Cutting tool, cutting tool holder, and a cutting insert therefor

A cutting tool holder configured for mounting thereon a cutting insert to form a cutting tool, the tool holder extending along a central axis and comprising:

• a mounting portion having a seat surface oriented generally perpendicular to the central axis;
• and
• at least two securing extensions projecting from the seat surface in a direction generally parallel to that of the central axis,
• each of the extensions being formed, at an end remote from the seat surface with a latch portion extending towards the central axis,
• the latch portion having an under surface and a top surface, both surfaces oriented generally transversely to the central axis such that the under surface is disposed between the seat surface and the top surface,
• each of the extensions being further formed with a side surface extending between the under surface and the seat surface to form a securing pocket defined between the seat surface, the side surface and the under surface, configured for receiving therein a portion of the cutting insert,
• wherein the under surface is oriented parallel to the seat surface and the top surface is oriented at an angle to the side surface other than 90 deg.

A cutting insert configured to be mounted onto a cutting tool holder that extends along a central axis, the cutting insert comprising:

• a mounting portion having an insert under surface oriented generally transversly to the central axis;
• and
• at least two securing extensions projecting from the insert under surface in a direction generally parallel to that of the central axis,
• each of the extensions being formed, at an end remote from the insert under surface with a bayonet portion extending towards the central axis,
• the bayonet portion having a bayonet top surface and a bayonet bottom surface, both surfaces oriented generally transversely to the central axis such that the bayonet top surface is disposed between the bayonet bottom surface and the insert under surface,
• each of the extensions being further formed with a bayonet insert side surface extending between the insert under surface and the bayonet top surface to form a securing pocket defined between the insert under surface, the side surface and the bayonet top surface, configured for receiving therein a latch portion of the cutting tool holder,
• wherein the bayonet top surface is oriented parallel to the bayonet bottom surface and the insert under surface is oriented at an angle to the side surface other than 90 deg.

A cutting tool holder configured for mounting thereon a cutting insert to form a cutting tool, the cutting tool holder extending along a central axis and comprising:

• a mounting portion having a seat surface oriented generally perpendicular to the central axis;
• and
• at least two securing extensions extending in a direction generally parallel to that of the central axis,
• each of the extensions being formed, at an end remote from the seat surface with a latch portion extending towards the central axis,
• the latch portion having an under surface and a top surface, both surfaces oriented generally transversely to the central axis such that the under surface is disposed between the seat surface and the top surface,
• each of the extensions being further formed with a side surface extending between the under surface and the seat surface, such that there is formed a securing pocket defined between the seat surface, side surface and under surface, configured for receiving therein a portion of the cutting insert,
• wherein the top surface is formed with a securing port configured for receiving therein at least a part of a securing mechanism used for securing the cutting insert onto the cutting tool holder when the cutting insert is mounted onto the cutting tool holder.