Turning tool for form-turning workpieces

A turning tool for form-turning workpieces, comprising a holder, a cutting insert mounted on the holder, and a releasable clamp element for clamping the insert to the holder;

• the cuffing insert being elongated along an axis and including a non-linear cuffing edge at an axial end thereof;
• the cuffing insert including a first support surface and a first hole;
• the holder including a second support surface and a second hole;
• the second hole aligned with the first hole for receiving the clamp which presses the first and second support surfaces together;
• each of the first and second support surfaces including first and second sets of grooves oriented substantially perpendicularly to one another;
• the grooves of each set extending substantially parallel and adjacent to one another and defining ridges therebetween, at least one of the first and second support surfaces having its first and second sets of grooves arranged in respective first and second regions of that support surface, wherein such first set of grooves is in non-intersecting relationship with such second set of grooves in the first and second regions;
• the ridges of the first set of grooves of the cutting insert engaging the ridges of the first set of grooves of the holder in the first region to support the cuffing insert against movement in a first direction;
• the ridges of the second set of grooves of the cuffing insert engaging the ridges of the second set of grooves of the holder in the second region to support the cuffing insert against movement in a second direction substantially perpendicular to the first direction;
• one of the first and second holes being elongated in a direction intersecting the cutting edge to enable the insert to be fed in that direction relative to the holder.