Two-stage speed shifting vortex gearcase
Transmission Type:Automatic Centrifugal
Transmission Ratio:30:1 
Boring Roting Speed (rpm):180-210rpm 
Boring Rotate Direction:clockwise 
Engine Model:1E50FB 
Displacement (CC):72CC 
Max Power (kw/r/min):3.4kw/7000rpm 
Max Torque (N.m/r/min):2.45 
Starting System:Re-coil 
Cooling System:Air-cool 
Ignition System:C.D.I 
Spark Plug: L7T 
Fuel Mixed Ratio:Gasoline(25):2cycle oil(1) 
Fuel Tank Capacity (L):1.2 
Package Weight:13.6Kgs
Machine carton size:45x37x30cm
Drill Bit Dimension:Height:80cm/100cm 
Diameter: 80,100,150,200,250,300mm