Metal Cutting Fluids Why do we need them?. Cooling Lubrication Also provides:- Swarf Flushing Corrosion Protection. Metalworking Fluids. Basic Principles of Metal CuttingFluids ; What they are & how to use them correctly. What are neat cutting oils?.
Basic Principles of Metal CuttingFluids ; What they are & how to use them correctly
The performance of a neat cutting oil is influenced by 3 factors:-
Viscosity (at specific temperature)
Measured in centistokes (cSt @ 40c)
Range from 5 to 40 cSt
Water = 1cSt
Hydraulic = 32cSt
Highly refined oils of high, medium or low viscosity
Typically phosphorous compounds or ZDDP
Usually sulphurised esters or polysulphides
-live in the presence of airAnaerobic bacteria
-live in the absence of air(bad eggs)
-visible organism (rubber-like)
Water hardness expressed as ppm. (parts per million )
as calcium carbonate.
If concentration becomes too high.
If concentration becomes too low.
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0
acceptable to skin
Antisep Biocidal Cleaner (A.B.C.) kills bacteria & dissolves dirt to ensure the new coolant has a good start.
There is an increasing demand for products that are ‘FREE’- from e.g.:-
Can react with amines to form ‘nitrosamines’ (carcinogenic).
Can react with nitrogen from the air to form ‘nitrosamines.
Nitrite/DEA in fluids is a health and safety issue, not environmental
Disposal by burning can form dioxin, a carcinogen
Special incinerators needed for safe disposal
Disposal cost is very high in Europe
Chlorine is an environmental issue, not health and safety
Preventing respiratory diseases and metalworking fluids
ScandMist air filtration equipment