A chamfer tool for producing a chamfer on a workpiece, the chamfer tool comprising: - a tool holder made of cemented carbide, which extends along a central axis and comprises a plurality of slot-shaped cutting insert receptacles (18a-18e) of same shape and size that are arranged distributed around a circumference of the tool holder, wherein each of the cutting insert receptacles (18a-18e) comprises two opposing lateral abutment surfaces (24, 28) and a base abutment surface arranged between the two lateral abutment surfaces (24, 28), extending transversely thereto and forming a base of the respective cutting insert receptacle (18a-18e); - a plurality of cutting inserts (20a-20e) of same shape and size, being made of CVD thick-film diamond, wherein each of the cutting inserts is fixed in one of the plurality of cutting insert receptacles (18a-18e) in a firmly bonded manner, wherein the cutting inserts (20a-20e) each comprise two opposing lateral surfaces (22, 26), which abut against or are connected in a firmly bonded manner to the two lateral abutment surfaces (24, 28) of the respective cutting insert receptacle (18a-18e), and a lower surface arranged between the two lateral surfaces (22, 26) and extending transversely thereto, wherein the lower surface abuts against or is connected in a firmly bonded manner to the base abutment surface of the respective cutting insert receptacle (18a-18e), and wherein the cutting inserts (20a-20e) each project out of the respective cutting insert receptacle (18a-18e) both in an axial direction, which is parallel to the central axis of the tool holder, and transversely to the axial direction and each comprises a main cutting edge which is oriented at a first acute angle (γ) to the central axis of the tool holder. - a tool holder made of cemented carbide, which extends along a central axis and comprises a plurality of slot-shaped cutting insert receptacles (18a-18e) of same shape and size that are arranged distributed around a circumference of the tool holder, wherein each of the cutting insert receptacles (18a-18e) comprises two opposing lateral abutment surfaces (24, 28) and a base abutment surface arranged between the two lateral abutment surfaces (24, 28), extending transversely thereto and forming a base of the respective cutting insert receptacle (18a-18e); - a plurality of cutting inserts (20a-20e) of same shape and size, being made of CVD thick-film diamond, wherein each of the cutting inserts is fixed in one of the plurality of cutting insert receptacles (18a-18e) in a firmly bonded manner, wherein the cutting inserts (20a-20e) each comprise two opposing lateral surfaces (22, 26), which abut against or are connected in a firmly bonded manner to the two lateral abutment surfaces (24, 28) of the respective cutting insert receptacle (18a-18e), and a lower surface arranged between the two lateral surfaces (22, 26) and extending transversely thereto, wherein the lower surface abuts against or is connected in a firmly bonded manner to the base abutment surface of the respective cutting insert receptacle (18a-18e), and wherein the cutting inserts (20a-20e) each project out of the respective cutting insert receptacle (18a-18e) both in an axial direction, which is parallel to the central axis of the tool holder, and transversely to the axial direction and each comprises a main cutting edge which is oriented at a first acute angle (γ) to the central axis of the tool holder.