In the world of metalworking, precision is everything. When it comes to producing highly accurate, clean-edged components with tight tolerances, fine blanking stamping emerges as a cutting-edge solution. But precision doesn’t come from machinery alone — it requires the perfect synergy of process, materials, and support systems. What is the One often-overlooked factor that plays a critical role in the success of fine blanking?
What is Fine Blanking Stamping?
Fine blanking is a specialized stamping process used to produce precise and flat metal parts with smooth, burr-free edges — typically in a single stroke. Unlike traditional stamping or shearing, fine blanking utilizes:
A triple-action press (punch, counter punch, and die)
High-pressure clamping
Very small clearances between tool and workpiece
This results in superior dimensional accuracy and an almost entirely sheared surface — making it ideal for parts like:
Gears
Automotive components
Clutch parts
Precision washers
Electronic connectors
Why Metal Forming Fluids Matter in Fine Blanking
Fine blanking might seem like a dry mechanical process, but in reality, lubrication is essential to its efficiency, tool life, and finished part quality.
Here’s why metal forming fluids are indispensable:
1. Minimizing Friction and Wear
The immense pressure involved in fine blanking creates high friction between the punch, die, and workpiece. Without proper lubrication:
Tools wear out faster
Surface defects may occur
Edge quality decreases
Metal forming fluids reduce this friction, allowing cleaner cuts and extended tool life.
2. Controlling Heat Generation
High-speed, high-force operations generate significant heat, which can:
Distort workpieces
Reduce material flow control
Cause premature tool failure
Cooling agents within metal forming fluids dissipate heat, maintaining thermal stability during the process.
3. Improving Surface Finish
A high-quality metal forming fluid ensures:
Minimal burr formation
Smoother part surfaces
Reduced need for secondary finishing operations
This is critical in industries like automotive or electronics, where surface quality and tolerances are non-negotiable.
4. Preventing Galling and Adhesion
Under high pressure, metal can stick to tooling — a phenomenon known as galling. Metal forming fluids act as a barrier to prevent adhesion, preserving both tooling and part integrity.
What to Look For in a Fine Blanking Lubricant?
Not all fluids are created equal. For fine blanking, ideal metal forming fluids should offer:
High-pressure resistance (EP performance)
Excellent cooling and lubricating ability
Compatibility with a wide range of metals (steel, aluminum, etc.)
Minimal residue and easy cleanability
Environmental and operator safety compliance
Synthetic and semi-synthetic fluids are increasingly popular due to their consistent performance and eco-friendly formulations.
Boost Your Fine Blanking Efficiency with the Right Fluid Partner
Fine blanking is about pushing the limits of precision — and every detail matters. By choosing the right metal forming fluid, manufacturers can:
Improve part quality
Extend tool life
Reduce downtime
Lower overall production costs
At [Your Company Name], we provide high-performance fine blanking lubricants tailored to your specific materials and production conditions. Whether you’re producing clutch plates or intricate electrical connectors, we help you stay sharp — cut after cut.
Please contact us to learn how the right metal forming fluid can transform your fine blanking operation.
Fine blanking is a high-precision metal stamping process developed in Switzerland in the 1920s. The term itself means “precise blanking,” referring to the process of punching out parts with extremely smooth and accurate edges using plastic deformation under high compressive stress, a phenomenon known as the hydrostatic pressure effect. This effect enhances the ductility of the material, allowing for clean shearing.
Unlike traditional machining methods like turning, which create chips, fine blanking forms parts directly through pressing, making it ideal for mass production of complex components—particularly in the automotive industry. Though its working principle is similar to punching, blanking differs in that the cut-out portion is used as the product, whereas punching typically uses the remaining sheet.
Fine blanking stands out from general blanking when higher surface quality, precision, and dimensional consistency are required.
3 Key Advantages of Fine Blanking
1. Exceptionally Smooth Cut Surfaces Fine blanking delivers clean, straight sheared edges across nearly 100% of the cut surface. In contrast, conventional blanking typically results in about one-third sheared surface and two-thirds fracture surface. The difference is similar to slicing a watermelon with a knife versus breaking it apart by hand—visibly and functionally significant.
The surface roughness from fine blanking ranges from Ra 0.4 to 1.6 μm, much smoother than conventional blanking or machining. Because of this, parts often require no secondary finishing, improving cost-efficiency.
2. Combined Forming Reduces Manufacturing Costs Fine blanking isn’t limited to flat parts. It also enables simultaneous operations like bending, coining, and extrusion—features that add detail or functional shapes in one stroke. This capability shortens production steps, leading to significant cost savings.
3. Superior Quality Through Triple-Force Mechanism While standard blanking relies solely on downward punch force, fine blanking uses three coordinated forces: clamping force (with a V-ring to fix the sheet), punch force, and counterforce from an ejector below. This triple-force setup yields higher accuracy, flatness, and perpendicularity.
The V-ring creates grooves that securely fix the sheet, minimizing movement and improving the sheared edge’s perpendicularity. The balanced top-down pressure also prevents material warping and deformation.
Equipment & Maintenance Considerations
Fine blanking setups require specialized, high-cost equipment including:
Uncoilers to feed steel coils
Levelers to flatten the material
Roller feeders to control sheet advancement
Maintenance costs are approximately 10% higher than those for standard blanking systems due to the need for precise die assembly and disassembly.
Die life typically ranges from 500,000 to 1,000,000 strokes. Longevity depends on factors such as blanking depth accuracy, press rigidity, counterforce balance, material feed consistency, die setup precision, and heat treatment quality.
Material Selection
Fine blanking imposes stricter material requirements than conventional blanking. The shearing speed is slower—typically 5 to 15 mm/sec compared to 50 to 100 mm/sec for general blanking—allowing around 30–35 strokes per minute. Thicker or higher-tensile materials reduce the processing speed even further.
Materials must exhibit adequate ductility or malleability to prevent cracking and ensure clean shearing. Additionally, to achieve high-quality edges, cold-rolled sheets with spheroidized microstructures are preferred, adding about 5–10% to material costs.
Growing Applications and Hybrid Techniques
Fine blanking is increasingly used in combination with forging, sintering, casting, and machining to streamline manufacturing, reduce costs, and improve strength or weight performance.
Advancements in press capacity, die material, and surface treatments now enable fine blanking for larger parts and more challenging materials—broadening its application to industrial machinery and structural components.
Lubricant Selection for Fine Blanking
Since fine blanking includes elements of drawing, high-viscosity lubricants are essential. Without proper lubrication, cold welding and tool wear become severe, compromising surface quality and dimensional accuracy. The wrong lubricant can reduce tool life and degrade product quality.
Always select lubricants based on material type and thickness. For further guidance, consult lubricant specialists Dyna Co., Ltd.
From phone charging cables and telephone communication lines to data cables connecting PCs to the internet, and various memory card modules in automotive navigation systems — connectors have long been the invisible enablers of our daily digital lives.
Although wireless technology is advancing rapidly, we still face numerous technical challenges before everything can be fully wireless. For now, and the foreseeable future, wired connectors and plug-in components remain essential across virtually every sector — from consumer electronics to automotive and industrial applications.
Evolving Connector Types and Increasing Complexity
Even something as simple as a PC-to-monitor cable has evolved dramatically — from VGA (RGB) to DVI, and now to HDMI and DisplayPort. Similarly, charging cables for Android smartphones have gone through multiple format changes, driven by the push for faster data transfer, smaller form factors, and higher power efficiency.
As devices shrink and demand faster speeds, connector modules have become increasingly intricate in structure, all while adhering to international standards for compatibility. These modules — found at the ends of cables or within electronic assemblies — require precision-manufactured components that ensure secure, stable connections.
Where Punching Oil Comes In
To manufacture these connectors, raw materials like aluminum and copper undergo various forming and stamping processes using press machines. One key material used in these high-speed, high-precision operations is punching oil.
As materials get thinner and more diverse due to technological advances, the requirements for lubricants used in stamping processes become more demanding. Punching oil not only facilitates smooth metal deformation but also helps preserve die life and ensure clean, burr-free edges.
Unlike larger automotive parts such as motor cores or radiators (where punching oil is also used), connectors are smaller and more complex — requiring even more specialized formulations of lubricants that can withstand tight tolerances and high repetition rates.
Rising Demands from the EV Boom and Miniaturization Trend
The shift toward electric vehicles has led to an exponential increase in the number of electronic and communication components in modern cars. This growth is pushing suppliers to improve their manufacturing processes, materials, and lubricants to meet ever-more stringent standards set by global OEMs.
Many manufacturers, including those in connector production, are now handling a wide variety of parts. Depending on material type, shape, and size, a mix of lubricants — such as drawing oils, fine blanking oils, and punching oils — may be required. In the past, many companies relied heavily on imported lubricants. However, domestic Korean alternatives have since caught up in both performance and reliability.
Despite this progress, some manufacturers still cling to costly imports, doubting the quality of local products. We believe this mindset needs to shift — and fast.
Our Commitment
Our company proudly supplies punching oil to leading Korean conglomerates under approved vendor agreements. We also export our products to major global corporations, where performance and consistency are critical.
We don’t just sell — we collaborate. When approached with a new item or requirement, we thoroughly analyze the customer’s manufacturing process, materials, and equipment to develop the optimal solution. At the same time, we strive to offer cost-effective products without compromising on performance.
As the industry continues to evolve, so too does our dedication to innovation — in formulation, application, and customer support.
From the charging cables we use with our smartphones to the communication cables connecting telephones, PCs, and monitors — and even the memory cards and navigation systems in our vehicles — connectors and connection components have been a vital part of our everyday lives for decades.
Despite the surge in wireless technologies in recent years, truly wireless environments remain a distant goal. Numerous technical challenges still stand in the way, and in the meantime, physical connection components like cables and plug-in modules continue to play a critical role across virtually every industry.
Miniaturization and Complexity: The Evolving Cable Interface
Cable connectors — especially those at the ends of communication lines — are now more complex and compact than ever before. To ensure compatibility across various devices, these modules are standardized globally. As data transmission speeds increase, so too does the complexity of connector structures.
For example, the cable used to connect a PC to a monitor has evolved significantly over time, moving from RGB to DVI, and eventually to HDMI, as shown in the image below. Similarly, charging ports for Android smartphones have gone through multiple iterations in a short span.
Each device requires a compatible connector module to establish a secure and functional connection. To manufacture these connector components, precision stamping processes are used — and stamping oil plays an essential role in ensuring the quality and reliability of these operations.
Connectors are typically made from materials like aluminum or copper, which undergo various machining and stamping processes to be formed into intricate shapes. As manufacturing technology continues to advance, the materials used are becoming more diverse, and the thickness of components is decreasing. This evolution increases the technical demands placed on suppliers, making development more challenging than ever.
EV Growth Drives Demand and Innovation
The rapid growth of electric vehicle (EV) production has led to a dramatic increase in the number of in-car electronic systems and communication devices. Naturally, this has also triggered a surge in the demand for associated components — and a parallel need for technical innovation.
In a previous blog post, we introduced how stamping oil is used in the production of motor cores and radiators. Compared to these larger components, connectors are far smaller and more intricate, requiring highly precise stamping molds. Stamping oil must also evolve alongside these tools to meet the increasing demands of miniaturization and complexity.
Supporting Diverse Manufacturing Needs
Many companies that manufacture connectors also produce a variety of other precision components. Depending on the shape, size, and material of each product, a wide range of specialized oils may be required — such as drawing oils and fine blanking oils. While imported lubricants were common in the past, most companies today have transitioned to reliable Korean-made alternatives.
That said, there are still companies that hesitate to trust domestic products, choosing instead to continue using expensive imported oils out of habit or caution. We believe it is time for this mindset to change.
Our Commitment to Innovation and Global Quality
Our company is proud to be an approved supplier to major Korean conglomerates and also exports its products to globally renowned manufacturers. We actively collaborate with clients to understand their processes and equipment, developing optimized products that not only meet technical demands but also help reduce production costs.
Through continuous innovation and close customer collaboration, we aim to provide stamping oils that meet the highest global standards while contributin
Thanks to its unique properties, aluminum plays a critical role in various industries. Due to its lightweight and corrosion-resistant characteristics, aluminum is an essential material in industries such as automotive, electronics, and construction materials. However, in the process of aluminum fabrication, the punching process is key to improving the quality of the final product. And one component that is crucial in this process is Punching Oil.
Today, let’s explore why aluminum punching oil is so important and what factors need to be considered when selecting it.
Why is Punching Oil Important?
In the aluminum punching process, punching oil plays a vital role beyond just lubrication. This is because aluminum is more heat-sensitive and prone to deformation compared to other metals. In this context, punching oil performs several critical functions:
Lubrication: It reduces friction between the punch and die, increasing the machine’s lifespan and preventing unnecessary wear and tear.
Heat Dissipation: It helps to quickly disperse the heat generated during high-speed punching, preventing deformation.
Residue Removal: It effectively removes burrs, chips, and other residues after processing, resulting in a clean surface.
Surface Protection: It protects the aluminum surface and prevents scratches and stains.
As such, punching oil is an indispensable factor in ensuring the high-quality processing of aluminum products.
What Makes Aluminum-Specific Punching Oil Different from Regular Oil?
Aluminum, due to its nature, has higher friction during processing and is more sensitive to heat than other metals. Therefore, aluminum-specific punching oils differ from regular oils used for other metals in several key ways:
Viscosity: Aluminum-specific punching oils generally have low to medium viscosity, which allows the oil to penetrate quickly, dissipate heat efficiently, and minimize wear on machine components.
Chlorine Additives: Many aluminum-specific oils are chlorine-free because chlorine-based compounds can corrode the aluminum surface.
Cleanability: After aluminum processing, cleaning is essential. Aluminum-specific oils are often designed with fast-drying properties, making them more efficient in post-processing steps.
Low Odor & Low Smoke: The latest aluminum punching oils have low odor and low smoke performance, improving the working environment.
How to Choose the Right Punching Oil: Don’t Make These Mistakes!
When selecting punching oil, it’s essential to consider processing conditions and aluminum alloy type. To determine which oil is most suitable, check the following criteria:
1. Processing Conditions:
If you perform high-speed punching often, it’s crucial to choose an oil with excellent cooling properties.
For continuous processing, select an oil that is easy to clean and focuses on equipment protection.
2. Aluminum Alloy Type:
The oil’s reaction can vary depending on the type of aluminum alloy. Therefore, it’s vital to select oil that matches the alloy being processed.
3. Environmental Regulations:
Nowadays, environmentally friendly products are preferred. Oils that produce lower VOC (volatile organic compounds) emissions and are biodegradable are gaining popularity.
4. Cleanability:
After aluminum processing, residue removal is essential. Choose oils that are either easy to clean or have fast-drying properties to ensure they don’t interfere with subsequent processing steps.
Enhance Quality with Aluminum Punching Oil!
Aluminum punching oil is not just a lubricant. It is a critical component for producing high-quality aluminum products. Selecting the right punching oil can improve processing precision, machine efficiency, and workplace safety—all of which are keys to successful production.
To ensure your aluminum products are processed to the highest quality, choosing the right punching oil is absolutely crucial. By now, you should realize that punching oil is no longer just a supplementary material but an essential element for successful product manufacturing.
Punching oil is an industrial lubricant used for punching holes or forming shapes in metal. It is generally classified as a metal forming lubricant and is also known as punching oil.
Applications
Punching oil is widely used in the manufacturing processes of motor cores, heat exchangers for air conditioners and refrigerators, radiators for automobiles and heaters, and disposable aluminum lunch boxes. While it is increasingly used for processing aluminum alloys due to the recent increase in their application, punching oil suitable for the material can be applied to almost all metal types.
Key Features
Similar to press oils and other metal forming lubricants in terms of shaping, punching oil has distinct characteristics different from other processing oils:
1. Fast-Drying with No Residue
As mentioned earlier, punching oil is often referred to as “fast-drying oil” as well as “punching oil.” Its most significant feature is its rapid drying property. Most other metal forming lubricants require subsequent processes like cleaning or rust prevention after machining, but punching oil naturally dries within minutes without a separate drying system in some manufacturing plants aiming for faster production. This eliminates the need for additional cleaning processes and leaves no residue, which does not interfere with subsequent processes such as welding.
2. Low Viscosity for High-Speed Operation
Viscosity is a crucial factor in lubricant application, and punching oil is no exception. While high-viscosity lubricants are suitable for slow or high-temperature operations, punching oil is often used in high-speed operations exceeding hundreds of strokes per minute. High viscosity can strain equipment due to resistance and cause defects by adhering the product to the mold during operation. Furthermore, it can affect the drying speed, making low viscosity essential.
3. Excellent Extreme Pressure (EP) and Lubricity Properties
While extreme pressure and lubricity are important for all metalworking fluids, they are even more critical for punching oil due to the demanding nature of the applications it serves. Punching oil is specifically designed for high-speed punching of high-strength materials, and new, even stronger materials are continuously being developed. The high impact during high-speed punching can shorten the lifespan of molds, making punching oil with excellent EP and lubricity properties essential for preventing mold damage and extending their service life. It also minimizes defects in the punched and formed areas of the product and enables the production of high-surface-finish products, contributing to better overall product quality.
Other Features
In addition to the three main features mentioned above, other basic characteristics of punching oil include being colorless for ensuring visibility during operation, odorless to consider the comfort of workers, and non-toxic to prevent harm upon direct contact.
Future Outlook
With the advent of the AI era, the pace of technological development is accelerating at an unprecedented rate, and the development of metal materials is no different. The fields where punching oil is used often involve aluminum alloy materials for electric vehicles, which are at the forefront of recent technological advancements, making this trend even more pronounced. Leveraging the lightweight properties of aluminum, new, stronger, and lighter aluminum alloy materials are being developed rapidly, inevitably increasing the performance expectations for punching oil.
However, developing punching oil that meets these rising expectations is challenging. Achieving superior extreme pressure properties for high-speed processing of strong materials is crucial, while also addressing the difficulty of being harmless to humans and complying with increasingly stringent environmental regulations.
At DYNA, we continuously strive to develop high-performance punching oil technologies and have been recognized for our technical expertise, supplying our products to various domestic and international companies. If you are seeking better performance and quality than your current punching oil or require technical consultation, please do not hesitate to contact us.
Industrial lubricant market is already saturated with numerous manufacturers. However, punching oil, unlike general-purpose industrial lubricants, is mainly used by large-scale manufacturers and requires strict testing and qualification before being adopted into mass production processes. In particular, major corporations often demand formal approval processes and documentation, making entry into this market quite difficult.
Due to these challenges, it is difficult for small and medium-sized lubricant producers to supply punching oil to mid-sized or larger companies. Product development can be costly and time-consuming, and the risks involved often lead companies to abandon projects midway.
Our company has developed a punching oil specifically designed for use in the aluminum fin press process, a key component in air conditioner manufacturing. This product has been successfully adopted by a major corporation’s production line.
This article is about quality requirements of punching oil for aluminum fin press.
Quality Requirements
1. Lubricity
The aluminum fin press oil must use high-performance synthetic ester as the base oil and include dispersing agents to ensure a uniform lubrication film, providing stable and consistent lubrication performance.
2. Friction & Wear Resistance
The product must meet optimal conditions for friction and wear resistance by carefully selecting and balancing additives based on their properties to ensure excellent workability.
3. Hydrophilicity
Low-volatility base oils and additives should be used to minimize oil residue after processing, facilitating easier post-processing cleaning.
4. Human Safety
Base oils must be certified by the FDA for indirect food contact, and all additives must be non-toxic and safe for human use, including those used in cosmetics and food-related applications. The formula must exclude toxic, carcinogenic, or otherwise harmful substances to prevent skin or respiratory health issues commonly associated with general-purpose oils.
5. Environmental Safety
The oil must be free of sulfur and chlorine compounds (below 1 ppm) and must not emit harmful substances when burned, ensuring a minimal environmental impact.
6. Cost Efficiency
To reduce manufacturing and logistics costs, additives should be localized as much as possible to reduce dependency on imports. The formula should also be flexible enough to support future new product development.
Each of these quality criteria must be validated through detailed testing to ensure compliance.
Comprehensive performance data—such as hydrophilicity, compatibility, processability, and volatility—should be recorded and maintained to allow prompt troubleshooting and technical collaboration for future performance upgrades and product development.
When we think of metalworking industries, we often picture massive machines roaring as they cut, bend, and stamp red-hot metal. In all these intense processes, there’s a hidden but crucial player—punching oil (also known as stamping or press oil).
At Dyna, we pride ourselves on our unmatched expertise in the field of punching oil. Our products are trusted by major domestic corporations and are exported to many countries worldwide, gaining global recognition. Today, let’s take a closer look at how Dyna Solution’s punching oils contribute to the creation of a wide range of metal products—from pin press dies to motor cores, the heart of electric vehicles, and heat exchangers.
Punching Oil: The ‘Universal Lubricant’ of Metalworking
Punching oil plays a pivotal role in resolving various issues that arise during high-impact metal forming and in enhancing product quality. Much like using oil in a frying pan to prevent sticking, it reduces friction between the die and the metal sheet.
Reducing Friction & Heat Generation: It mitigates the intense friction and heat generated when the die and metal materials come into contact under high pressure. Since excessive heat can deform the die and degrade product quality, punching oil serves as a crucial protector.
Extending Die Life: Less friction means less wear and tear on the die. This significantly extends the lifespan of these expensive and precisely crafted tools, contributing greatly to cost reduction in manufacturing.
Improving Formability & Ensuring Product Quality: It helps metal materials transform smoothly into the desired shape without tearing or wrinkling. This leads to fewer defects and ensures products meet design specifications with clean and precise edges.
Thanks to these benefits, punching oil enhances productivity, reduces defect rates, cuts manufacturing costs, and improves energy efficiency across metalworking processes.
However, punching oil isn’t without its challenges. Costs are incurred, waste oil disposal raises environmental concerns, and oil mist can affect the working environment. Moreover, any residual oil on the product can interfere with subsequent processes or final product performance. Thus, post-application drying and treatment are essential.
1. Pin Press Dies: Stamping the Heart of Precision Parts
Pin press dies are used to produce very small and complex metal components (such as parts within electronic devices, automotive components, and heat exchanger fins). Here, punching oil acts as a key enabler of high precision and intricate shapes. It controls even the finest friction, ensuring that each tiny part is manufactured with perfect accuracy. In this type of precision processing, clean application and post-treatment of the punching oil are crucial.
2. Motor Core: The Hidden Tech in the Heart of Electric Vehicles
As the world shifts toward electric vehicles, motors are becoming increasingly vital. A core component of these motors, the motor core, is made by precisely punching and stacking thin silicon steel sheets. Punching oil is used in this process as well.
However, motor cores operate in environments where electricity flows and heat is generated. Residual punching oil can compromise electrical insulation, reducing motor performance and shortening its lifespan. To address this, manufacturers emphasize complete removal of the oil—this is where the drying process becomes critically important.
After punching, the motor cores pass through oven-like dryers via conveyor belts, where they are exposed to high heat. This step ensures that all punching oil either evaporates or dries completely, allowing the motor core to deliver optimal electrical performance in a clean state.
3. Food Containers: Also Used in Forming Thin Aluminum Foil Sheets
Various food container products, such as aluminum foil lunch boxes and silver foil packaging containers, are also made through the press process. The material commonly used for this is thin, wide aluminum foil sheets, and to prevent friction and cracking of the metal, lubricant (taba oil) is essential.
Products intended for food containers must meet strict hygiene and safety standards, so careful consideration is needed when selecting lubricants. In light of these special requirements, taba oils should not only ensure good forming performance but also facilitate easy cleaning after the process and minimize residue.
Invisible Lubrication Driving Industry Forward
Punching oil is more than a simple metalworking aid. It’s a core technology that affects the performance of precision components and the overall lifespan of products. As new challenges emerge—like workplace safety, environmental regulations, and efficiency in cleaning processes—punching oils are evolving too.
Lubrication technologies will continue to advance. Innovations that reduce environmental impact and improve operational efficiency are being actively developed. In this push toward sustainable manufacturing, the unseen yet vital role of punching oil is gaining even more importance.
At Dyna, we are at the forefront of this transformation, developing and supplying a wide range of punching oils to clients around the world.
Our product lineup reflects the diverse needs of industries such as motor core and heat exchanger manufacturing, contributing to improved productivity and product quality.
We will continue to adapt to changing manufacturing environments and customer demands, delivering safe and efficient metalworking solutions into the future.
In recent years, sales of electric vehicles (EVs) have been increasing rapidly and are expected to grow even more steeply in the coming years. As a result, global automakers are announcing the discontinuation of internal combustion engine (ICE) vehicle production.
This shift has prompted companies previously involved in ICE vehicle manufacturing to quickly pivot toward the EV market by investing heavily in production facilities and research and development. Among the core components of EVs, batteries and motors are expected to see especially rapid technological advancements.
At Dyna, we have been supplying punching oil to domestic and international manufacturers of battery components and motor cores for several years. We are committed to providing punching oil optimized for each production line, and we continue to receive increasing inquiries from companies in the industry.
The motor core is a key component that comprises the stator and rotor of a motor, playing a critical role in generating electricity. It is widely used not only in automobiles but also in home appliances, industrial machinery, and various power tools.
Motor cores are typically produced by processing and laminating thin sheets of electrical steel. This lamination reduces eddy current losses and prevents overheating caused by induced currents within the core.
When electric current flows through a coil, a magnetic field is created. Interrupting this current generates a counter-electromotive force (back EMF), due to the inertia of the electric current that attempts to continue flowing. This phenomenon causes molecular motion and eddy currents inside the core, leading to heat generation. To mitigate this, thinner and more precisely laminated cores are preferred.
As thinner and more durable steel materials have been developed, there is a growing demand for high-performance punching oil that can withstand the heavy loads of dies weighing several tons and high-speed punching operations exceeding 400 strokes per minute. For high-quality production, it is essential to use punching oil that can protect the die, remove metal particles, prevent discoloration of raw materials, and maintain the overall integrity of the manufacturing process.
We Dyna Co., Ltd. is continuously dedicated to developing high-performance punching oil technologies and has earned recognition for its expertise by supplying to a wide range of domestic and international companies.
If you are looking for punching oil with superior performance and quality compared to your current solution, or if you need technical consultation, please feel free to contact us anytime.
A radiator is a cooling device installed in front of a car engine. Its primary role is to dissipate the heat generated within the vehicle.
The engine, often referred to as the heart of the car, continuously receives fuel and generates intense heat during combustion. If this heat is left unmanaged, the engine can overheat, causing metal components like the cylinder and piston to melt or become damaged.
To prevent this, a water jacket is installed around the cylinder. Coolant circulates through this jacket to absorb and carry away the heat. However, if the coolant itself becomes too hot, it may begin to boil and lose its cooling capability.
This is where the radiator comes into play—hot coolant is routed to the radiator, where it is cooled before being recirculated.
Since radiators are usually positioned at the front of the vehicle, they are cooled by ambient air flowing in through the grille while driving. A cooling fan is typically located behind the radiator to prevent hot air from stagnating.
Radiators come in different structural types, such as tube-type and cell-type, and are equipped with a thermostat at the outlet of the water jacket to maintain coolant temperature between 75–80°C (167–176°F).
Radiators as Heat Exchangers
Essentially, a radiator functions as a heat exchanger that maintains a stable engine temperature by cooling down hot fluids. Radiators are used not only in cars, but also in aircraft, trains, power generation facilities, and any system that involves engines.
A radiator is mainly composed of:
Tanks
Cooling fins
Tubes
The top section includes the tank, radiator cap, overflow pipe, and inlet pipe.
The core section consists of tubes and densely packed cooling fins.
The bottom section houses the outlet pipe and a drain plug for discharging coolant.
While brass and copper were used in older radiator cores, modern radiators predominantly use aluminum alloys for improved performance.
The radiator cap, once a simple stopper to prevent coolant leakage, is now a pressurized, sealed cap. This pressurization raises the coolant’s boiling point and enhances cooling efficiency by increasing the temperature differential with the outside air.
Radiator Flow Types
Radiators are classified by the direction in which coolant flows:
Downflow Type
Tanks are placed on the top and bottom.
Uses gravity to direct coolant from top to bottom.
The most common type.
Crossflow & U-Turn Flow Types
Tanks are placed on the sides.
Coolant flows horizontally.
Offers a larger heat dissipation area for improved heat exchange, but creates higher flow resistance, requiring stronger water pumps.
Press Oil for Radiator Fins
As shown in the illustration, radiators are filled with densely packed aluminum fins. Press oil (punching oil) is used during the pressing process to form these aluminum fins into precise shapes.
In order to press thin aluminum sheets into the required form:
The pressing machine’s performance is critical,
But equally important is the quality of the press oil used.
If the press oil’s viscosity or flash point is unsuitable, it may lead to issues in the pressing process, resulting in:
Poor product shaping,
The need for additional cleaning steps,
Or even higher production costs due to cleaning difficulties.
Why Dyna?
At Dyna, we produce press oils that are:
Odorless, colorless, and safe, made from refined, high-performance base oils.
Optimized with additives specifically designed for radiator fin pressing.
Certified with FDA approval, ensuring safety for workers and compliance for global manufacturing standards.
Our radiator press oils have been supplied for over 25 years to major international radiator manufacturers.
The demand for motors is exploding due to the rise of electric vehicles. This trend is expected to continue long-term, and the stock prices of related companies are also steadily increasing.
Not only electric vehicles, but also many products around us use motors. Motors are essential components in almost all household appliances such as refrigerators, air conditioners, and vacuum cleaners, as well as in industrial power generators like hydroelectric and wind power systems.
Punching oil is used in the manufacturing of motor cores, which are key components of these motors. A motor core is a critical part that generates electricity in a motor. It is made by stacking several layers of products that have gone through a punching process.
The punching oil used in this process helps reduce friction during punching, provides excellent lubrication for more precise processing surfaces, and prevents various issues that could occur during stacking due to lubricant use.
Radiators
When we think of radiators, we usually imagine the cooling devices installed at the front of cars to cool the coolant. In vehicles, radiators serve as heat exchangers.
Through heat exchange (cooling hot components), radiators help maintain the engine temperature. They are used not only in cars but also in trains, airplanes, ships, and power generation facilities—essentially, anywhere an engine is used. Radiators are also found in household appliances like refrigerators and air conditioners, as well as refrigerated display units in grocery stores.
Radiators consist of numerous aluminum fins arranged horizontally or vertically at consistent intervals. Punching oil is used to punch these aluminum fins.
Although the punching oil used in radiators for air conditioners and refrigerators is of a quick-drying type, a separate drying process is still carried out.
Aluminum Disposable Containers
In the past, disposable containers such as lunch boxes in Korea were often made of aluminum. However, their usage has declined due to the rise of plastic containers.
Nonetheless, in other countries, aluminum is still considered less harmful than plastic. It is widely used for packaging baked goods and remains popular in party culture.
Since these disposable containers are often used for storing food, special care is required. The punching oil used in this application must consist of base oils and additives that are certified and approved by organizations such as the FDA.
Battery Case Components, Capacitor Cases, etc.
In addition to the three examples above, punching oil is also used in the production of electric vehicle battery cases and related components. Capacitor cases, which are parts of various electronic products, are also made of aluminum and are manufactured through punching processes that require punching oil.
Furthermore, punching oil is widely used across many other areas, including automotive parts, the internal mesh of microwave oven doors, electrical circuit breakers, and more.
DYNA Co., Ltd 