CNC stroj u radu

5 tips for optimizing CNC milling: How to improve efficiency and precision

 

CNC milling is one of the most important operations in modern metalworking. Whether you are an experienced designer, a production engineer or just looking for reliable part manufacturing – these few practical tips can save you time, reduce costs and increase the quality of the final product

 

1. Choose the right tool

A correctly selected tool makes the difference between accurate machining and expensive waste.

Pay attention to:

  • the workpiece material (steel, aluminum, stainless steel, etc.),
  • the type of machining (rough, fine, final),
  • the finish and tolerances.

For example, tools with a higher rake angle and fewer teeth are often used for aluminum for better chip evacuation.

 

2. Optimize cutting parameters

The wrong choice of speed or feed rate is the most common cause of tool wear and poor machining.

Recommendation:

  • Use the recommended tables of the tool manufacturer.
  • Always adjust the speeds to the material and dimensions of the workpiece.

Tip: if in doubt, consult a CNC operator before manufacturing – you will save both time and material.

 

3. Use coolants correctly

Coolant is not just “cooling water”.

Proper application:

  • reduces tool wear,
  • improves surface quality,
  • prevents overheating of the material.

Choose between spray, drip, dry milling (e.g. for graphite) – depending on the type of processing and the material.

Rashlađivač strojeva

4. Maintain your CNC machine regularly

Even the most precise machine loses accuracy if its guides are not clean, or the shafts are dry.

Preventive maintenance includes:

  • daily checking the machine’s travel and noise,
  • weekly cleaning of filters and cooling systems,
  • monthly checking of tools and clamping systems.

Downtime costs more than the time spent on regular maintenance.

 

5. Don’t skip quality control

Without control, there is no repeatability. Whether it’s a simple bearing or a complex 5-axis part, measurement is the final step that confirms all the previous ones.

Use:

  • digital calipers,
  • micrometers,
  • 3D measuring machines (if available).
Alati za mjerenje

CNC machining is not just “processing according to the drawing”, it is a process where collaboration and knowledge make the difference. Next time you send an inquiry for machining, remember these steps, you’ll get a faster response, more accurate production, and a lower price.

 

Do you have a drawing, idea, or doubt?

Send us a technical drawing, model, or just an inquiry, and we’ll be happy to help you from the start.

Send an inquiry via the contact form.
Or contact us directly at info@dnk-projekt.hr