Description

Searching for a 9 bolt oil expeller machine manufacturer and supplier in Delhi, India? Our 9 bolt oil expeller is the heavy-duty flagship of our oil extraction lineup, designed for high-capacity oil mills and industrial oil processing plants that demand maximum throughput, maximum extraction efficiency, and rock-solid barrel integrity under the highest pressing pressures. The nine-bolt barrel clamping system is the strongest configuration available in our range, capable of withstanding the extreme internal forces generated when pressing hard, low-oil-content seeds or when pushing for the highest possible oil recovery in a single pass. Manufactured at our Nangloi, Delhi factory using premium materials and precision machining, this machine is built for round-the-clock commercial oil production.

What is a 9 bolt oil expeller machine? A 9 bolt oil expeller is a high-capacity oil screw press where the barrel is secured by nine high-tensile bolts distributed around its circumference. This bolt pattern is used on larger, more powerful expellers because the pressing forces involved are significantly higher than what a four or six bolt design can safely contain. The nine bolts ensure that the barrel segments remain tightly sealed against each other even under maximum load, preventing oil leakage through the joints and maintaining the pressure profile inside the barrel that is critical for efficient oil extraction. This machine is the right choice when you need to process more than 50 kilograms of seed per hour, when you are pressing difficult seeds that require very high pressure, or when you need the reliability of a barrel that will not flex or separate under sustained heavy-duty operation.

Key Features and Build Quality. The barrel is constructed from heavy-wall alloy steel segments, each individually machined to tight tolerances and held together by nine M27 high-tensile bolts with a combined clamping force that far exceeds the maximum internal pressing pressure. This over-engineering provides a safety margin that protects both the machine and the operator. The screw is a large-diameter forging made from specially alloyed steel that is through-hardened and then precision-ground to achieve the exact profile needed for optimal oil extraction. The screw flights in the compression zone are thick enough to resist chipping even when pressing abrasive seeds like copra or palm kernel at full capacity. The gearbox is a three-stage helical reduction unit with hardened and ground gears running on tapered roller bearings, designed to transmit up to 15 HP of motor power to the screw shaft without vibration or excessive noise. The frame is fabricated from heavy steel plate and sections, stress-relieved after welding to prevent distortion, and mounted on precision-machined mounting pads that ensure perfect alignment between the motor, gearbox, and pressing assembly. An integrated oil collection system includes a slanted tray with a built-in filter chamber that separates coarse press cake particles from the oil before it reaches your storage tank.

How does the 9 bolt oil expeller machine work? Oilseeds are loaded into the large-capacity hopper, which can hold enough material for several minutes of continuous operation, reducing the frequency of reloading. The seeds flow by gravity into the pressing chamber where the rotating screw catches them and begins the extraction process. Across the three zones of the screw, the seeds are progressively compressed until the oil is forced out through the drainage slots in the barrel. The oil cascades down the inside of the collection tray, passes through the multi-stage filter that removes progressively finer particles, and flows into your oil collection drum or pipeline. The de-oiled cake, now in hard compact flakes, is pushed out through the discharge nozzle at the far end of the barrel. On this machine, the nozzle adjustment is done with a handwheel that allows precise control of back pressure without stopping the press. This means the operator can fine-tune extraction in real time based on visual inspection of the cake and oil flow, achieving the best possible yield for each batch of seeds. The entire process is continuous and the high screw speed relative to smaller models means that seeds spend less time in the barrel but are subjected to higher peak pressures, resulting in efficient extraction in a single pass.

Technical Specifications. The 9 bolt oil expeller has a seed processing capacity of 60 to 100 kilograms per hour, making it suitable for oil mills that operate 8 to 16 hours per day and process one to one and a half tonnes of oilseed daily. The motor is 15 HP, three-phase, 415V, 50 Hz, connected to the gearbox through a V-belt drive that incorporates an overload protection clutch. The screw diameter is 85 mm with an effective pressing length of 700 mm. The barrel bore is 88 mm with nine M27 clamping bolts. The gearbox provides a reduction ratio of 22:1, giving a screw speed of approximately 25 to 30 RPM under load. The machine dimensions are approximately 1800 mm by 700 mm by 1100 mm. Weight is about 650 kilograms, reflecting the heavy-duty construction. The oil collection system includes a coarse filter screen and a fine filter mat, both of which are removable for cleaning. An optional fully automated seed feeding system with a volumetric feeder can be added for truly continuous, high-volume operation with minimal operator intervention.

Applications and Industries. This machine is the backbone of medium to large oil mills across India. It is used in groundnut oil mills in Gujarat, sesame oil mills in Rajasthan, mustard oil mills in Punjab and Haryana, sunflower oil mills in Telangana and Maharashtra, copra and palm kernel oil mills in Kerala and Tamil Nadu, and soybean oil processing units in Madhya Pradesh and Maharashtra. Beyond edible oils, the 9 bolt expeller serves industrial oil producers who extract castor oil, neem oil, and other non-edible oils for pharmaceutical, cosmetic, and chemical industries. Government oilseed processing plants and large agricultural cooperatives also rely on this model for its proven reliability and high throughput.

Benefits of Choosing Our 9 Bolt Oil Expeller. The nine-bolt barrel gives you the highest pressing pressure capability in our lineup, which translates directly into the best possible oil extraction rate, often exceeding 92 to 95 percent for well-prepared seeds. The high capacity means you can process large volumes efficiently, reducing the per-unit cost of oil production. The robust construction is designed for continuous operation, so you can run the machine for long shifts without performance degradation. The real-time nozzle adjustment lets the operator optimise extraction continuously without stopping the press, saving time and improving yield. The integrated multi-stage filtration reduces the load on downstream refining equipment, which can lower your total system cost. And the sheer durability of the screw and barrel means lower long-term maintenance costs compared to lighter-duty machines that need more frequent part replacements.

Maintenance and Care. The gearbox oil must be changed after the first 50 hours of operation and then every 400 hours thereafter under normal conditions, or every 250 hours if operating in dusty environments. The screw and barrel segments should be inspected every 100 hours of operation, and segments showing significant wear should be replaced promptly to maintain extraction efficiency. All nine barrel bolts should be checked for proper torque before every shift, with a recommended torque of 200 Newton-metres. The oil collection filters should be cleaned at the end of each shift, and the filter mats replaced weekly or as needed. Main shaft bearings require greasing every 100 hours with a high-temperature lithium complex grease. The V-belt drive should be inspected monthly for proper tension and alignment, and belts replaced at the first sign of cracking or excessive wear. Keep the machine clean and free of oil and seed debris around the motor and gearbox to prevent fire hazards and ensure proper cooling.

Frequently Asked Questions. What is the price of a 9 bolt oil expeller machine? As our highest-capacity model, the 9 bolt expeller is priced at a level that reflects its heavy-duty construction and high performance. Contact us for a detailed quotation based on your motor and accessory requirements. How many tonnes can it process per day? In an 8-hour shift, you can process approximately 500 to 800 kilograms of seed, depending on the type. Can it handle copra and palm kernel? Yes, the nine-bolt barrel is specifically designed to handle the high pressures needed for these hard oilseeds. What is the expected lifespan of the screw and barrel? With proper maintenance and regular inspection, the screw and barrel segments typically last 2000 to 3000 hours of operation before requiring replacement.

Why Choose Our Delhi Factory and How to Order. We manufacture the 9 bolt oil expeller at our Nangloi, Delhi factory using precision CNC equipment, in-house heat treatment, and rigorous quality testing to ensure every machine meets our performance standards before dispatch. Our team has decades of experience in oil mill machinery and can help you select the right configuration, recommend spare parts inventories, and design complete oil mill layouts if you are setting up a new facility. We provide pan-India delivery with installation supervision and operator training. To discuss your requirements, call us at +91 8588856870 or visit our Nangloi factory to see the 9 bolt expeller in operation. We also arrange site visits to your location to assist with installation and commissioning.