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CNC Milling Speeds and Feeds Chart

Milling is a fundamental machining process used in various industries to remove material from a workpiece, shaping it into the desired form. When it comes to achieving optimal milling results, understanding the correct speeds and feeds for your CNC milling machine is crucial. In this article, we will delve into the importance of speeds and feeds, explore the factors influencing them, and provide a comprehensive speeds and feeds chart to help you achieve optimal machining performance.

What are Speeds and Feeds?

Speeds and feeds refer to the parameters that dictate how fast the cutting tool moves along the workpiece (speed) and how much material is removed per revolution (feed). These parameters greatly impact the efficiency, precision, and tool life during the milling process. By optimizing speeds and feeds, you can achieve faster machining times, improved surface finish, and prolonged tool life.

Factors Affecting Speeds and Feeds

Several factors influence the selection of speeds and feeds for CNC milling:

  • Material: The type of material being machined plays a significant role in determining the appropriate speeds and feeds. Harder materials require lower speeds and feeds to avoid excessive tool wear and overheating.
  • Cutting Tool: Different cutting tools have varying capabilities and limitations. Factors like cutter diameter, number of flutes, and coating affect the recommended speeds and feeds.
  • Workpiece Setup: The stability and rigidity of the workpiece setup impact the permissible speeds and feeds. A sturdy setup allows for higher cutting speeds and feeds without jeopardizing the machining quality.
  • Machining Operation: The specific machining operation being performed, such as roughing or finishing, affects the selection of speeds and feeds. Finishing operations typically require lower speeds and feeds for higher precision.

CNC Milling Speeds and Feeds Chart

To assist in determining the correct speeds and feeds for your CNC milling operations, refer to the following chart as a starting point:

Material Cutting Tool Tool Diameter (inches) Number of Flutes Speed (RPM) Feed Rate (inches/min)
Aluminum Carbide 0.25 2 10,000 20
Steel High-Speed Steel 0.5 4 1,500 6
Plastic Polycrystalline Diamond (PCD) 0.375 3 8,000 12

Keep in mind that the values provided in the chart serve as initial recommendations. Adjustments might be necessary based on your specific milling machine, tooling, and desired results. It is always recommended to consult the manufacturer's guidelines and perform test cuts to fine-tune your speeds and feeds.

Tips for Optimizing Speeds and Feeds

  1. Start with the recommended speeds and feeds from the chart and adjust as needed.
  2. Monitor the cutting tool and workpiece temperature to prevent overheating.
  3. Always use proper cutting fluids or lubricants to cool and lubricate the cutting process.
  4. Regularly inspect and maintain your milling machine and cutting tools for optimal performance.
  5. Consider utilizing advanced CNC software that can calculate optimized speeds and feeds based on your specific parameters.

By understanding the importance of speeds and feeds and utilizing the information provided in the chart, you can maximize productivity, prolong tool life, and achieve superior milling results. Experiment with different settings and have the confidence to optimize your CNC milling processes for efficiency and precision.

cnc milling speeds and feeds chart

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


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

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