Patent Model hand chain block, the hook can be rotated in 360 degree. Patent No.ZL 2017 20113299.0.
The load sprocket adopts overall bearing to reduce the force of hand, tomaximize mechanical efficiency.
The top and bottom hook are made of forged high strength alloy, accomplished by hear treatment process. The hooks also have three stretch indicators.
However if by any chance the hook is overloaded there is no fear of it breaking. It will simply gradually start straightening out, avoiding any load drop or personal injury.
Standard G80 Load Chain, meetint to EN818-7 quality Standard of the chain.
Hand chain cover can be rotated in 360 degree and the unique design of the load sprocket make the chain blocks can be operated in any position and angle.
LINKS : Dongqi Crane