Hydraulic spherical grabs

For partially or uncased drills and/or when vibration-free drilling is required, the hydraulic spherical grab is used. Several hydraulic cylinders in the body of the grab provide high closing torques. In combination with its large dead weight, this ensures a constantly good filling level of the grab buckets. The hydraulic rotary drive allows controlled rotation of the drilling grab around the vertical axis by ± 100°. In order to detect and counteract deviations from the vertical axis, all LEFFER hydraulic grabs are equipped with a 2-axis inclinometer. A simultaneous display in the operator‘s cab of the carrier provides additional support during calibration – especially for uncased drills.