ASTRO-CUT SYN D is a heavy-duty oil-free synthetic cutting and grinding fluid concentrate designed to offer outstanding machining performance as well as excellent corrosion control on machinery and workpieces while providing a long sump life. This product may be used on a variety of metals, including steels, cast iron and aluminum; in operations ranging from grinding to turning to milling.

Product Data Sheet


ASTRO-CUT SYN D has been designed for machining most metals except magnesium. Excellent on cast iron. This product may also be used for grinding: blanchard, diamond wheel, belt, disk, etc. NOTE: Since this product is completely oil-free, it may be used in most coolant mist units for machining and grinding operations.

Features & Benefits

  • Excellent Corrosion Inhibition
  • Chlorine-Free
  • Very Low Foam – Excellent on High Pressure or High Speed Machining
  • Excellent Cooling for Ability to Maintain Close Tolerances
  • Tolerant of Hard Water
  • Resistant to Damage from Tramp Oil
  • Water Extendable- Economical
  • Long Tank Life
  • Phenol-Free
  • Nitrite-Free

Recommended Concentrations


Concentration 4% 5% 6% 7% 8% 9% 10%
Ratio 1:25 1:20 1:17 1:14 1:12 1:11 1:10
Refractometer 2.0 2.5 2.9 3.4 3.9 4.4 4.9

Typical Properties

Appearance-ConcentrateBlue liquid
Appearance- DilutionTransparent Blue
Residual FilmSoft, soluble
pH @ 20:19.1 ± 0.2
Specific Gravity @ 60°F1.07 ± 0.03
Lbs/Gallon8.9 ± 0.1
Flash point, PMCCNone