Wait, what is a cutting sap exactly?
If you've ever walked through a machine shop and seen a milky white liquid splashing over a piece of turning steel, you've probably asked yourself what is a cutting sap and what does it actually do for the metal. Most people just call it "coolant" or "cutting fluid," but in a lot of old-school shops or specific regions, you'll hear folks refer to it as "sap" or "suds." Essentially, it's the lifeblood of any heavy-duty machining process, and without it, you'd be burning through expensive drill bits and lathe inserts faster than you could buy them. ...