EA transmission is a machine in a power transmission system, which provides controlled application of power. Often the term 5-speed transmission refers simply to the gearbox, that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device.


The new patented “BOX” series of worm gear units is made with die-casting aluminium housing from size 30 up to 90, and in cast iron from size 110.

The whole BOX series can be mounted in any position with no need of specifications in the order. The most basic definition of a gearbox is that it is a contained gear train, or a mechanical unit or component consisting of a series of integrated gears within a housing.In the most basic sense, a gearbox functions like any system of gears; it alters torque and speed between a driving device like a motor and a load.

The first step in the gearbox design process is to select the material. A material is to be selected by doing intensive research on the properties of the various materials. A material is to be selected keeping in mind the various parameters like strength, weight, durability, cost and other parameters.

The purpose of a gearbox is to increase or reduce speed. As a result, torque output will be the inverse of the speed function. If the enclosed drive is a speed reducer (speed output is less than speed input), the torque output will increase; if the drive increases speed, the torque output will decrease.


ROBUS is the new range of in-line helical reducers of Rotomotive, made in cast iron, with a capacity of up to 4300Nm.


• Torque Capacity : 60000 NM
• Reduction Ratio : 9.1 onwards
• Power Rating : 75 kW
• Input Type : Free, Hollow, Motor
• Mounting Type : Foot, Flange, C-Flange, Agitator


• Torque Capacity : 1,000,000 NM
• Reduction Ratio : 3.48:1 onwards
• Power Rating : Up to 500 kW
• Mounting Type : Foot/Flange/Face
• Input Type : Free, Hollow, Motor


• Drum Diameter : 140 to 800 mm
• Drum Length : 400 to 1400 mm
• Power Rating : 75 kW
• Drum Type : Steel, rubber lagged


• Diameter Range : 150 to 400 mm
• Reduction Ratio : 10 approx.
• Torque rating : 5000 NM.
• Power Rating : 037 kW to 37