• ascnc@asianstarcnc.com

The Ultimate Guide to Coolant for Machining Copper

Copper is a highly conductive, malleable, and ductile metal that is widely used in various industries, including electrical, plumbing, and automotive. Machining copper can be challenging due to its high thermal conductivity and ductility, which can lead to built-up edges, tool wear, and workpiece distortion. To overcome these challenges, selecting the right coolant is crucial. In this blog post, we will explore the various types of coolants suitable for machining copper and how they can improve your machining process.

Water-Soluble Coolants

Water-soluble coolants are a popular choice for machining copper due to their excellent cooling properties, which help to minimize heat generation and reduce tool wear. These coolants are typically oil-in-water emulsions that contain additives such as corrosion inhibitors, lubricants, and biocides. Some benefits of using water-soluble coolants for machining copper include:

Improved surface finish

Reduced tool wear

Enhanced tool life

Lower operating temperatures

Synthetic Coolants

Synthetic coolants are formulated without any petroleum oil and are made from a blend of organic and inorganic compounds. They offer excellent heat dissipation, making them ideal for high-speed machining of copper. Some advantages of using synthetic coolants for copper machining include:

Excellent cooling properties

Low foaming

Good rust protection

Extended sump life

Semi-Synthetic Coolants

Semi-synthetic coolants are a hybrid between water-soluble and synthetic coolants, offering the best of both worlds. They contain a blend of mineral oil and synthetic additives, providing excellent lubrication and cooling properties. Some benefits of using semi-synthetic coolants for machining copper include:

Good balance of lubrication and cooling

Reduced tool wear

Improved surface finish

Longer sump life

Straight Oils

Straight oils, also known as neat oils, are non-emulsifiable and contain no water. They are made from a base oil with added extreme pressure additives, anti-wear agents, and corrosion inhibitors. While straight oils may not provide the same level of cooling as water-soluble or synthetic coolants, they offer excellent lubrication for cutting copper. Some advantages of using straight oils for copper machining include:

Superior lubrication

Reduced tool wear

Improved surface finish

Suitable for heavy-duty operations

Choosing the Right Coolant for Your Copper Machining Application

Selecting the right coolant for your copper machining application depends on various factors, such as the type of machining operation, cutting speed, tool material, and workpiece geometry. To choose the best coolant for your specific application, consider the following factors:

1. Cooling properties: Ensure the coolant has excellent cooling properties to minimize heat generation during machining.

2. Lubrication: Choose a coolant with good lubrication properties to reduce tool wear and improve surface finish.

3. Compatibility: Ensure the coolant is compatible with your machine, tooling, and workpiece material.

4. Environmental and safety factors: Consider using coolants with low toxicity and good biodegradability to minimize environmental impact and ensure operator safety.

In conclusion, the right coolant can significantly improve the machining process of copper, resulting in better surface finishes, reduced tool wear, and increased productivity. By considering the factors mentioned above and consulting with coolant suppliers, you can select the most suitable coolant for your copper machining application and achieve optimal results.

CNC Copper Machining

CNC Machining Copper Material is good electrical conductivity, thermal conductivity, it is soft and good for machining as it has high plasticity, it is easily and rapidly to carry out desired shape as machining cutter can run faster than other steel materials, and also reach high precision.

Copper has a shiny reddish-orange finish, which varies slightly based on the surface finish method. Copper can be media-blasted and polished to achieve many different cosmetic surface finishes.

CNC Machining Copper Parts are widely used in the manufacture of electrical wires, cables, electric brushes, electric spark, and other electrical devices and products.

CNC Copper Machining

Benefits of CNC Copper Machining

1/ CNC Machining Copper Parts are excellent in electricity conductivity, supporting very good electric function

2/ CNC Machining Copper Parts are soft, easy to design into different shape, also suitable for many processes

3/ Copper is easy for cutting and machining, its production efficiency is much higher than steel series

4/ Good propriety for bending and shaping

5/ Heat transferring function very good, high resistance, temperature stability, long durable using

6/ Stable surface, non-surface treatment is durable, electroplating is also used on copper parts

CNC Copper Machining

Composition And Property of CNC Machining Copper

Copper Property Alloy Type Content Melting Point Hardness Tensile Strength Density
Cu-based Zn, Sn, Si, Al, Ni 1083°C HB35-45 Low 8.9 g/cm3

Common Materials Code of CNC Machining Copper

Copper Alloy Workable Processes Surface Finishing for Copper Parts Materials Code
CNC Turning, CNC Milling, CNC Drilling, Molding, Forging, Fabrication, Welding, etc. Passivation, Anodizing, Plating, Chemical Polishing, etc. Copper 110
Copper 101
Copper 145
other more Copper Alloy

Asianstar: Professional CNC Machining Supplier

From year of 2005, Asianstar Company establish the CNC Machining Factory in Guangdong Province, China.
We mostly provide CNC Turning, Milling, Drilling, Grinding, and Multi Machining processes service on various materials.
With the Belief of becoming a key supplier in the supply-chain of Precision Components, we strictly control our product quality, keep high precision on our components production, buildup the whole-process QC System and submit the satisfaction for every order.
By long term development, we have buildup partnership with world-wide clients, supporting our partners in Designing, Optimizing, Producing and Testing on each type of components.


Advantages of Asianstar CNC Copper Machining

Strong Facilities

Asianstar many CNC and stamp machines allow us to produce various copper parts, different sizes, and structures are all well done by suitable solution

Long-term Skills

Asianstar professional engineers team has experience from year 2005, producing copper parts for world wide electric products

Stable Quality

Asianstar QC system and QC tools guarantee our products are perfect result. We have procedures to control copper parts quality during production

Competitive Price

Asianstar aim to buildup partnership with clients, always choose best suitable facilities to carry out the components in competitive prices


CNC Brass Machining


CNC Machining Brass material is used for wide range components, we support clients to produce a variety of parts such as gears, locks, electronics, pipe fittings, etc.

CNC Copper Machining


CNC Machining Copper material is soft and easy to machining on different shape of components. We mostly produce copper components for electric devices by machining and stamping

CNC Aluminum Machining


CNC Machining Aluminum materials is one of our most used materials. We support clients to turning, drilling or milling on aluminum material from size 0.5mm to 470mm

CNC Stainless Steel Machining

Stainless Steel

CNC Machining Stainless Steel are common material for wide range components, we produce Stainless Steel turning parts, milling parts, high smoothness components, etc.

CNC Titanium Machining


CNC Machining Titanium material brings components superb features, we use titanium to produce high precision work-piece for clients from aircraft, aerospace, medical devices

CNC Plastic Machining


Our CNC Machining Plastic materials includes ABS, HDPE, LDPE, Nylon, POM, Peek, Polycarbonate, etc. We produce them in high precision and high smoothness.


  • Q1.Do you support ODM/OEM?

    Yes, we support ODM/OEM, we provide custom-made service for clients or even support clients on designing or improving

  • Q2.Do You Have Stock
  • Q3.What Is Your Production Capacity?
  • Q4.Where Is Your Factory?
  • Q5.Can You Provide Samples?
  • Q6.How About Your After-sales Service?
Get The Best Quotes Now