Cutting tool head for a metalworking tool

A metal machining tool comprising a tool head and a cutting insert removably mounted therein, the tool head comprising:

• a basic holder including a lower support part and an upper clamping portion defining therebetween an insert-receiving pocket in which the cutting insert is removably mounted, wherein a longitudinal length of the cutting insert is longer than a longitudinal length of the pocket;
• a slot extending through the basic holder at a location spaced from the pocket, wherein the clamping portion is joined to a remaining portion of the basic holder by a hinge portion about which the clamping portion is elastically displaceable toward the cutting insert;
• a recess extending through the basic holder substantially parallel to the slot and in communication therewith;
• a nut roll positioned within the recess, the nut roll having a radial axis and a longitudinal axis;
• and
• a clamping screw extending through the slot and into threaded engagement with the nut roll, a longitudinal axis of said clamping screw oriented perpendicularly to a longitudinal axis of said nut roll, wherein the longitudinal axis of the clamping screw extends from a head of the clamping screw to a lower portion of the clamping screw, wherein the clamping screw includes a substantially conical head arranged to enter the slot and engage the upper clamping portion to expand the slot and elastically displace the clamping portion about the hinge portion and toward the cutting insert.

A tool head adapted to receive a cutting insert for chip removal machining, comprising:

• a basic holder including an insert holder formed by a lower support part and an upper clamping portion which define therebetween an insert-receiving pocket;
• a slot extending through the basic holder at a location spaced from the pocket, wherein the clamping portion is joined to a remaining portion of the basic holder by a hinge portion about which the clamping portion is elastically displaceable toward the lower support part;
• a recess extending through the basic holder substantially parallel to the slot and in communication therewith;
• a nut roll positioned within the recess;
• a clamping screw extending through the slot and into threaded engagement with the nut roll, wherein the clamping screw includes a substantially conical head arranged to enter the slot and engage the upper clamping portion to expand the slot and elastically displace the clamping portion about the hinge portion and toward the support part;
• wherein the recess extends through first and second side surfaces of the basic holder, wherein the second side surface is remote from the insert holder and includes serrations, each serration extending parallel to a direction in which an insert is installed into the insert-receiving pocket.