Lubricants for Milling Machines

[Rickabilly]

Just my opinion here, but as a design engineer quite often after designing a piece of equipment you are asked to recommend lubes for it, so you just go to the nearest catalogue of your company's usual supplier and pick out the nearest thing that looks like it'll do the job, I would guess that this is the origin of the grades in the manual.

Many years (15) ago I designed a line of Limited slip differentials and recommended a lubricant to one particular customer, about a decade later I bumped into that customer who informed me that he had not been able to obtain that lube any more but had gone to the trouble of mixing two other oils in order to get exactly the same properties as recommended by his oils supplier, I didn't have the heart to tell him, that I had literally just looked in my catalogue for LSD oils and picked the cheapest one off the list that wouldn't affect the bronze parts and there was nothing more critical in my choice than that.

I would suggest that the oil manufacturers would be better qualified to specify a lubricant than most manufacturers, as the machine manufacturers are not lubrication specialists.
Regards
Rick