MidShire CoolCut MS-20

Product Overview

MidShire CoolCut MS-20 is a semi-synthetic metalworking fluid concentrate designed for use in a wide range of cutting, grinding, milling, turning, drilling, and tapping operations. The semi-synthetic formulation combines the cooling benefits of water-based fluids with the lubrication and surface finish improvements associated with oil-based products.

The product is diluted with water prior to use. Concentrate addition rates will vary depending on the operation — see dilution guidance below. CoolCut MS-20 is suitable for use with ferrous metals including steel and cast iron, and with most aluminium alloys. Always test compatibility with copper alloys and other non-ferrous metals before full use.

Typical Applications

General machining — turning, milling, drilling on ferrous metals
Surface and cylindrical grinding operations
Tapping and threading operations
Broaching and reaming
Aluminium alloy machining (test compatibility first)
General workshop cutting fluid applications

Key Features & Benefits

Semi-synthetic formulation — good cooling and lubrication balance
Good corrosion protection for both workpiece and machine surfaces
Stable emulsion — resists biological degradation and maintains sump life
Low foaming tendency — suitable for high-pressure coolant systems
Good tramp oil rejection — helps maintain sump cleanliness
Operator-friendly formulation — low skin irritation potential at working dilutions
Clear to slightly hazy working solution — good visibility of the cutting zone

Technical Data

Product Name	MidShire CoolCut MS-20
Product Type	Semi-Synthetic Metalworking Fluid Concentrate
Appearance (concentrate)	Clear to pale yellow liquid
pH (concentrate)	9.0–9.5
pH (5% working solution)	8.5–9.0
Typical dilution — general machining	5–8% in water
Typical dilution — heavy cutting	8–10% in water
Typical dilution — grinding	3–5% in water
Recommended water hardness	100–300 ppm (CaCO₃)
Refractometer factor	approx. 1.2

Dilution & Mixing Guidance

Always add concentrate to water — not water to concentrate
Use clean, good quality water — very hard or very soft water may affect performance
Check concentration regularly using a refractometer
Monitor pH regularly — a drop below 8.5 may indicate biological contamination
Dispose of spent fluid in accordance with local environmental regulations