Why do so many CNC mills come with a pump to flood the cutting area with lubricant (and a full enclosure to contain the splashes) and so few mills have this type of lubrication? Sure, I've seen the flexible lube arm with a nozzle on some mills, but these are not the rule.
Is this because a CNC machine works continuously and faster (probably close to the maximum speed for machining) for long periods, generating more heat?
Is this because a CNC machine works continuously and faster (probably close to the maximum speed for machining) for long periods, generating more heat?