Clamp for retaining a block of material on a machining table, clamping device comprising said clamp and method of clamping a block of material onto a machining table

A clamp for retaining a block of material on a machining table, the clamp comprising:

• a body having a first face and at least one first front face respectively oriented toward the machining table and the block of material when in use, as well as a connecting system for connecting the clamp in a demountable manner to the machining table,
• the body of the clamp comprising:
• a nose projecting relative to the first front face having a second front face parallel to the first front face, as well as first and second edges connecting the first and second front faces, said nose being sized to be housed in a groove in a block of material when in use,
• at least one internally threaded hole opening at least partly at a level of the second front face and having an axis forming a non-zero angle with the first face and the second front face, and
• the clamp comprising:
• at least one grub screw that screws into the internally threaded hole having a pointed free end configured to penetrate into the block of material when in use when screwing in the grub screw.