A flat drill having a handle, and a flat blade formed in the front portion of the handle part. A front portion of the flat blade extends inwardly from the two sides, forming first and second shoulder. The two shoulders continuing to extend and taper inward and upward, forming two tapered sections respectively, a first tapered section and a second tapered section, and having a pointed top. A first groove is formed on a blade part of the first shoulder toward the inside of the flat blade part. The inner edge of the first groove is inclined downward towards outside direction of the first shoulder, forming an angle of greater than 0 degree with respect to a horizontal line of the flat drill.

A holesaw assembly includes a holesaw and a pilot bit. The holesaw includes a hollow cup defining a center axis. The cup has a round base perpendicular to the center axis and a peripheral wall coupled to and extending axially forward of the base to a peripheral edge at a free end of the wall. The pilot bit is received in the holesaw along the center axis. The pilot bit has a shaft received in the base, a cutting head coupled to a front end of the shaft, and an at least partially threaded tip coupled to a front end of the cutting head. The holesaw is free of any radial cutting elements disposed inside the cup between the drill bit and the peripheral wall of the cup.

A boring tool may include a coupling portion which may be at an end of the boring tool, a shank operably coupled to the coupling portion, a cutting portion operably coupled to the shank and a feed screw which may be operably coupled to the cutting portion at an opposite end of the boring tool from the coupling portion. The cutting portion may further include a first paddle, a second paddle, and a third paddle. Each paddle may each comprise a paddle body, defined by a leading edge and a lateral edge. The paddle bodies may be disposed equiangular around a perimeter of the cutting portion. The leading edge may extend away from a longitudinal axis of the boring tool in a direction substantially perpendicular to the longitudinal axis. The lateral edge may extend away from the leading edge in a direction substantially perpendicular to the leading edge.

A boring tool may include a coupling portion which may be at an end of the boring tool, a shank operably coupled to the coupling portion, a cutting portion operably coupled to the shank and a feed screw which may be operably coupled to the cutting portion at an opposite end of the boring tool from the coupling portion. The cutting portion may further include a first paddle, a second paddle, and a third paddle. Each paddle may each comprise a paddle body, defined by a leading edge and a lateral edge. The paddle bodies may be disposed equiangular around a perimeter of the cutting portion. The leading edge may extend away from a longitudinal axis of the boring tool in a direction substantially perpendicular to the longitudinal axis. The lateral edge may extend away from the leading edge in a direction substantially perpendicular to the leading edge.

A contoured rake face cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. The cutting surface itself is profiled, i.e. non-planar, such as concave or convex or other non planar shape, which is preferably formed into an ultra-hard material which is supplied for use in a planar form.

A contoured rake face cutting tool and method of making is disclosed. A rotary cutting tool with a plurality of teeth can cause damage to a work piece during cutting. By orienting the cutting angle of the teeth relative to the rotational central axis to high shear angle such as 50 or 70 degrees, the tool creates a high compression cut which is cleaner and less damaging to the work piece. The cutting surface itself is profiled, i.e. non-planar, such as concave or convex or other non planar shape, which is preferably formed into an ultra-hard material which is supplied for use in a planar form.

A log splitter tool preferably includes a splitter portion and a drive portion. The splitter portion includes a modified cone shape with a concave curved profile formed on a side. A cross section of the cone shape preferably has a twisting three-lobe shape. A helical three-lobe contact thread is formed in the modified cone outer surface. The three-lobe contact thread preferably has angular spacing between each lobe of greater or less than 120-degrees. The three-lobe contact thread preferably has a constant pitch. The size of each thread preferably decreases in size from a bottom of the modified cone to a top of thereof. A top of the modified cone is preferably terminated with a self-drilling tip. The drive portion extends from a bottom of the cone portion. A second embodiment preferably includes a drive shaft rotatably retained in a handle.

A log splitter tool preferably includes a splitter portion and a drive portion. The splitter portion includes a modified cone shape with a concave curved profile formed on a side. A cross section of the cone shape preferably has a twisting three-lobe shape. A helical three-lobe contact thread is formed in the modified cone outer surface. The three-lobe contact thread preferably has angular spacing between each lobe of greater or less than 120-degrees. The three-lobe contact thread preferably has a constant pitch. The size of each thread preferably decreases in size from a bottom of the modified cone to a top of thereof. A top of the modified cone is preferably terminated with a self-drilling tip. The drive portion extends from a bottom of the cone portion. A second embodiment preferably includes a drive shaft rotatably retained in a handle.

The present disclosure relates to technical field of woodworking drills, and in particular to a woodworking drill including: a cutter body; wherein an outer side wall of the cutter body defines a plurality of chip discharge slots that are spirally disposed, and the plurality of chip discharge slots are disposed circumferentially about a center axis of the cutter body; a cutter shank, connected to an end of the cutter body; and an alloy main drill structure, arranged at another end of the cutter body back away from the cutter shank; wherein a plurality of secondary cutting edges are formed on the outer side wall of the cutter body by the plurality of chip discharge slots, and the alloy main drill structure is configured for main drilling wood.

The present disclosure relates to technical field of woodworking drills, and in particular to a woodworking drill including: a cutter body; wherein an outer side wall of the cutter body defines a plurality of chip discharge slots that are spirally disposed, and the plurality of chip discharge slots are disposed circumferentially about a center axis of the cutter body; a cutter shank, connected to an end of the cutter body; and an alloy main drill structure, arranged at another end of the cutter body back away from the cutter shank; wherein a plurality of secondary cutting edges are formed on the outer side wall of the cutter body by the plurality of chip discharge slots, and the alloy main drill structure is configured for main drilling wood.