A lightweight insert gradient coil was constructed for high resolution brain imaging. The coil was designed as a single-axis unshielded coil to accelerate EPI readouts. The resulting coil weighs 45 kg and can be quickly positioned in the scanner by two persons. Theoretically, a gradient strength of 210 mT/m can be achieved with a slew rate of 1088 T*m-1*s-1 when driven at 400V/600A. In a 7 tesla scanner, an efficiency of 0.35 mT*m-1*A-1 with a slew rate of 800 T*m-1*s-1 was measured. Experiments on five healthy volunteers resulted in no experiences of nerve stimulation.