The problems associated with chip removal during profile boring are highlighted and the effect of using a chip curler pad on the rake face of ISO triangular inserts investigated. The chip types obtained by varying the geometry of the chip curler pads are observed and the conditions under which a forward flowing continuous helical chip is obtained are determined. This chip type is of use when machining ‘through holes’ where the chip can flow along the bore in advance of the boring bar, through the hollow lathe spindle to be collected at the rear of the lathe. This method of chip collection simplifies chip removal problems in profile boring. Some illustrative examples of the effect of cutting conditions on chip radius and pitch of the chip helix are given and the chip form is shown to depend on the workpiece geometry in addition to the Cutting tool/chip curler geometry.