... hook unit up or down. Lifting height H = 6m, when Crane capacity <10t, we should use a elastic ... prevent steel wire rope mess aroundWhen H ≥ 9m, crane ≤ 10t; H ≥ 6m, weight ≥ 12.5t, we should add ... a rigid coupling.When H ≥ 9m, from the weight ≤ 10t; H ≥ 6m, when equipped with a crane ≥ 12 ... ring rubber seal oil to prevent oil spills. CD1 electric hoist lifting motor is tapered with a brake rotor motor. ...