Polimak Linear Motion Technologies is committed to delivering high-performance solutions that support critical operations across a wide range of sectors. From complex machinery to structural systems, our products are designed to meet the demanding requirements of modern industries with efficiency and precision.
We specialize in a wide range of screw jacks engineered for strength, durability, and reliable performance in demanding environments. Serving industries such as defense, manufacturing, construction, entertainment, communication, energy, and beyond, our solutions are custom-made for each unique application. Driven by 45 years of technical expertise and know-how, our engineering team partners with clients to develop application-specific screw jack systems built to meet rigorous operational and safety standards.
Solar Tracker Applications
In modern solar tracking systems, screw jacks play a crucial role in precisely adjusting the position of photovoltaic panels to follow the sun’s movement during the day. These mechanical actuators are especially valuable in large-scale solar farms where durability, load capacity, and minimal maintenance are essential. Designed to endure harsh outdoor environments, including high winds and temperature fluctuations, screw jacks offer stable and accurate motion control that helps maximize energy capture. Their ability to support heavy loads and provide synchronized movement across multiple axes makes them ideal for both single-axis and dual-axis trackers. By reducing the need for frequent servicing and improving overall system efficiency, screw jack mechanisms contribute significantly to the long-term performance and cost-effectiveness of solar energy installations.
Stage Lifting Applications
Stage lifting systems play a critical role in the entertainment industry, where smooth, synchronized, and safe movement of platforms and scenery is essential to the success of live performances. Theatre productions, orchestras, and other events often rely on elevated or moving stage elements. Polimak’s screw jack solutions offer high load capacity, precise vertical motion, and dependable synchronized lifting, making them ideal for safely raising and lowering heavy components. These systems provide quiet operation, a key requirement in performance environments, and enable multi-point lifting for stable and balanced stage movement. Safety is enhanced by equipping power screw jacks with gear reduction boxes that automatically stop motion during a power failure, preventing any unintended shifts. Additionally, their mechanical locking system holds the load in position without continuous power, ensuring both efficiency and peace of mind in stage automation systems.
Barrier Applications
Security barriers are essential for controlling and restricting vehicle access to sensitive areas such as government buildings, airports, and commercial facilities. Among these, cylindrical wedge barriers, also know as as bollards, are a common choice due to their ability to provide a strong physical deterrent.
For heavy-duty applications, especially where bollards are constructed from massive steel components weighing several hundred kilograms, translation screw assemblies serve as the most effective mechanism. Alternatives like hydraulic or pneumatic rams often bring some limitations such as high operational costs, excessive energy consumption, and the requirement for regular specialized maintenance. Screw jack systems are the ideal choice in these applications by offering quiet operation, low maintenance requirements, and environmentally conscious designs that eliminate the risk of fluid leaks or contamination. Additionally, they deliver consistent and dependable performance even under harsh weather conditions or heavy usage, making them the preferred choice for reliable and long-lasting barrier control solutions.
Satellite Antenna Applications
Satellite antennas are widely used in maintaining continuous and dependable communication across a wide range of industries including telecommunications, broadcasting, and defense. These systems require highly accurate and responsive movement to track satellites as they orbit, ensuring uninterrupted signal strength and quality. Screw jack mechanisms offer the precise torque control and robust performance necessary to manage the fast and smooth repositioning of satellite antennas, even in challenging environmental conditions such as strong winds or temperature extremes.
Our screw jacks are engineered with various load capacities and feature multiple clevis configurations to meet the specific demands of different antenna designs. Additional protective accessories enhance their durability and longevity in outdoor settings. Screw jacks have proven their value in both satellite antennas and military radar systems, offering consistent, accurate movement even when exposed to demanding operational environments. This makes screw jack systems a trusted choice for critical communication infrastructure requiring high-performance motion control.
Manufacturing Machinery Applications
Modern manufacturing systems relies on automation and precision engineering to meet high production demands and maintain consistent product quality. Within the manufacturing sector, screw jack systems provide essential support by delivering controlled, stable motion for heavy-duty equipment used in machining and metal fabrication processes. Manufacturing machinery often operates in harsh industrial environments where precision, reliability, and the ability to manage heavy loads is essential.
Screw jacks are particularly effective in applications where accurate positioning and synchronized movement are required. Their ability to integrate seamlessly into a wide variety of machine designs, such as rolling mills, presses, and assembly lines, makes them a versatile solution across the manufacturing sector. Polimak’s screw jack systems enhance operational efficiency and reduce mechanical wear, helping manufacturers meet strict tolerances while minimizing maintenance downtime. Their durability, adaptability, and precision control make them a key component in modern manufacturing machinery systems.
Aerospace Systems Applications
Precision, safety, and reliability are fundamental in aerospace operations, where every component and process must meet the most demanding technical standards. The industry covers a wide spectrum of complex systems, from commercial aircraft and satellites to unmanned aerial vehicles and orbital platforms. Supporting the assembly, inspection, and servicing of these high-value assets requires equipment that can perform with absolute accuracy under strict conditions.
Screw jack systems are a critical component in elevating and positioning platforms used during the handling of engines, fuselage sections, and other structural parts. These systems provide smooth, stable motion control, which is essential when working with delicate or heavy components that must be aligned with millimeter-level precision. Beyond manufacturing settings, screw jacks are also used in Ground Support Equipment where they contribute to the safe and efficient transfer, lifting, and adjustment of aircraft cargo and structural modules. With robust construction, integrated safety mechanisms, and customizable configurations, these systems offer aerospace engineers a dependable solution for improving workflow, enhancing operator safety, and minimizing the risk of mechanical failure.
Additional Industry Applications
Screw jacks are integral to a wide range of mechanical systems, offering dependable and precise linear motion for diverse industrial and commercial needs. Their adaptability and durability make them ideal for many specialized applications, including:
• Penstocks: Actuate the opening and closing mechanisms in water management and hydroelectric systems with controlled, reliable motion.
• Food Processing Machinery: Provide accurate positioning and movement in machines such as palletizers, enhancing efficiency and product handling.
• Crank Table Height Adjustments: Enable ergonomic and precise adjustments in industrial workstations to improve operator comfort and productivity.
• Missile Launching Platforms: Deliver synchronized, powerful linear motion critical for the safe and effective deployment of missile systems.
• Vehicle Ramps and Lifts: Support heavy loads and ensure smooth, stable operation for automotive access and maintenance.
• Scissor Lifts: Facilitate safe and controlled vertical lifting for personnel and equipment in construction and maintenance tasks.
• Airport Passenger Walkways: Allow for the smooth extension and retraction of boarding ramps, improving passenger flow and safety.
• Bath Lifts: Provide accessibility by providing secure and gentle lifting solutions for assisted bathing.
• Patient Transfer Trolleys: Offer smooth, controlled mobility to safely move patients in healthcare environments.
• Construction Equipment and Operations: Provide lifting, positioning, and stabilization support in demanding construction applications.
Screw jacks offer a powerful combination of strength, precision, and reliability. This makes them a versatile solution that continually adapts to meet the complex demands of modern industry applications.
These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
Installed below silos or hoppers, these valves are used for maintenance operations of equipment such as rotary valves, screw feeders, etc., that are positioned below the butterfly valve.
These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
In this design, the butterfly valve is sandwiched between two flanges. Rubber sealing at both faces of the valve provides a tight seal between the flanges and the wafer butterfly valve.
One side of the valve has a bolted flange connection, while the other side features a built-in short pipe designed for fixing a flexible sleeve.
These valves have bolted flange connections on both sides, making them suitable for installation on silos, hoppers, screw feeders, and similar applications.
Bulk tanker trucks or open trucks can be filled with powdered materials delivered within FIBC bags. These systems generally consist of bulk bag discharging station, mechanical or pneumatic conveyor and loading bellow. Big bag discharge station transfers the bulk solid from big bag to conveying system. Conveying system transfers it to truck loading area. And loading bellow is used to fill tanker truck without any dust emission. Since truck loading operations are done within limited time, high capacity big bag discharge systems and bulk material conveying systems are used. For short distances, screw conveyors are preferred to transfer material from big bag discharge station to truck loading chute. For long conveying distances, pneumatic conveying systems provide better service. There may exist a storage hopper or silo above bulk truck loading bellow to compensate material flow between inlet and outlet. Bulk bag discharge and truck filling systems have automatic control system that monitors product level in truck and operates all equipment accordingly. Optional weighing system can be added to measure the amount of material that is filled to truck.
Big bag discharge systems can deliver dry bulk solids in powder and granular form to weighing and batching systems. The loading hopper of the weighing system should remain full during dosing and batching. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the dosing speed and conveying distance, mechanical conveying systems or pneumatic loading systems may be used. Dust collectors can be employed to prevent dust emissions during hopper loading, especially for materials with high dust content.
Dry bulk packaging systems are used to fill powdered or granular materials into bags, drums, jars, sacks, etc. Bulk materials delivered in big bags must be transferred to packaging machines without interruption. The loading hopper of the packaging system should remain full during the filling and packaging process. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the packaging speed, mechanical conveying systems or pneumatic loading systems can be selected. Dust collectors can be used to prevent dust emissions during hopper loading, especially for materials with high dust content.
Mixer automation systems are used to mix dry bulk solids according to specific recipes. Raw materials delivered in FIBC bags can be transferred to mixing units through a combination of conveying equipment and bulk bag discharge systems. Depending on the type of application, pneumatic conveying or mechanical feeding systems can be used to fill mixers. Big bag discharge stations can be manufactured with built-in dosing systems. The amount of raw material to be loaded into the mixer is automatically controlled with the help of a weighing and dosing system. Dust collectors can be used to prevent dust emissions during the mixer filling process.
Bulk material stored in big bags can be automatically filled into small bags. Big bag discharge systems come with optional built-in bag filling units. For low filling capacities, these units are installed below the big bag discharge hopper, providing a practical and cost-effective solution. Both big bag discharging and bag filling operations can be handled by a single, compact system. For higher bag filling needs, bag filling machines are installed near the bulk bag discharge stations. Pneumatic conveying systems or mechanical conveyors can be used to transfer bulk material from the FIBC bag discharge station to the bag or sack filling system.
Mechanical conveyors can be used for silo loading from big bag discharge stations. Screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to big bag discharge stations to fill silos. The selection of conveying equipment directly depends on the conveying distance, height, transferred material, and capacity. Bucket elevators are preferred for high silos, while screw feeders are preferred for shorter silos and short distances. The big bag discharge system can be installed on top of the silo for faster filling. In this case, rotary valves or butterfly valves are better choices as they provide simple flow control. Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air content in the silo escapes to the atmosphere and carries some dust along with it. Vacuum fans and jet filters in dust collectors prevent dust emissions into the environment. The collected dust is sent back to the silo, thus preventing product loss.
Pneumatic conveying systems installed after bulk bag discharge units transfer bulk material through conveying pipelines to fill silos. This configuration is useful in applications where high transfer rates and long conveying distances are needed. In production lines where raw materials are stored in warehouses far from storage silos, bulk bag discharge stations can be installed close to the warehouses, and pneumatic conveying systems are used to fill silos from long distances. This design reduces the need for forklifts and cranes for bulk material transfer on the production site and increases overall efficiency.
Pneumatic conveying systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Pneumatic conveying systems installed after bag dump units transfer bulk material through pipelines to fill silos. This configuration is ideal for applications requiring high transfer rates and long conveying distances. In production lines where raw materials are stored in warehouses far from storage silos, bag dump stations can be installed close to warehouses, allowing pneumatic conveying systems to transport materials over long distances. This design reduces the excessive use of forklifts and cranes for bulk material transfer within the production site, improving overall efficiency.
Pneumatic transfer systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on factors such as the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Mechanical conveyors can be used for silo loading from bag dump stations. In this configuration, screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to bag dump stations to fill silos. The selection of conveying equipment depends on factors such as conveying distance, height, material properties, and capacity. Bucket elevators are preferred for high silos, while screw feeders are ideal for shorter silos and short distances. Bag dump systems can be installed on top of the silo for faster filling. In such cases, rotary valves or butterfly valves are better choices as they provide simple flow control.
Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air inside the silo escapes to the atmosphere, carrying dust particles with it. Dust collectors equipped with a vacuum fan and jet filter capture airborne dust. The collected dust is returned to the silo, preventing product loss and ensuring a cleaner environment.
The inlet skirt is an optional feature designed to extend the lifespan of the flexible connector sleeve. Its upper portion is attached to the outlet port of the upstream equipment and extends down into the bin activator’s inlet port. The primary function of the inlet skirt is to serve as a protective shield, safeguarding the flexible connector seal from wear and damage.
A vibratory motor is externally mounted to the bin activator. When powered, the motor generates vibrations that facilitate a steady flow of dry bulk materials within the system. Depending on the application requirements, one or two vibratory motors can be installed externally.
To accommodate a bin activator, the cone of a silo must be shorter than usual, resulting in a wider outlet. A flange supplied with the bin activator is separately welded to the silo’s outlet, slightly above the opening, at the production site. Once installed, the vibrating bin discharger is securely bolted to the flange, ensuring a stable and reliable connection.
Special spring suspension links and an engineered polymer seal work together to create a flexible connection between a vibrating bin discharger and the equipment positioned above it.
The proper design and installation of the polyurethane seal prevent it from slipping off and ensure a secure seal, eliminating the risk of dry bulk material leakage. Additionally, the seal offers high stress resistance and long-term durability, withstanding stresses caused by motor vibrations, pressure conditions, and other operational factors.
Externally installed spring suspensions provide full resilience to the vibrations of the cone head. They ensure that the generated vibrations affect only the cone itself rather than the upstream equipment structure.
An internally tapered, conical-shaped baffle plate is positioned at the center of the bin activator’s diameter. The baffle is rigidly attached to the equipment body using structural steel components. It facilitates bulk material flow from upstream equipment by directly inducing vibrations into the material.
A secondary deflector plate reduces the weight of the bulk material in the lower portion of the bin activator by acting as a wedge beneath the material, directing it around the areas adjacent to the cone’s surface.
Polimak baffle plates are available in various configurations, including convex and cone plates, and in different angles (15°, 30°, 45°, or even 60°) depending on the flow characteristics of the handled bulk material and the specific application requirements.
