  • Lubrication system -Lessens heat and friction.

Helical Gear Boxes: How Do They work?

The principle that helical gear boxes operate on is the reduction of speed and multiplication of torque.

Here’s how the process works:
    1. The motor is an electric motor that rotates the input shaft in high speed.
    2. The first helical gear rotates with the input shaft.
    3. The angled teeth slowly intertwine with the mating gear.
    4. Speed decreases and torque is an increase.
    5. The controlled rotating output power is supplied to the machine by the output shaft.

Due to the angulation of the teeth, the teeth are in contact with more than one at a given time.
This provides:
  • Smooth power transmission
  • Less vibration
  • Lower noise
  • Better load distribution

Why Are Helical Gears Angled?

The (helical) angled design permits:

  • Not in an abrupt way, but progressively.
  • Increased load carrying capacity.
  • Greater efficiency than spur gears.

But the angled teeth also provide axial thrust and hence the need to have right bearings within the gear box.

Types of Helical Gear Boxes

    1. Single Helical Gear Box - Uncomplicated design when moderate loads are to be applied.
    2. Double Helical (Herringbone) Gear Box -Eliminates the axial thrust.
    3. Parallel Shaft Helical Gear Box - This is applied in conveyor and crushers.
    4. Right Angle Helical Gear Box- Narrow design to embrace space-saving installations.

The benefits of Helical Gear Boxes.

  • High efficiency (up to 95–98%)
  • Quiet operation
  • High torque transmission
  • Long service life
  • Fit to work round-the-clock.

Helical Gear Boxes are used in applications like these.

The helical gear boxes are applied in:

  • Cement plants
  • Steel rolling mills
  • Sugar industries
  • Material handling systems
  • Conveyor systems
  • Extruders
  • Packaging machines
  • Power transmission systems

Conclusion

Helical gear boxes are highly efficient power transmission systems that use angled teeth gears to provide smooth, quiet, and high-load performance. Their ability to reduce speed while increasing torque makes them essential in heavy industrial applications. Because of their durability and reliability, they are one of the most widely used gear box types in modern industry. Our expert team is ready to assist you with product selection, customization, and technical support to meet your operational requirements.
Contact Kavitsu Transmissions Pvt. Ltd. today for durable, efficient, and cost-effective transmission solutions tailored to your industry needs.
Reach out to us now for inquiries, quotations, or technical assistance.

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