The main parameters：
Power supply(V/Hz):220/50
Motor power(Kw):0.37
Max.lifting force(Kg):300
Drum diameter(mm):?140
Drum speed(R/Min):9.25
Max.hoisting height(m):4.8
Deadweight lowering weight(Kg):12
Gear ratio of big and small chain wheels(gears):30/9
Specification of bushroller chain:10A-1-56
Weight of main engine(Kg):13.5