Rail driller: 1, motor power: 1.0 kW 2, rated voltage: 220 v 3 ... is compact, rail clamping device with self-locking function, accurate positioning, drilling high precision. The hollow ... bit, drilling with automatic feed water function, is works departments maintenance, repair and overhaul ... Second, the main technical parameters1, motor power: 1.0 kW2, rated voltage: 220 v3, no-load speed: ...