What does 'dry machining' refer to in CNC operations?

'Dry machining' in CNC operations refers to the practice of cutting without the use of coolant. This technique relies on proper selection of cutting tools, feed rates, and spindle speeds to manage heat and wear, as coolant is typically used to reduce friction and remove heat generated during machining processes.

The advantage of dry machining includes environmental benefits, as it eliminates the need for coolant disposal and reduces cleaning requirements. Additionally, dry machining can sometimes enhance visibility of the machining process, making it easier for operators to monitor cutting conditions and tool wear.

Other options such as cutting with coolant, employing air pressure, or any form of cutting in a dry environment do not accurately describe the concept of dry machining, which distinctly emphasizes the absence of any coolant during the cutting process.