An Oil Press Machine is a mechanical or electric device used to extract edible or industrial oil from oil-bearing seeds and nuts such as groundnuts, sunflower seeds, sesame, soybeans, and palm kernels. It is widely used in households, small businesses, and large-scale processing industries. The machine typically consists of a feeding hopper, a pressing chamber with a screw (auger) shaft, a motor or engine, a heating system (in some models), an oil outlet, and a residue (oil cake) outlet. The pressing parts are usually made of strong steel or stainless steel to withstand high pressure and ensure hygiene.

In operation, cleaned and sometimes preheated seeds are fed into the hopper. The motor drives the screw shaft inside the pressing chamber, which rotates continuously and pushes the seeds forward. As the seeds move through the narrowing chamber, they are subjected to high pressure and friction, causing the oil to be squeezed out. The extracted oil flows through small openings and is collected from the oil outlet, while the solid residue (oil cake) is compressed and expelled through a separate outlet. Some machines use controlled heating to improve oil yield and reduce viscosity. The process is continuous, efficient, and produces clean, natural oil suitable for cooking or other uses, while the by-product can be used as animal feed or fertilizer.