What Is a Refractometer? And Why You Should Be Using It?
What Is A Refractometer?
And Why Is It An Important Tool You Should Be Using On A Regular Basis
A refractometer measures the refractive index of a liquid, which is affected by the concentration of dissolved solids or additives. By placing a drop of the metalworking fluid on the refractometer’s prism and measuring the refraction of light passing through it, the refractometer provides a reading that correlates to the concentration of the coolant additives.
A refractometer is an important tool in metalworking fluids because it helps in determining the concentration or the ratio of coolant additives in the fluid. Metalworking fluids, such as cutting fluids, coolants, and lubricants, are used in various machining processes to improve tool life, reduce friction, and dissipate heat. These fluids often consist of a mixture of water and various additives, such as corrosion inhibitors, lubricants, and surfactants.
The concentration of these additives is crucial for achieving optimal performance, efficiency and reducing costs in metalworking operations. If the concentration is too high, it can lead to problems like reduced cooling capacity, increased fluid viscosity, and decreased tool life. If the concentration is too low, it may not provide sufficient lubrication or corrosion protection.
Metalworkers can use this information to monitor and adjust the concentration of additives in the metalworking fluid to ensure it remains within the recommended range. The Concentration % allows users to maintain the desired performance characteristics, such as cooling efficiency, lubrication, and corrosion protection. Additionally, using a refractometer helps prevent issues like tool wear, poor surface finish, and workpiece damage that can occur due to improper coolant concentration.
We regularly post about the importance of maintaining coolant concentrations. Approximately 95% of coolant problems are related to improper concentrations. Several points to consider on using yours:
- Keep the site glass clean
- Regularly calibrate the refractometer using the water you use for coolant mixing
- Remember—the BRIX Reading IS NOT THE CONCENTRATION %. Every coolant has an index #
Simply multiply the Brix reading x the coolant Index # to get the concentration. You can use our Brix Calculator on our web site; it’s very simple to use. Check it out here: BRIX Calculator – Monroe Fluid.
A refractometer is an essential tool in machining with water based metalworking fluids. Maintaining optimal fluid performance will help ensure the quality of machining processes.