• ascnc@asianstarcnc.com

Climb Milling vs Conventional Milling CNC: Choosing the Right Approach for Your Project

When it comes to CNC milling, there are two primary approaches that machinists use: climb milling and conventional milling. Both methods have their own advantages and disadvantages, and choosing the right approach can significantly impact the outcome of your project. In this blog post, we will explore the differences between climb milling and conventional milling and provide insights on when to use each method.

Understanding Climb Milling

Climb milling, also known as down milling, is a cutting technique where the cutter rotates against the direction of the feed. This means that the material is being cut by the edge of the cutter that is moving into the workpiece. In climb milling, the chip thickness decreases as the cutter moves through the material, resulting in a smoother surface finish.

One of the key advantages of climb milling is that it reduces the tool deflection and improves tool life. Since the cutting forces are directed towards the machine and not against it, there is less chance of the tool chattering or breaking. Moreover, climb milling produces less heat, reducing the risk of thermal distortion.

Exploring Conventional Milling

Conventional milling, also known as up milling, is the opposite of climb milling. In this cutting technique, the cutter rotates with the direction of the feed, cutting against the material. Conventional milling is often preferred for roughing operations due to its ability to handle heavier material removal rates.

One of the advantages of conventional milling is that it offers more stability during the cutting process. As the cutter pushes against the material, there is less chance of the workpiece lifting or shifting. However, conventional milling does produce slightly rougher surface finishes compared to climb milling.

Choosing the Right Approach

Deciding whether to use climb milling or conventional milling depends on various factors such as the material being machined, the geometry of the part, and the desired surface finish. Here are a few guidelines to help you make the right choice:

  • Material: For softer materials like aluminum, climb milling is often the preferred approach. It reduces the risk of chip recutting and produces better surface finishes.
  • Tooling: If you are using tools with a higher number of flutes, climb milling can provide better performance due to reduced tool deflection.
  • Surface Finish: If achieving a smoother surface finish is crucial, climb milling is typically the better option. However, for roughing operations, conventional milling may be more efficient.
  • Workpiece Stability: If your workpiece is prone to lifting or shifting during the cutting process, conventional milling can provide better stability.

It's worth noting that some modern CNC machines have implemented strategies to combine the benefits of both climb milling and conventional milling. These machines can automatically adjust the cutting approach based on the specific requirements of the operation.


Choosing between climb milling and conventional milling is a crucial decision that can impact the quality and efficiency of your CNC milling projects. By understanding the differences, advantages, and considerations of each approach, you can make an informed choice that aligns with your project requirements. Remember to consider the material, tooling, desired surface finish, and workpiece stability when making your decision. Whether you choose climb milling or conventional milling, always prioritize safety and consult with experienced machinists or manufacturers for complex projects.

climb milling vs conventional milling cnc

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.


CNC Turning Service

CNC Turning Service

Our CNC Turning Service provides different sizes of roll shape work-pieces, the diameter range is from 0.5mm to 480mm, reaching tolerance +/-0.003mm.

CNC Milling Service

CNC Milling Service

Our milling machines and CNC centers are able to produce complicated structure part, five-axis devices produce multi-sides at one-time jag which bring high precision result

Sheet Metal Fabrication

Sheet Metal Fabrication

Our Sheet Metal Fabrication provides slicing, punching, bending, welding, painting and assembling for set products, unique tooling for each project to raise production efficiency

Aluminum Extrusion

Aluminum Extrusion

Our Aluminum Extrusion brings clients various shapes of aluminum parts, high efficiency for mass quantity, our precision extrusion mold control tolerance within 0.01mm

Forging Service

Forging Service

For some steel serious products, we apply Forging Service to make out their outer shape and them use CNC devices to start drilling, forming, rolling, cutting, etc.

Finishing Service

Finishing Service

Our Surface Finishing Service uses chemical or electro post-treatments after machining tasks are finished, normally includes Oxide, Anodizing, Passivation, E-Plating, Painting,etc.


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.


Experienced Skills

Asianstar have long term experience in CNC machining service and built up skillful team servicing clients from designing to product

High Quality

Asianstar QC system controls the production following internal quality protocol, which make sure every procedure are working under quality demands

High Efficiency

Asianstar abundant facilities allows multiple machining process, we can support clients in rapid sampling/prototyping and quick order lead-time

Competitive Price

Asianstar has enough in-house facilities for all machining processes, so we can choose the best machining solutions to make the production cost lowest


  • 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