The "screw" or worm shaft is the absolute heart of an oil expeller. It is the component physically responsible for generating the immense mechanical pressure required to crush oil out of seeds. If the screw geometry or metallurgy is flawed, your machine will consume power while producing terrible oil yields.
Understanding Screw Size & Capacity
Screw size dictates chamber capacity. A larger diameter and longer worm shaft allow more seeds to enter the feed zone and be processed per hour. A TechVMouta 7.5 HP unit utilizes a compact, highly precise shaft ideal for 50-60 kg/hr, while our massive 30 HP industrial units deploy vastly larger, multi-stage screws to handle 400+ kg/hr.
The Metallurgy Imperative: EN31 Alloy
Because the screw constantly grinds against abrasive seeds (like mustard or copra) under extreme pressure, standard mild steel will wear down within weeks. As the screw threads wear out, the gap inside the chamber widens, and your oil yield plummets. At TechVMouta's Bulandshahr manufacturing plant, every commercial worm shaft is forged from High-Carbon EN31 Alloy Steel. This guarantees exceptional wear resistance and maintains maximum extraction efficiency over the long term.
The Multi-Stage Pressing Advantage
A true commercial screw does not have uniform threads. TechVMouta engineers design our worm shafts with multi-stage compression zones. As the seed travels forward, the available volume inside the chamber decreases. This geometric compression naturally squeezes the oil out through the cage bars without relying on dangerous external heating elements.
The result? A premium, cold-pressed "Kachi Ghani" oil, and an incredibly thin, dry oil cake, proving that no residual oil was left behind.
Frequently Asked Questions
Don't Lose Oil to Poor Engineering
Maximize your seed yield with TechVMouta's EN31 multi-stage cold press expellers.
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