Cutting tools and cutting inserts including internal cooling

A cutting tool, comprising:

• a tool holder;
• a fastener;
• and
• a cutting insert;
• wherein the cutting insert comprises
• at least one cutting edge,
• at least one fastener bore adapted to accept a fastener and removably fasten the cutting insert to the tool holder, and
• a plurality of unconnected coolant flow recesses in the fastener bore adapted to direct a coolant toward a head portion of the fastener when the cutting insert is fastened to the tool holder by the fastener;
• and
• wherein the tool holder comprises
• at least one coolant bore adapted to direct the coolant from the tool holder to a single coolant flow recess of the plurality of unconnected coolant flow at a time, and
• wherein the head portion of the fastener and the plurality of unconnected coolant flow recesses of the fastener bore define a gap that directs the coolant to the at least one cutting edge of the cutting insert.

A cutting insert having an internal coolant system, comprising

• at least one cutting edge;
• at least one fastener bore adapted to accept a fastener for removably fastening the cutting insert to a tool holder;
• and
• at least one through cavity positioned along the fastener bore;
• wherein the at least one through cavity extends from a top face of the cutting insert to a bottom face of the cutting insert and is adapted to direct a coolant fluid through the cutting insert and toward the at least one cutting edge when the cutting insert is fastened to a tool holder by a fastener, and wherein only one through cavity of the at least one through cavity is configured to receive the coolant at a time.

A cutting tool having an internal coolant system, comprising:

• a cutting insert;
• a tool holder;
• and
• a fastener;
• wherein the cutting insert comprises
• at least one cutting edge,
• at least one fastener bore adapted to accept a fastener to removably fasten the cutting insert to the tool holder, and
• a plurality of discrete through cavities adapted to direct a coolant through the cutting insert and toward a head portion of the fastener when the cutting insert is fastened to the tool holder by the fastener;
• and
• wherein the tool holder comprises
• a coolant bore adapted to direct the coolant from the tool holder exclusively to a single discrete through cavity of the plurality of discrete through cavities of the cutting insert when the cutting insert is fastened to the tool holder, and
• wherein the head portion of the fastener and the plurality of discrete through cavities of the cutting insert define a gap that directs the coolant to the at least one cutting edge of the cutting insert.

A cutting tool, comprising:

• a tool holder comprising a coolant source and a coolant port in fluid communication with the coolant source;
• a fastener;
• a cutting insert comprising:
• a plurality of cutting edges, wherein the plurality of cutting edges comprises an active cutting edge;
• and
• a fastener bore adapted to receive the fastener to secure the cutting insert to the tool holder, wherein the cutting insert is fastenable to the tool holder in a position;
• a plurality of channels defined between the fastener and the cutting insert, wherein the plurality of channels comprises an active channel, and wherein only the active channel of the plurality of channels is in fluid communication with the coolant port and adapted to direct a coolant from the coolant port toward the active cutting edge when the cutting insert is secured to the tool holder in the position.