Methods and apparatus for delivering a cryogenic cutting fluid such as liquid nitrogen to a cutting tool in a rotatable cutting assembly, including a supply line for supplying cryogenic cutting fluid, a rotatable cutting assembly, and a rotary coupling, are provided. The rotatable cutting assembly includes at least one cryogenic cutting fluid input in a coupling region thereof to receive the cryogenic cutting fluid from the supply line, and at least one cryogenic cutting fluid delivery line. Each cryogenic cutting fluid delivery line is fluidly coupled to at least one input to receive cryogenic cutting fluid from the input, and terminates so as to be fluidly coupled to a cutting portion of said cutting tool to thereby deliver the cryogenic cutting fluid to that cutting portion. The coupling is rotatably attached to the coupling region of the rotatable cutting assembly, and fluidly links the supply line to the cutting assembly inputs so that the cryogenic cutting fluid is permitted to flow from the supply line to the cutting assembly without substantial leakage.