NZG31 Petrol Engine Rail Drilling Machine This machine is an indispensable tool for railway maintenance construction and emergency repair operations It uses a hollow drill bit a screw nut clamping mechanism with quick opening function fast clamping accurate positioning fast drilling simple operation and safety use PRODUCT SPECIFICATIONS Model NZG31 Type Rail Drilling Machine Material Stainless Steel Dimensions L x W x H 650 230 250mm Internal combustion engine fourstroke petrol engineHonda Engine Power 12kW Idle Rev 270rmin Borehole diameter 9836mm Drilling time 25s Machine weight 17kg