FAQ: What Tips Do You Have For Cutting MDF?

MDF (Medium Density Fibreboard) is one of the most widely used materials in signage, joinery, exhibition build and furniture manufacturing. It’s affordable, easy to source and reliably consistent. However, cutting it cleanly and efficiently on a CNC router takes more than just a sharp tool. It requires a smart approach, the right tooling and a well-optimised machine setup.

At Complete CNC Solutions, we support businesses working with MDF daily using Tekcel CNC routers. Whether you're new to CNC machining or looking to improve your existing process, here’s what you need to know to get the best results from MDF.

Choose the Right Cutter for the Job

Tool selection is the foundation of a successful MDF workflow. The density and fibre structure of MDF can be abrasive and produce very fine dust, so your cutter must be durable and suited to the application.

For most MDF cutting jobs, we recommend our CC800 Compression Cutters. These are designed to offer an Up/Down cut in the same tool giving excellent, efficient chip clearance and a consistently smooth edge finish on both top & bottom surfaces of the material. For tighter internal radii or complex paths, a smaller diameter version may be more suitable and are available in 6mm, 8mm, 10mm & 12mm diameters. If you're looking for long-lasting performance and reduced wear, consider coated options to help protect against abrasion.

Set Feed Rates and Spindle Speeds to Match the Material

MDF is a great material and has many uses, but incorrect settings can quickly lead to burning, chipping or excessive tool wear. Your spindle speed and feed rate need to work in balance.

We always recommend spindle speed of 18,000 RPM for all MDF and wood products with our CC800 Compression cutter range. Our team can help you find the right settings for your setup if you’re unsure.

Use Multiple Passes for Thicker Sheets

Cutting through 18mm MDF in a single pass might seem like a time-saver, but it often reduces edge quality and puts extra strain on your tooling, along with leaving unwanted swarf in the cut trough. Instead, use multiple shallower passes. This gives better swarf extraction, reduces heat build-up and extends cutter life.

For a standard 18mm board, two or three passes at a sensible depth per pass is ideal.

PLEASE NOTE: Never vertically plunge with CC800 Compression cutters as they are designed to be “Ramped” into the material. If plunged vertically they can create too much heat and therefore scorch & burn the material.

Hold-Down Matters More Than You Think

The fine dust created when cutting MDF can settle between the sheet and the bed, acting like a cushion that weakens the vacuum seal. This can lead to poor hold-down, inconsistent cutting depth and even sheet movement during machining.

To avoid this, make sure your spoilboard is surfaced flat and vacuum zones are properly sealed. For some jobs, mechanical clamping may also be beneficial. Reliable hold-down is essential for clean, consistent results, especially when working with nested shapes or detailed cuts.

Invest in Dust Extraction for Clean Cuts and a Clean Workshop

MDF produces a high volume of fine, airborne dust. Not only can this affect machine performance, but it can also impact operator health and overall workshop cleanliness.

A robust extraction system is essential for maintaining cut quality and a safe, dust-free workspace. Tekcel routers are compatible with the HDV Heavy Duty Extraction System, which is designed to handle everything from dense chip loads to fine dust with ease. It reduces the need for manual clean-up, keeps machines running efficiently and ensures your working environment stays cleaner and safer, even during long production runs.

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Look After Your Tooling to Maintain Quality

Cutting MDF wears tooling faster than softer materials. Even high-quality cutters will dull over time. Watch for signs of dulling, such as rougher edges or a drop in cut quality. A worn tool can cause burning, fuzzy edges and increased cycle times.

Regular inspection and rotation of tools is good practice. If you notice increased resistance or smoke during cuts, it’s time to replace or regrind.

Final Thoughts

Cutting MDF efficiently is about more than setting up a toolpath and pressing start. From tooling selection to machine setup, every part of the process contributes to the final result.

With a Tekcel CNC router and the right accessories from Complete CNC Solutions, you can achieve clean, accurate MDF cuts with less wear, less dust and more consistency. Whether you’re starting out or refining a high-output workflow, our team can help you optimise your setup and get the most from every sheet.

Get in touch to discuss your MDF applications, tooling options or machine upgrades. We’re here to help you get it right.

FAQ: What Tips Do You Have For Cutting MDF?

Choose the Right Cutter for the Job

Set Feed Rates and Spindle Speeds to Match the Material

Use Multiple Passes for Thicker Sheets

Hold-Down Matters More Than You Think

Invest in Dust Extraction for Clean Cuts and a Clean Workshop

Look After Your Tooling to Maintain Quality

Final Thoughts

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