Beat the Heat: Cold Gun Air Coolant Systems Extend Tool Life with No Messy Coolant

In most drilling, machining, and cutting operations a flood of coolant is used to remove heat from the work piece and the tool. This coolant is sprayed, and after it impacts the tool or part it sprays everywhere. In some case there is no way around using coolant due to required cutting speed, specific heat of the part, or the need for lubrication. In other applications coolant is prohibited from touching the work piece due to application requirement. This means that the tool and the work piece operate at a higher temperature and could damage the tool or work piece.

Cold Gun
Cold Gun, Model Number 5315, In Use

EXAIR Cold Gun Air Coolant System drop the temperature of compressed air by 50 degrees Fahrenheit. This air is then blown on a tool and work piece to take way most of the heat generated during machining. Used in combination with a tool that can handle a higher temperature like a high performance carbide the Cold Gun can deliver reliable machining without the mess of coolant.

Normally in dry machining you also loss coolant’s ability to clear chips from the work area. These chips can trap heat and further increase the temperature of the work area. The chips will also work harden with repeated cutting causing more wear on the tool and a bad surface finish on the part. With a flood of coolant the chips are washed away, but with dry machining air must be used to clear the work area. EXAIR 5315 Standard Cold Gun features (2) 1″ wide nozzle that can be used to cool and the produce enough air flow to prevent chip build up. If you are looking for more information on dry machining, Brian Boswell wrote a thesis on the topic.

Dry machining doesn’t just replicate the machining with a flood coolant it can improve the process. Extended exposure to airborne lubrication mists present potential health risks to machinists. Coolant is becoming more expensive to dispose of after it has been used this is only going to increase over time as environmental regulation become greater. Removing the coolant from your process can ease your environmental impact while still maintaining the quality machining your customers require.

Dave Woerner
Application Engineer

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