Selecting an appropriate industrial gearbox in India is not just about the power of the motor required. The engineers should take into account the speed of output, torque, gear ratio, loads, number of hours of operation, type of mounting, environment, and application. There are certain types of industries where choosing the right gearbox is essential for equipment durability and maintenance.
What Is an Industrial Gearbox?
Industrial gearbox is a device for power transfer between the motor and the driven equipment with modification of speed and torque. The gearbox makes use of various gearing systems to either decrease or increase the speed and provide the necessary torque.
In a case where the motor has a speed of about 1,440 RPM while the conveyor requires an output speed of about 50 – 100 RPM, then an appropriate gearbox will be able to reduce the motor speed and increase the output torque.
The appropriate gearbox becomes the link between the motor’s running speed and the requirement of the equipment.
Types of Industrial Gearboxes in India
Different industrial applications require different gearbox designs. The most common types include helical, worm, bevel-helical and helical-worm gearboxes.
Helical Gearbox
Helical gearboxes employ angled teeth which allow the slow engagement of the teeth of the gears. This type of gearbox finds application in those instances where there is the need for efficient transfer of energy, continuous operation and high torque capabilities.
Applications of helical gearboxes include:
- Conveyors
- Mixers
- Material handling equipment
- Industrial machines
- Process equipment
Transpower Technologies manufactures Rotomotive ROBUS helical gearboxes which have a product line up to 4300 Nm torque and 0.5 to 425 HP output power.
Worm Gearbox
Worm gearboxes make use of a worm screw and worm wheel to transmit power. Their use is common where compact design and high speed reduction are needed.
Examples of their use include conveyors, packaging machines, material handling machines and other systems where speed reduction required makes the use of worm gearbox ideal.
One of the worm gearbox ranges available for industrial application is the Rotomotive QUBO. Sizes ranging from 25 to 150 are included, with both aluminium and cast iron versions available depending on the size.
Bevel-Helical Gearbox
The bevel-helical gearbox combines bevel gears and helical gears for effective power transmission and also to facilitate any modification in the direction of power transmission.
Such types of gearboxes are suitable for those cases where there is a need for specific orientation of the shaft and also for effective torque transmission.
Helical-Worm Gearbox
Helical worm gearing incorporates two kinds of gearing to create a unit that is compact and has beneficial speed reduction capabilities.
Such gear boxes may be used where space, speed reduction, and machine construction become critical criteria.
Industrial Gearbox Applications in India
Industrial gearboxes are used across a wide range of manufacturing and process industries. The required gearbox specification changes according to the driven equipment and operating conditions.
Conveyor Systems
The use of conveyors is perhaps the most typical application of gearboxes in industry settings. The function of the gearbox here is to reduce the motor speed as well as supply the required torque for conveyor loading.
Factors that need to be taken into consideration when selecting conveyors include:
- Speed of conveyor required
- Power of the motor
- Starting torque
- Type of operation (whether continuous or intermittent)
- Loading of the conveyor
- Ratio of gears
- Shafting arrangement
For conveyor running continuously in a factory setting, selection of the gearbox should be done based on the actual load encountered rather than just the horsepower of the motor.
Chemical and Petrochemical Plants
Chemical plants generally run their machines for long periods and are liable to subject their machinery to dust, water, chemicals, or even high temperature.
The choice of the gearbox should take into account the operating conditions, the lubrication, housing, mounting, and maintenance access.
The gearbox should also be compared with the duty cycle and torque requirements of the machine being driven.
Textile Machinery
Speed control and consistent running are critical requirements of textile machines. Gearboxes may be found in winding, conveying, spinning, processing and other machines.
Speed ratio and output speed play a vital role because a slight variation in the machine’s speed could have an impact on the process of manufacturing.
Cement and Heavy Industries
High loading, constant running, and difficult starting conditions can be characteristic of cement plants and other heavy industries.
Conveyors, feeders, mixers, and material handling equipment are among such applications. Output torque, service factor, duty cycle, shock loading, and hours of running are of special importance.
Food Processing Equipment
The gearbox is also utilized in mixers, conveyors, packing machines, and processing machinery for foods production.
In such machines, the gearbox specifications need to be chosen depending on the load and working conditions of the machine.
How to Select an Industrial Gearbox in India
Selecting a gearbox should start with the driven machine rather than the gearbox catalogue. Before requesting a quotation, plant engineers should establish the basic operating parameters.
Calculate the Required Torque
Torque is among the most important factors that must be considered during the selection of a gearbox.
If the gearbox has inadequate torque rating, it will undergo unnecessary heating or even failure of gears under continuous or impact loadings.
Therefore, engineers must give the manufacturer the exact load of the machine, output speed, power of the engine, and operating cycle.
Check the Service Factor
Service factor considers the differences in operating conditions such as load profiles, starting and operating cycles.
An equipment that operates continually, with frequent start and stop cycles, requires a different rating of the gearbox than another that runs only a few hours a day with constant loads.
It is recommended that the selection procedure of the gearbox manufacturer is applied to find the right service factor.
Check Mounting Arrangement
Another practical consideration is gearbox mounting.
The type of gearbox mounting required depends upon the type of machine.
Improper selection of mounting may cause problems even though the gearbox has sufficient torque and speed capacities.
Select the Appropriate Gearbox Type
The application is to decide upon the gearbox design.
For instance, one would need a different type of gearbox for a conveyor system that must operate continuously and with high efficiency than for a compact unit that needs speed reduction.
However, selection of helical or worm gearboxes should not be based solely upon cost. Efficiency, number of operating hours, torque, space, and operating costs also must be considered.
Industrial Gearbox Selection: Key Parameters
| Parameter | What to Check | Why It Matters |
| Motor Power | HP or kW | Establishes available input power |
| Input Speed | RPM | Determines required reduction |
| Output Speed | RPM | Must match driven equipment |
| Gear Ratio | Example: 20:1 | Determines speed reduction |
| Output Torque | Nm | Determines load-handling capability |
| Duty Cycle | Continuous/intermittent | Affects gearbox sizing |
| Service Factor | Application dependent | Accounts for operating conditions |
| Mounting | Foot/flange/hollow shaft | Ensures mechanical compatibility |
| Environment | Dust, moisture, temperature, chemicals | Influences gearbox configuration |
| Lubrication | Oil type and operating conditions | Supports reliable operation |
Rotomotive Gearbox Options for Industrial Applications
For Indian industrial applications, the gearbox series needs to be considered keeping in mind the machine requirement.
Transpower Technologies provides the gearbox solutions from the Rotomotive range, which includes ROBUS helical and QUBO worm gearbox series.
The ROBUS series has a cast iron construction and offers IEC flange and hollow shaft configurations among others. The specification also mentions that it uses synthetic oil and has a torque rating up to 4300 Nm.
The QUBO series is offered in size 25 to 150 and has an aluminium construction from size 25 to 90 while cast iron construction for sizes 110 to 150. The lubrication configuration varies by gearbox size.
Common Industrial Gearbox Selection Mistakes
A common error involves choosing a gearbox based solely on motor HP. A 10 HP motor does not automatically imply the choice of the correct gearbox since output speed, torque, load, and duty cycle requirements will differ widely from one machine to another.
Starting and shock loads should not be disregarded. The needs of a machine that starts under heavy load may be considerably different from those of one starting without much mechanical load.
The mounting method is commonly forgotten about. It must be established before ordering the shaft diameter, output type, mounting dimensions, and available installation area.
Lastly, do not choose a gearbox based on its price alone. An improperly sized gearbox could lead to maintenance, downtime, and replacement costs once in use.
The above information serves as good information for engineers, but they need to keep the whole machine requirement in mind before selecting.
Why Choose Transpower Technologies for Industrial Gearbox Requirements?
Transpower Technologies, located in Makarpura GIDC, Vadodara, Gujarat, has more than 70 years of experience in providing industrial electrical and electromechanical products.
It provides industrial products in industries like chemical industry, pharmaceutical industry, textile industry, cement industry, food processing industries, and others. It has Rotomotive gearboxes for different applications.
Being experienced in catering to the needs of industrial customers from Gujarat, Transpower Technologies is capable of assisting purchasers in identifying technical specifications before deciding on the configuration of their gearbox.
For any other related industrial equipment, we also offer motors and Siemens switchgear.
Final Takeaway
Choosing an industrial gearbox in India needs much more than just comparing gearbox size to motor HP. Speed, torque, ratio, duty cycle, service factor, mounting method, and operating conditions all play a role in the right selection.
If you need an industrial gearbox solution in Gujarat, please reach out to Transpower Technologies for application-specific gearbox recommendations and Rotomotive gearbox solutions.
