TOOLTALK What to Know About Refractometers It is important to keep your concentration balanced. Below are several issues caused by a high or low concentration. High Concentration Increased Tool Performance Improved Biological and Corrosion Control Increased Coolant Usage Dermatitis and Paint Peeling Foaming Low Concentration Lower Tool Performance Bacterial and Fungal Growth Rust and Corrosion How often should fluid maintenance be performed? Follow the chart below to keep your fluid in ideal condition. Measuring the concentration using a refractometer should be a weekly to daily activity. Sump Class Miniature Small Small-Medium Medium Large Sump Size 0-4 gallons 5-20 gallons 26-99 gallons 100-1000 gallons 1000+ gallons Evaluation Method Visual Inspection Smell for Odor Visual Inspection Smell for Odor Concentration (Sump Level) Visual Inspection Smell for Odor Concentration (Sump Level) pH Level Visual Inspection Smell for Odor Concentration (Sump Level) pH Level Microbiological (Dip Slide) Visual Inspection Smell for Odor Concentration (Sump Level) Concentration (Acid Split) pH Level Microbiological (Dip Slide) Interval Daily Daily Daily Daily Twice Weekly Daily Daily Twice Weekly Bi-Weekly Daily Daily Twice Weekly Weekly Bi-Weekly Daily Daily Daily Bi-Weekly Weekly Weekly Looking for Metalworking Tools? Contact Fastenal at 844.365.8665 or cuttingtoolsupport@fastenal.com Go to fastenal.com/metalworking for previous Tool Talks WF_153519 JP 6/20
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