Replaceable insert cutting tools

A replaceable insert cutting tool assembly for seating in a tool mounting opening in a cutter body having a base wall with a threaded bore and opposite side walls parallel to the plane of a tool to be inserted, comprising:

• a tool element having a planar body and at least one cutting edge thereon, the tool element being positioned against a first side wall of the opening;
• a pressure gib spaced apart from the tool element and including a first planar side wall flush against the second side wall of the opening, a second opposite planar side wall slanted toward the cutting edge of the tool element, and a cavity including a base opening aligned with the threaded bore;
• a tool gib disposed between the pressure gib and tool element and including a first planar side wall flush against the tool element and a second opposite planar side wall slanted away from the cutting edge of the tool element, the tool gib engaging the pressure gib and tool element;
• and
• a mounting screw extending though the cavity and the base opening in the pressure gib and engaging in the threaded bore in the cutter body while abutting a portion of the pressure gib to generate downward force converted by the engaging side walls of the pressure gib and tool gib into lateral forces acting on the tool element.

A replaceable insert cutting tool arrangement for woodworking tools having peripheral pockets in which the cutting tools are to be inserted and interchanged, comprising:

• means defining a cutting tool pocket having opposite substantially parallel side walls and a base, defining a cavity having leading and trailing edge sides in the tool, the base including a threaded bore;
• a knife engageable against a trailing edge side wall of the pocket and having a cutting edge periphery extending outside the periphery of the tool;
• the knife gib having a flat surface engaging the interior flat surface of the knife, and having a tapered planar face on the opposite side from the knife;
• a pressure gib including a bore disposed about the threaded bore in the tool and having a first flat face engaging a leading edge side wall of the pocket and an angled planar side wall engaging the angled side wall of the knife gib, the angled face of the knife gib diverging in the direction away from the cutting edge;
• a threaded member disposed within the bore in the pressure gib and including a surface engaging the pressure gib and a threaded portion engaging the threaded bore in the tool, whereby when the threaded member is tightened in the threaded bore, it urges the pressure gib in the same direction and the angled mating surfaces increase the lateral force against the knife to securely maintain position, while the threaded member can readily be loosened to allow release and interchange of the knife.

A replaceable cutting tool assembly for a planar knife edge member to be held in a support body comprising the combination of:

• a knife gib member having a planar face for engaging the knife member, and a planar angled face diverging outwardly relative to the knife-engaging face in the direction away from the knife edge;
• a threaded securement member engaging into the support body along an axis parallel to the plane of the knife and in a direction away from the knife edge;
• and
• a pressure gib having an angled side face engageable against the angled face of the knife gib and including a bore for receiving the threaded securement member, and a seating surface for engaging the securement member, such that threading of the securement member in the direction away from the knife edge converts the downward wedging force of the securement member into a sidewise engagement force from the engaging angled side faces against the knife gib and the knife to maintain the knife in position in the body.