Rotary cutting head with fluid supply ducting

A rotary cutting head for a cutting machine comprising:

• a rotatable support frame having a radially inner region and a radially peripheral portion and being rotatably coupled to a rotation drive unit;
• a plurality of cutter units mounted at or towards the peripheral portion, each of the plurality of units having a cutter disc rotatably mounted at a cutter hub, a radially outer portion of each of the discs by rotation of the discs being configured to abrade rock and create a cut groove therein each of the discs being rotatable relative to the rotatable support frame via each respective hub;
• and
• a plurality of fluid supply ducts extending at the support frame and provided in fluid communication with a first set of nozzles to deliver a fluid to the discs, the first set of nozzles being mounted at the support frame so that the discs are capable of independent rotation relative to the nozzles, and wherein the nozzles are positionally mounted to direct a fluid jet to a region of the discs that are located radially outside of the peripheral portion of the support frame and that define a radially outermost perimeter of the cutting head.