... 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 operations necessary tools.Second, the main technical parameters1, motor power: 1.0 kW2, rated ... Φ 13.5 mm, Φ 9.8 mm5, drilling time:<=40s6, the machine quality: 23 kg7, physical size: 530 mm x 330 ...