I currently have a hodge podge coolant delivery system for my BOT (Bolt-On Turret) ST-20 lathe. I was thinking this might be a good resource to see how others get coolant to the cut points.
Coolant nozzle on face of boring holder (I am not happy with this so far)
Through hole coolant of boring bar, used plugs on face of boring holder and face plate at other end
Ball Swivel nozzle with right angle hole
Through hole coolant of boring bar, tapped into back of boring holder and coolant line to end of boring bar
Copper tubing on a right angle fitting, bend tubing to position best flow
Face plate on turret with swivel coolant nozzles