A hole saw is disclosed herein. The hole saw can include a cylindrical body having inner and outer cylindrical surfaces concentric to each other about a first axis. The body can also extend along the first axis between first and second opposite ends. The hole saw can also include a plurality of teeth each including a tooth body and a carbide tip positioned on the tooth body and forming a tooth face. Each of the tooth faces can define one or more cutting edges. The teeth can be arranged in an alternating pattern including a first tooth in the form of a chisel tooth, a second tooth immediately behind the first tooth and in the form of an offset grind tooth, and a third tooth immediately behind the second tooth and in the form of a triple chip grind tooth.

A hole saw is disclosed herein. The hole saw can include a cylindrical body having inner and outer cylindrical surfaces concentric to each other about a first axis. The body can also extend along the first axis between first and second opposite ends. The hole saw can also include a plurality of teeth each including a tooth body and a carbide tip positioned on the tooth body and forming a tooth face. Each of the tooth faces can define one or more cutting edges. The teeth can be arranged in an alternating pattern including a first tooth in the form of a chisel tooth, a second tooth immediately behind the first tooth and in the form of an offset grind tooth, and a third tooth immediately behind the second tooth and in the form of a triple chip grind tooth.

A drill bit for drilling laminates includes at least two main chip flutes separated by corresponding webs. The free end faces of the webs form relief surfaces. At least one secondary flute, which is formed in the periphery of each of the webs divides the web into a main and a secondary web. A main cutting edge is formed by the intersection of a main chip flute and a relief surface on the main web. A secondary cutting edge is formed by the intersection of the secondary flute with a relief surface on the secondary web following the main cutting edge in the direction of operation, the main cutting edges extending to the nominal radius of the drill. The secondary cutting edges terminate at a distance before the nominal radius and axially project from the main cutting edge by an axial overhang at least along their radially outer section.

A drill bit for drilling a hard material includes a drill bit blade defining an axis of rotation and including a first side and a second side positioned respectively on first and second lateral sides of the axis of rotation. The drill bit blade further includes a blade tip point that is laterally biased relative to the axis of rotation, and a first blade edge and a second blade edge starting at the blade tip point and ending at the first side and second side, respectively. An angular bisector between the first and second blade edges is inclined at an angle relative to the axis of rotation.

A drill bit for drilling laminates includes at least two main chip flutes separated by corresponding webs. The free end faces of the webs form relief surfaces. At least one secondary flute, which is formed in the periphery of each of the webs divides the web into a main and a secondary web. A main cutting edge is formed by the intersection of a main chip flute and a relief surface on the main web. A secondary cutting edge is formed by the intersection of the secondary flute with a relief surface on the secondary web following the main cutting edge in the direction of operation, the main cutting edges extending to the nominal radius of the drill. The secondary cutting edges terminate at a distance before the nominal radius and axially project from the main cutting edge by an axial overhang at least along their radially outer section.

Twist drill bit having a cutting tip (3) with a stepped structure, consisting of a shank (1), a guide region (2) and the adjoining cutting tip (3) with a stepped structure, the stepped structure of which is interrupted by two flutes (5) winding about a drill bit axis (0), wherein the cutting tip (3) with a stepped structure has a drill bit tip (3.1) with a radius (r.sub.0), at which a pair of first main lips (4.1) are formed, and a multiplicity of coaxially arranged cutting steps (3.2), which each have a conical step portion (3.2.1), in which in each case a pair of further main lips (4.2.sub.a-4.2.sub.m) are formed, and a cylindrical step portion (3.2.2), wherein the cylindrical step portions (3.2.2) have, towards the shank (1), an increasingly large radius (r.sub.a-r.sub.m), wherein the difference between in each case one of the radii and the next one of the radii (r) is chosen such that, upon rotation about the drill bit axis (0), the pair of further main lips (4.2.sub.a-4.2.sub.m) arranged therebetween sweep in each case over an annular face (A.sub.a-A.sub.m), coaxial with the drill bit axis (0), on an imaginary plane (E) arranged perpendicularly to the drill bit axis (0), and the annular faces (A.sub.a-A.sub.m) have an identical surface area, such that, during drilling, an identical chip volume is carried away with each pair of the further main lips (4.2.sub.a-4.2.sub.m).