Locking pin for a tool holder

A tool holder of the type having a recess into which a cutting insert is removably secured by passing a locking pin through a cutting insert bore having a bore wall, which extends from a first countersunk portion of an outer face of said cutting insert to an inner face of said cutting insert, and into a first bore of said tool holder, and wherein said cutting insert is caused to be pressed into said recess by a drawing member which extends through a second bore of said tool holder and engages said locking pin, the improvement comprising a locking pin having a first portion dimensioned for insertion through said cutting insert bore;

• a second adjacent portion dimensioned for insertion into said first bore;
• first means protruding from said first portion in a first direction for exerting a first positive locking pressure in a first direction against said countersunk portion of said cutting insert bore at said outer face, so that said cutting insert can be pressed downward against one face of said recess;
• second means protruding from said first portion in a second direction perpendicular to said first direction, for exerting a second positive locking pressures in a second direction against said bore wall so that said cutting insert can be pressed backward against another face of said recess;
• and, third means in the form of a surface area of said second portion for engagement with said drawing member so that said locking pressures can be exerted in said first and second directions.

A locking pin for use with a tool holder of the type having a recess into which a cutting insert is removably secured by passing said locking pin through a cutting insert bore having a bore wall, which extends from a first countersunk portion of an outer face of said cutting insert to an inner face of said cutting insert, and into a first bore of said tool holder, and wherein said cutting insert is caused to be pressed into said recess by a set pin which extends through a second bore of said tool holder and engages said locking pin, said locking pin having a first end and a second end and comprising:

• a first portion being dimensioned for insertion through said cutting insert bore;
• a second adjacent portion being dimensioned for insertion into said first bore and including an axis which extends from said second end towards said first portion;
• first means in the form of a lip which extends from said first portion at said first end of said pin in a first direction for exerting a first positive locking pressure in a first direction against said countersunk portion of said cutting insert bore at said outer face, so that said cutting insert can be pressed against one face of said recess;
• second means in the form of a raised area of said first portion located between said first end and said second end of said pin and protruding from said first portion in a second direction perpendicular to said first direction, for exerting a second positive locking pressure in a second direction against said bore wall so that said cutting insert can be pressed against another face of said recess;
• and,
• third means in the form of a pocket extending said second portion at an angle relative to said axis for engagement with said drawing member so that said locking pressures can be exerted in said first and second directions.

A tool holder of the type having a recess into which a cutting insert is removably secured by passing a locking pin through a cutting insert bore having a bore wall, which extends from a first countersunk portion of an outer face of said cutting insert to an inner face of said cutting insert, and into a first bore of said tool holder, and wherein said cutting insert is caused to be pressed into said recess by a drawing member which extends through a second bore of said tool holder and engages said locking pin, the improvement comprising a locking pin having a first end and a second end and having a first portion dimensioned for insertion through said cutting insert bore;

• a second adjacent portion dimensioned for insertion into said first bore and including an axis which extends from said second end towards said first portion;
• first means in the form of a lip which extends from said first portion at said first end of said pin in a first direction for exerting a first positive locking pressure in a first direction against said countersunk portion of said cutting insert bore at said outer face, so that said cutting insert can be pressed against one face of said recess;
• second means in the form of a raised area of said first portion located between said first end and said second end of said pin and protruding from said first portion in a second direction perpendicular to said first direction, for exerting a second positive locking pressure in a second direction against said bore wall so that said cutting insert can be pressed against another face of said recess;
• and, third means in the form of a pocket extending into said second portion at an angle relative to said axis for engagement with said drawing member so that said locking pressures can be exerted in said first and second direction.