The use of the principle of rotary inertia force is made by the hammer, the ram frame, eccentric blocks, pulleys and motors and other components. The motor and transmission parts are mounted on the skid base, ram-frame back-end and drive shaft hinge, the eccentric block centrifugal force compactor frame swing around this axis. Ram frame front end is equipped with a hammer, tamping the soil when the compactor frame to the bottom of swing, forward swing to the top of the sled seat. Therefore, the frog rammer hammer every impact, the body is to move forward one step. 
 Technical parameters: 
 Ram engine energy: 60Kg 
 Ram head and pick up high :100-170mm 
 Forward speed :6-8m / min. 
 Motor: 3KW 
 To tamping Energy: 60kg / m 
 Compacting numbers :120-140 beats / min 
 Before the strike speed :8-13 m / min 
 Ram plate size: 120 × 500mm 
 Motor power: 3KW 
 Dimensions: 1050 × 500 × 640mm 
 Weight: 180kg