Brazing of diamonds is important in grinding technology. The brazing parameters can strongly influence the grinding tool's performance. In this work a Cu–Sn-based active filler alloy (73.9 Cu–14.4 Sn–10.2 Ti–1.5 Zr, wt.%) was applied to join monocrystalline block-shaped diamonds onto a stainless steel substrate using three different brazing temperatures (880, 930 and 980°C) and two different dwell times (10 and 30min), respectively. The characteristics of the joints were investigated by means of scanning electron microscopy and energy dispersive X-ray spectroscopy (microstructure and phase composition), by Raman-spectroscopy (residual stress) as well as by shear testing (bond strength). The microstructural investigations revealed an intermetallic interlayer of type Fe 2 Ti at the steel-filler alloy interface, which grew with increasing brazing temperatures and longer dwell durations. The brazing parameters strongly affected the residual stresses in the diamond. Compressive residual stresses with a maximum value of −350MPa were found in the samples brazed at 880 and 930°C, whereas tensile stresses of maximum +150MPa were determined in samples joined at 980°C. The effect of the brazing parameters on the shear strength is very pronounced. The shear strength decreased from (321±107)MPa at 880°C, 10min to (78±30)MPa at 980°C, 30min.