How to clean a dirty CNC machine

With Ashburn Machine Cleaner Plus.



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How to clean a dirty CNC machine with a machine cleaner & degreaser

August 2021


Let’s face it – cleaning your CNC machine may be at the bottom of your priority list. Shutting your machine down and spending time, money, and labor may not seem worth it. However, this often overlooked task can make a huge impact to your machine’s reliability, working life, performance, operator satisfaction and your overall bottom line.

Using a machine cleaner to flush out your system periodically is a preventative maintenance practice that can extend the life of your machine, reduce downtime, reduce cleanouts, and improve the life and performance of your coolant.


  • Ashburn Machine Cleaner Plus
  • Cloths/rags
  • Spray bottle
  • Water


  1. Remove all heavy chips, sludge and residue from the machine. 
  2. Pre-mix your machine cleaner/degreaser at a 40:1 ratio with water. Add enough of this mixture to the machine to allow circulation. Circulate this mixture for at least 20 minutes. 
  3. After the cleaning mixture has circulated for 20 minutes, add 2% of coolant concentrate and circulate this combined mixture for 15 more minutes.
  4. Use a spray bottle to apply a 15:1 mixture (water to concentrate) to clean the inside of the machine. Wipe down surfaces and rinse thoroughly. 
  5. After circulating, drain the sump and wipe thoroughly with an absorbent cloth. 
  6. In order to ensure cleanliness, rinse the machine again at a 60:1 mixture for 10 minutes. 
  7. Pre-mix the desired coolant separately to specified dilution and recharge the machine. 


    For best results, use Ashburn Machine Cleaner Plus. Machine Cleaner Plus is a specially formulated water-soluble cleaner specifically designed for machine tool sump cleaning. This product will cut oil and sludge and remove bacteria and fungus found in the machine sump and coolant lines. Ashburn Machine Cleaner Plus will make the tough job of cleaning a machine tool easier and also prepare a machine to allow the coolant to perform with maximum effectiveness.


    If you want a more thoroughly machine cleaning or restoration, consider Ashburn’s machine cleaning services.  Ashburn offers three levels of expert machine cleaning and coolant recycling services. 

    Ashburn machine cleaner plus

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