Frequently Asked Questions

A worm reducer is a right-angle gearbox (the angle between input and output shafts is 90 degrees) that allows the greatest speed reduction in the smallest possible dimensions.

Bevel gearboxes are another type of right-angle gearbox that offer significantly higher efficiency compared to worm reducers, but they are typically manufactured for low reduction ratios. When a 90-degree power transmission with a low reduction ratio is required, bevel gearboxes are an excellent choice.

Helical gearboxes offer higher efficiency and can handle greater output power and torque. Direct-shaft helical gearboxes are generally less expensive than conventional parallel-shaft gearboxes, while parallel-shaft gearboxes provide more features and capabilities.

Worm gearboxes are used for low to medium power applications. They offer lower initial cost, higher reduction ratios, and high output torque in a compact size. Helical gearboxes are used for higher power and continuous operation, especially when efficiency and long service life are more important to the user than the initial cost.

The advantages of hardened and ground gears are as follows:
• Lower noise
• Higher efficiency
• Greater load capacity
• Longer service life

Some of the most common reasons are:
• Incorrect selection of the gearbox for the intended application
• Changes in motor power or input speed
• Improper alignment and installation of couplings and connections
• Incorrect or insufficient lubrication
• Inadequate maintenance (Preventive Maintenance, PM)

Yes. If the appropriate service factor is observed and the correct gearbox is selected, they can be operated continuously.

Backlash is the free play or clearance between two mating gears.

Yes. Backlash is present in standard applications to prevent the gears from seizing due to thermal expansion from operation and friction, which could otherwise damage the gearbox. For specific applications requiring minimal backlash, zero-backlash gearboxes are available and must be specified when ordering.

Synthetic oils provide better performance compared to mineral oils and are particularly useful when gearboxes operate under conditions such as:
• High or low ambient temperatures
• Heavy loads
• Continuous operation
• Limited possibilities for proper maintenance (PM)

Most gearboxes are designed for a maximum input speed of 1400 RPM. Using a higher input speed is only permitted if specified at the time of order and approved by the engineering department.

Yes, but it is not recommended. Generally, motors with power exceeding the gearbox’s rated capacity should be avoided, as the gearbox components and system parts would be at risk of failure. This is because the gearbox is designed based on the power absorbed by the gearbox and the machine, not the installed motor. Using a larger motor is only permissible if it can be ensured that it will not operate under conditions where excessive connections or transmitted power might exceed the gearbox’s rated limits.

Yes. By applying the appropriate service factor, the gearbox can be operated in both directions of rotation, clockwise and counterclockwise. The value of this factor is 1.2, which must be multiplied by the service factor.

No. Doing so creates a bending moment at the motor–gearbox connection, which can lead to the following issues:
• Noise generation
• Increased gearbox temperature
• Shaft failure
• Oil leakage from the input shaft oil seal
In cases where the motor weight is high, a support should be installed between the motor feet and the chassis.

Yes, but attention must be paid to the position of the oil plugs.
In most gearboxes, there are three types of oil plugs:
1 - Oil filling plug
2 - Oil level plug
3 - Oil drain plug
In most cases, the oil filling plug is used as a breather plug. A hole with a diameter of 1 mm is provided at the center of this plug to vent the air inside the gearbox. Depending on the type of order, the positions of these plugs may be changed for different mounting configurations. When changing the mounting position, please pay careful attention to the location of the oil plugs.