Pure-Cut® Delivers 6.1x Machining Efficiency Improvement for 4140 Cold Rolled Steel

In CNC machining, tool speed and reliability define productivity. But when machining hard metals like 4140 cold rolled steel, even the best setups face heat buildup, tool wear, and long cycle times. Fusion Coolant’s Pure-Cut® supercritical CO₂ system is engineered to change that.

In this recent trial, we put Pure-Cut® to the test—and the results were transformative. Watch the full test here:

The Challenge: Machining 4140 Cold Rolled Steel at Speed

4140 cold rolled steel is known for its strength and stability—but those same qualities make it notoriously difficult to machine. Traditionally, you’d need to slow down speeds, manage excessive coolant mess, and accept shorter tool life.

For this test, we used:

• Material: 4140 Cold Rolled Steel
• Tool: CNMG120412-RP5 WPP10G insert
• Machine: Quick Turn 250 Mazak Lathe
• Cut Parameters:
  
  • Manufacturer recommended: 646 SFM, 0.011 REV
    Test parameters: 2200 SFM, 0.020 REV

The Pure-Cut® Difference: 6.1× Performance Boost

Using Pure-Cut®, we ramped up cutting speeds and chip loads dramatically—without overheating or damaging the tool.

Key Gains:

• SFM Improvement: From 646 → 2200 (3.4× increase)
  Feed Rate Increase: From 0.011 → 0.020 REV (1.8× increase)
  Overall Efficiency Improvement: 6.1×
  No Finish Pass Required: The test was purely a roughing operation—but still produced exceptional results.

By maintaining cooler tool temperatures and optimizing chip evacuation with scCO₂, we prevented thermal damage and maximized cutting efficiency in a single pass.

Why It Matters for CNC Operations

This trial shows how Pure-Cut® opens new performance ceilings for modern machining environments:

• Higher Speed Machining without loss of precision
• Cleaner Cuts with no coolant residue or mist
• Longer Tool Life under aggressive cutting conditions
• Eliminated Coolant Waste—Pure-Cut® evaporates cleanly
• No Secondary Cleaning Needed—parts come off dry and clean

These results demonstrate why Fusion’s Pure-Cut® is more than a coolant—it’s a productivity system that helps manufacturers reduce downtime, extend tool life, and scale faster with cleaner, safer technology.

Ready To Push The Boundaries Of Machining In Your Shop?

 Contact Fusion Coolant to explore a Pure-Cut® system customized for your needs.