A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which usually mesh with another toothed part to transmit torque.
Two or more gears working in a sequence are called a gear train.
These training models are highly useful for demonstrating the most fundamental and frequently used mechanism and are very useful for engineering students.
All the components are made with a high degree of precision.
These modules are assembled on transparent Perspex sheets to facilitate teaching.
They are easy to assemble or disassemble.
These models help students to understand how the geared train arrangements can produce a mechanical advantage through a gear ratio and thus may be considered as simple machines.
Also students can appreciate that although the gears in a transmission are analogous to the wheels in a crossed belt pulley system, an advantage of gears is that the teeth of a gear prevent slippage.