A cutting tool for cutting a hole into a fluid transportation pipe and for retaining a cutting chip is provided. The tool (1) comprises a main body (2) having an end which is prolonged by a tapered part (3), the tool (1) further comprising an accommodation space (11), the tool being configured to receive a cutting chip in the accommodation space (11) via an opening (10) which extends at least from a geometrical apex (5) of the tapered part (3) to the periphery of the main body (61), and the tool (1) further has a cutting edge (4) extending at least from the geometrical apex (5) of the tapered part (3) to the periphery of the main body (2) of the cutting tool (1). The main body (2) is made of a material that differs from a material of which the cutting edge (4) is made.

The invention relates to a single-lip deep hole drill comprising a drill head, wherein the drill head has a drill diameter, a blade and a channel for chip removal, wherein the blade extends outwards from a rotational axis (23) up to the perimeter of the drill head, wherein the blade has a cutting surface (33) and wherein the channel is bordered by a chip forming surface (15), wherein the chip forming surface (15) has two sections (19, 21) such that a first section (19) of the chip forming surface (15) extends in the radial direction from the rotational axis (23) up to a first diameter, a second section (21) of the chip forming surface (15) connects to the first section (19) in the radial direction, the first section (19) is positioned above the cutting surface (33), and the second section (21) is positioned nearer to the cutting surface (33) than the first section (19). (H1>0; H1>H2)

A single-lip drill including at least one cutting edge on a drill head has a face which is concave along at least 75 percent of the width thereof and substantially along the entire length thereof, all the way to, and inclusive of, the cutting edge.

A cutting tool 10 includes: a shank part 14 that is substantially cylindrical in shape and provided at a base end portion 10b of the cutting tool 10; a cutting edge 18 located at a leading end portion 10t of the cutting tool 10; a chip discharge groove 30 formed from the cutting edge 18 toward the base end portion 10b of the cutting tool 10, for guiding and discharging chips generated during cutting; and a plurality of groove-like coolant flow paths 40 provided on a periphery of the cutting tool 10, for supplying coolant toward the leading end portion 10t. In a leading end view where the cutting tool 10 is viewed from the leading end portion 10t along the central axis 10A extending in a longitudinal direction of the cutting tool 10, a first coolant flow path 41 of the plurality of coolant flow paths 40 is located at an upper side relative to the cutting edge 18.