Thread cutting tool

A thread-milling tool comprising an elongate rotary shank having a lengthwise axis;

• a pocket formed in said shank, said pocket having a flat bottom;
• a cutting insert which is of flat or substantially flat plate form;
• and means for removably securing a principal surface thereof against said flat bottom of said pocket, said cutting insert having a plurality of cutting edges one of which projects laterally of said shank, each of said cutting edges being formed with a plurality of thread-form teeth arranged in a straight line, the line of teeth on said one edge extending parallel to said lengthwise axis, and said teeth being of identical profile.

A thread-milling tool comprising an elongate rotary shank having a lengthwise axis;

• a V-shaped pocket formed in said shank, said pocket having a flat bottom;
• a cutting insert which is of flat or substantially flat triangular plate form and having a principal surface thereof disposed against said flat bottom of said pocket, said insert having a central aperture, a screw extending through said central aperture and into the flat bottom of the pocket to removably secure the insert, said cutting insert having one edge thereof projecting laterally of said shank, said one edge being formed with a plurality of thread-form teeth arranged in a straight line which line extends parallel to said lengthwise axis, and said teeth being of identical profile.

A thread milling tool comprising ann elongate rotary shank having a lengthwise axis;

• a pocket formed in said shank, said pocket having a flat bottom;
• a single cutting insert which is of a triangular flat or substantially flat plate form;
• and means for removably clamping a principal surface of said cutting insert against said flat bottom of said pocket, said cutting insert having a cutting edge projecting laterally of said shank, said cutting edge being formed with a plurality of thread-form teeth arranged in a straight line which extends parallel to said lengthwise axis, and said teeth being of identical profile.

A thread milling tool comprising an elongate rotary shank having a lengthwise axis;

• a pocket formed in said shank, said pocket having a flat bottom;
• a single cutting insert which is of a flat or substantially flat plate form;
• and means for removably clamping a principal surface of said cutting insert against said flat bottom of said pocket, said cutting insert having a cutting edge projecting laterally of said shank, said cutting edge being formed with a plurality of thread-form teeth arranged in a straight line which extends parallel to said lengthwise axis, and said teeth being of identical profile and being inclined at a small angle to a normal too the principal faces of said insert.