Hmmm...you specified in some detail, how you want the answer,
but you didn't tie-down the question well.
And you posted to a variety of hobby groups and a few pro groups.
Water works for some material, kerosine for others, oil for this and
emulsifying oil for that.
On 19 Jan 2004 02:50:21 -0800, alanh firstname.lastname@example.org (Alan Horowitz)
If you haven't seen it then you might try:
Here are some factors I identify as possibly being important depending
Speed, feed and depth of the cutting operation
Type, hardness and microstructure of the metal being machined
Coolant's applicable temperature operating range
Optimal concentration and pH ranges
Dimensional control of parts
Machine tool maintenance costs
Downtime for tool and wheel changes
Range of compatible materials
Tramp oil rejection
Ability to settle out solids
Resistance to bacterial growth
Effect on production costs
Usage over time
Disposal &/or recycling
Tool and wheel life
Ease of fluid maintenance and quality control
Ability to separate fluid from the work and cuttings
Storage practices Surface tension
Hard water resistance
Capacity of recycled coolant to prevent galvanic attack
Foaming nature and resistance
Ease of disposal
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