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FAQ - oil mist extraction systems

Cleaner air for CNC workshops and manufacturing facilities

Oil mist, coolant aerosol, smoke and airborne contaminants are common by-products of modern machining processes. During CNC turning, milling, grinding and high-speed metal cutting, fine droplets of coolant and lubricants can become suspended in the air, creating visibility issues, slippery surfaces, contamination risks, unpleasant odours, and potential respiratory concerns.

Installing the right oil mist extraction system helps remove contaminants at source, protect employees, improve housekeeping standards, and support machine performance. Jemtech supplies advanced mist extraction systems UK businesses rely on, including compact machine-mounted units, coalescing filtration systems, and centralised air filtration solutions for industrial workshops. Jemtech’s extraction range includes centrifugal, coalescent and modular systems designed for demanding production environments.

1. What is oil mist extraction?

Oil mist extraction removes airborne coolant droplets, lubricating oil particles, smoke and aerosols created during machining processes. The system captures contaminants before they spread into the workplace.

2. What causes oil mist in CNC machining?

Oil mist is commonly created when cutting fluid or neat oil contacts rotating tools, hot components, or high-pressure coolant streams during machining.

3. Why is oil mist a problem in workshops?

Without effective CNC mist extraction, oil mist can:
• Reduce air quality
• Create slippery floors and surfaces
• Coat machinery and electrics
• Increase cleaning costs
• Affect worker comfort
• Cause unpleasant smells
• Reduce visibility near machines

4. Is coolant mist harmful to breathe?

Prolonged exposure to airborne coolant mist may irritate the respiratory system, eyes or skin depending on fluid type, concentration, ventilation and exposure levels.

5. Which industries need oil mist extraction systems?

Typical sectors include:
• Precision engineering
• CNC subcontract machining
• Aerospace manufacturing
• Automotive production
• Medical machining
• Defence engineering
• Toolmaking
• General metalworking

6. What machines commonly need mist extraction?

Common applications include:
• CNC lathes
• Machining centres
• Sliding head lathes
• Grinding machines
• Transfer lines
• Honing machines
• Washing systems

7. What is a CNC mist collector?

A CNC mist collector is an extraction unit fitted to, or connected with, a machine tool to remove airborne coolant mist generated inside the machine enclosure.

8. How does oil mist extraction work?

Systems typically draw contaminated air through filtration stages that separate droplets and particles before returning clean air or exhausting filtered air safely.

9. What types of oil mist extractor are available?

Common solutions include:
• Centrifugal mist collectors
• Coalescing filters
• Electrostatic systems
• Modular centralised extraction systems
• Machine-mounted compact units

Jemtech supplies multiple mist extraction technologies for different workshop requirements.

10. What is the difference between centrifugal and coalescing filters?

Centrifugal systems spin air to separate droplets.
Coalescing filters combine fine mist particles into larger droplets for drainage and collection.

Both can be effective depending on mist type and airflow demand.

11. Can collected coolant be recovered?

Yes. Some systems are designed to separate mist and return captured fluid back to the machine or collection system, reducing waste.

12. Do I need extraction on enclosed CNC machines?

Yes. Even enclosed machines can release mist when doors open, through gaps, or during loading and unloading cycles.

13. What size oil mist extraction system do I need?

Correct sizing depends on:
• Machine enclosure volume
• Coolant pressure
• Number of machines
• Duty cycle
• Airflow requirements
• Type of oil or coolant used

14. Can one system serve multiple machines?

Yes. Centralised workshop air filtration systems can connect multiple machines where layout and airflow demand allow.

15. How often should mist extractor filters be serviced?

This depends on:
• Hours of operation
• Fluid type
• Mist loading
• Machine process
• Filter technology

Regular servicing helps maintain airflow and performance.

16. Can mist extraction improve machine reliability?

Cleaner air can reduce contamination on sensors, electrical cabinets, machine surrounds and nearby equipment.

17. Will oil mist extraction reduce cleaning time?

Yes. Capturing airborne coolant before it settles can significantly reduce cleaning of floors, walls, lights and machines.

18. Does mist extraction help with compliance?

Yes. Properly designed LEV mist extraction systems can support workplace air quality and health & safety responsibilities when maintained and tested.

19. What are signs my current mist collector is underperforming?

Look for:
• Visible haze around machines
• Oily residue on surfaces
• Strong coolant smells
• Poor airflow
• Frequent filter issues
• Excess condensation
• Operator complaints

20. Does Jemtech install and maintain mist extraction systems?

Yes. Jemtech provides installation, servicing and support designed to reduce downtime and keep systems operating efficiently.

21. What mist extraction products does Jemtech offer?

Jemtech promotes several specialist ranges including:
CleanMist centrifugal systems
Mist Compact modular extraction units
MCOS Coalescent filtration systems

These are designed for industrial machining environments.

22. Can mist extraction improve employee comfort?

Yes. Many workshops report fresher air, less odour, and a cleaner environment when effective extraction is installed.

23. Is workshop-wide air filtration better than machine-mounted units?

It depends. Machine-mounted systems capture contaminants close to source, while central systems may suit multiple machines or larger facilities.

24. Why choose Jemtech for oil mist extraction?

Jemtech combines fluid management expertise with specialist extraction knowledge, helping UK manufacturers improve productivity, cleanliness and workplace safety.

25. How do I get started?

The best first step is a workshop survey to review machines, airflow, mist generation and current issues before recommending the right solution.

Why choose Jemtech?

Jemtech supports UK engineering businesses with:

Let Jemtech help you achieve HSE compliance

Don’t let HSE inspections catch you out. Contact Jemtech today to ensure your LEV systems meet all relevant legislations and keep your workers safe. We offer the products, services, and expertise to make compliance simple.

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