Drill systems with coolant delivery arrangements and methods

A drilling system comprising,

• a holder having a rotational axis and first and second clamp arms with side surfaces forming a mounting slot,
• a cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis and rake surfaces adjacent the cutting edges positioned above the first and second clamp arms when the insert is mounted in the mounting slot,
• wherein the holder comprises at least one coolant hole disposed through the first and second clamp arms oriented at an angle to one of the sides of the insert with a coolant outlet from the coolant hole at a position below the rake surfaces of the insert, wherein coolant is dispersed across the entire rake face of each cutting edge after impinging on the side of the insert from the coolant outlet, wherein the holder has flutes adjacent to the first and second clamp arms for evacuation of chips formed by the cutting edges of the insert and the coolant outlet is positioned adjacent to the flute.

A drilling system comprising,

• a holder having a rotational axis and first and second clamp arms with side surfaces forming a mounting slot,
• a cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis and rake surfaces adjacent the cutting edges positioned above the first and second clamp arms when the insert is mounted in the mounting slot,
• wherein the holder comprises at least one coolant hole disposed through the first and second clamp arms oriented at an angle to one of the sides of the insert with a coolant outlet from the coolant hole at a position below the rake surfaces of the insert, wherein coolant is dispersed across the entire rake face of each cutting edge after impinging on the side of the insert from the coolant outlet, wherein the top edge of the side surfaces of the slot formed in the first and second clamp arms below the rake faces is angled from a top to a bottom and the coolant outlet is positioned adjacent the bottom.

A drilling system comprising a holder having a rotational axis and first and second clamp arms with side surfaces forming a mounting slot,

• a cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis and rake surfaces adjacent the cutting edges positioned above the first and second clamp arms when the insert is mounted in the mounting slot, wherein the holder comprises at least one coolant hole disposed through the first and second clamp arms with a coolant outlet from the coolant hole at a position below the rake surfaces of the insert, with the coolant hole directed at the sides of the insert at a position below the rake surfaces to disperse coolant across the entire rake face of each cutting edge, and wherein at least one opening is created at the top of the first and second clamp arms by at least one chamber in association with the insert and the side surface of the first and second clamp arms in the mounting slot.

A drilling system comprising,

• a holder having a rotational axis and first and second clamp arms with side surfaces forming a mounting slot,
• a cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis and rake surfaces adjacent the cutting edges positioned above the first and second clamp arms when the insert is mounted in the mounting slot,
• wherein the holder comprises at least one coolant hole disposed through the first and second clamp arms oriented at an angle to one of the sides of the insert with a coolant outlet from the coolant hole at a position below the rake surfaces of the insert, wherein coolant is dispersed across the entire rake face of each cutting edge after impinging on the side of the insert from the coolant outlet, wherein the coolant outlet is formed over only a portion of the extent of the top of the side surface of the mounting slot in the first and second clamp arms below the rake surfaces.

A method of delivering coolant in a drilling operation using a drilling tool comprising a holder having first and second ends and a rotational axis, with the second end of the holder configured to be fixedly attached in a drilling machine, and the first end of the holder comprising a mounting slot with side surfaces and a cutting insert positioned in the mounting slot with side surfaces positioned adjacent the side surfaces of the mounting slot, and wherein the insert includes first and second cutting edges extending from the rotational axis, and first and second rake faces adjacent the cutting edges and above the mounting slot of the holder, and wherein the holder further includes at least one coolant hole disposed through the first and second clamp arms oriented at an angle to one of the sides of the insert with a coolant outlet from the coolant hole at a position below the rake surfaces of the insert, wherein the top edge of the side surfaces of the slot formed in the first and second clamp arms below the rake faces is angled from a top to a bottom and the coolant outlet is positioned adjacent the bottom.

A drilling system comprising,

• a holder having a rotational axis and first and second clamp arms with a mounting slot having side surfaces,
• a cutting insert with sides positioned adjacent the side surfaces of the mounting slot and cutting edges extending from the rotational axis and rake surfaces adjacent the cutting edges positioned above the first and second clamp arms when the insert is mounted in the mounting slot, wherein the holder comprises at least one coolant hole disposed through the first and second clamp arms with a coolant outlet substantially at the intersection of the top edge of the side surfaces of the slot formed in the first and second clamp arms with the side of the insert at a position below the rake surfaces of the insert, wherein coolant is dispersed from the coolant hole through the coolant outlet directly onto the side of the insert and across the entire rake face of each cutting edge after impinging on the side of the of the insert.