Abstract: In order to develop new generation monolayer brazing CBN (cubic boron nitride) grinding wheels, two types of active filler alloys (Ni-Cr and Ag-Cu-Ti) were tested in vacuum furnace.The results show that a Ni-Cr alloy fails to wet and bond CBN grits,while a Ag-Cu-Ti alloy exhibits good wetting and bonding towards CBN grits.SEM EDS microanalyses have shown that during brazing Ti in Ag-Cu-Ti alloy segregated preferentially to the surface of the CBN to form a Ti rich reaction product.X-ray diffraction reveals that the wetting and bonding behaviour on CBN surface by Ag-Cu-Ti alloy melt are realized through TiN and TiB which are produced by interaction between Ti atoms of Ag-Cu-Ti alloy and N or B atoms of CBN surface at elevated temperatures.The rupture occurs in Ag-Cu-Ti alloy layer.It can be considered that chemical metallurgic bonding has formed in the interface between CBN grits and Ag-Cu-Ti alloy.Finally a monolayer brazing CBN grinding wheel with regular abrasive distribution was put forward to try a grinding test.The experimental results show distinct advantages over conventional electroplated CBN grinding wheel.