Description

Need a 4 bolt oil expeller machine manufacturer and supplier in Delhi, India? Our 4 bolt oil expeller is a compact, medium-capacity screw press designed for small to medium-scale oil extraction operations where space, budget, and ease of maintenance are important considerations. The four-bolt barrel clamping system makes this machine particularly user-friendly because it allows quick access to the screw and barrel for cleaning, inspection, and part replacement without requiring specialised tools or lengthy downtime. Manufactured at our Nangloi, Delhi factory, this expeller combines solid build quality with practical design features that oil mill operators appreciate in daily use.

What is a 4 bolt oil expeller machine? A 4 bolt oil expeller is a type of oil screw press where the barrel housing is held together by four heavy-duty bolts rather than the six or nine bolts found on larger models. This design choice reflects the machine's position as a compact unit intended for moderate throughput. The four-bolt configuration is sufficient to contain the pressing forces generated at this capacity level while making the machine lighter, more compact, and significantly easier to disassemble for maintenance. The core pressing mechanism works the same way as larger expellers, using a rotating screw inside a barrel to crush oilseeds and squeeze out oil, but everything is scaled to suit operations processing 15 to 40 kilograms of seed per hour.

Key Features and Build Quality. The frame is built from heavy-gauge mild steel channel sections welded into a rigid structure with cross-bracing for stability. The four barrel clamp bolts are high-tensile grade 8.8 fasteners that provide reliable clamping force without the weight penalty of a larger bolt pattern. The screw is machined from a single billet of case-hardened alloy steel, with a profile optimised for general-purpose oilseed pressing, meaning it handles groundnut, sesame, mustard, sunflower, soybean, and copra without needing a different screw for each seed type. The barrel is lined with hardened steel segments in the pressing zone to extend service life, and these segments can be individually replaced when they wear, rather than replacing the entire barrel. A drip tray beneath the barrel catches the extracted oil and channels it to a filter screen before it flows into your collection vessel. The hopper is generously sized to reduce the frequency of reloading, and it includes a simple safety grate to prevent hands or tools from entering the pressing chamber.

How does the 4 bolt oil expeller machine work? Seeds are loaded into the hopper, and gravity feeds them into the throat of the screw. As the screw rotates, it catches the seeds in its flights and pushes them forward into the barrel. The barrel interior gradually narrows, increasing the pressure on the seeds until the oil is expelled through the drainage gaps between barrel segments. The oil drips down into the collection tray and passes through the filter, which catches the fine particles called press mud. The de-oiled cake exits from the nozzle at the discharge end, and you can adjust the nozzle gap to control how much residual oil stays in the cake. A wider gap produces drier cake and more oil extraction, while a narrower gap produces softer cake with slightly higher residual oil but less power consumption. Most operators settle on a medium setting that balances oil yield with cake quality. The entire pressing cycle is continuous, so you feed seeds in one end and collect oil and cake from the other without stopping.

Technical Specifications. The 4 bolt oil expeller has a seed processing capacity of 15 to 40 kilograms per hour depending on the type of oilseed and the moisture content. The motor is 5 HP, available in both single-phase 220V and three-phase 415V configurations, 50 Hz. The screw diameter is 55 mm with an effective pressing length of 400 mm. The barrel clamping bolts are M20 grade 8.8. The gearbox is a two-stage helical reduction unit providing a screw speed of approximately 30 to 40 RPM. The machine dimensions are approximately 1100 mm by 450 mm by 850 mm. Weight is about 180 kilograms, which is manageable for installation in a small oil mill or even a large shop floor. The oil collection tray is made from mild steel with an optional upgrade to stainless steel.

Applications and Industries. This machine is popular among small-scale oil mill operators in rural and semi-urban areas, new entrepreneurs starting an oil extraction business, groundnut and sesame pressing units in Gujarat and Rajasthan, mustard oil producers in Punjab and Haryana, sunflower oil extraction units in Andhra Pradesh and Karnataka, and coconut oil producers in Kerala and Tamil Nadu. It is also suitable for food processing units that need to extract fresh oil from oilseeds as an ingredient rather than for bulk sale.

Benefits of Choosing Our 4 Bolt Oil Expeller. The four-bolt design means you can strip down the barrel for cleaning or screw replacement in under 15 minutes with just a spanner set, compared to 30 to 45 minutes on bolted models with more fasteners. This translates to less downtime and higher effective production time. The compact footprint means it fits in spaces where larger expellers cannot go. The versatile screw design handles multiple oilseed types, so you are not locked into pressing just one crop, which is valuable for producers who process different seeds depending on seasonal availability and market prices. The lower power consumption compared to bigger machines keeps your electricity costs down. And the moderate capacity range is perfectly suited to operations that are past the hobby stage but not yet at the level where a high-capacity industrial expeller makes economic sense.

Maintenance and Care. Check the gearbox oil level weekly and top up as needed, replacing the oil every 500 hours of operation. Inspect the screw and barrel liner segments every 100 hours and replace them when you notice a drop in oil yield or increased noise during pressing. Tighten the four barrel bolts before each pressing session because they can loosen with vibration over time. Clean the oil collection tray and filter screen at the end of each day to prevent oil residue from becoming rancid and contaminating the next day's production. Grease the main bearings every week using a standard lithium grease. Keep the hopper clean and dry to prevent seed mould, which can affect oil quality and flavour.

Frequently Asked Questions. What is the price of a 4 bolt oil expeller machine? Our 4 bolt model is priced competitively for the small and medium oil mill market. Contact us for the latest pricing and any current offers. Which oilseeds can it press? Groundnut, sesame, mustard, sunflower, soybean, copra, and similar seeds. Can it run on single-phase power? Yes, a single-phase 220V motor option is available for locations without three-phase supply. How much oil does it extract? Extraction efficiency is typically 85 to 92 percent of the oil content in the seed, varying by seed type and moisture level. What is the oil cake used for? The de-oiled cake is used as high-protein cattle feed or as a raw material in animal feed manufacturing.

Why Choose Our Delhi Factory and How to Order. We manufacture the 4 bolt oil expeller at our own facility in Nangloi, Delhi, ensuring tight quality control and affordable pricing because there are no intermediaries in the supply chain. Our engineering team understands the real-world conditions of Indian oil mills and designs machines that are tough, practical, and easy to keep running. We offer pan-India delivery, on-site installation, and training for your operators. To get a quote or discuss your oilseed pressing needs, call us at +91 8588856870. You are welcome to visit our Nangloi factory to inspect the machine and see it operating under load before making your purchase decision. Delivery is typically within two to three weeks of order confirmation.